Add central material calibration support

.gitignore

@@ -29,3 +29,6 @@ secrets/*
 .DS_Store
 
 activate.sh
+
+# Live polling checkpoints
+data/state/

README.md

@@ -7,8 +7,11 @@ production-order context, and calculation state.
 
 ## Status
 
-This repository includes a read-only ENLYZE API exploration CLI. It contains
+This repository includes an ENLYZE exploration CLI, a production-run/timeseries
-no verified ENLYZE operation wrappers, database migrations, or HTTP endpoints.
+gateway, and a configured continuous material polling runner with atomic JSON
+checkpoints and PostgreSQL cumulative material-consumption snapshots for Grafana.
+The live material-consumption MVP remains in progress.
+There are no HTTP endpoints.
 
 ## Intended flow
 
@@ -76,7 +79,7 @@ Call `process(sample)` or `process_many(samples)` on the same instance for live
 input, replay, or successive chunks. Both use the same calculation. The immutable
 `state` snapshot exposes cumulative kg, integrated running seconds, last timestamp
 (UTC), last rate, last gate, and whether the latest gate is active. State restoration
-and persistence are not implemented yet. Naive timestamps and non-finite values
+and JSON persistence are supported. Naive timestamps and non-finite values
 are rejected; backwards timestamps raise without changing state. Duplicate
 timestamps add no consumption but replace the baseline in arrival order.
 Finite negative material rates are currently accepted and decrease cumulative
@@ -88,13 +91,285 @@ Run `python scripts/validate_k7_material_consumption.py` from the repository roo
 with the ignored `k7-00842-throughput.raw.json` and `k7-00842-speed.raw.json`
 captures in `data/raw/enlyze/`. The utility joins common non-null timestamps
 without filling values and rejects unordered or duplicate capture records.
-K7-specific signal UUIDs are confined to the utility: `Stundenleistung Anlage`
+K7-specific signal UUIDs are declared in the runner configuration and validation
-is gated by `Geschwindigkeit Gesamtanlage > 0.5 m/min`. With the explicit
+utility: `Stundenleistung Anlage` is gated by `Geschwindigkeit Gesamtanlage > 0.5 m/min`. With the explicit
 20-second validation gap limit (`--max-sample-gap-seconds` to override),
 2,672 common samples yield **5.205555556 h** and **5,180.127150811 kg** for run
 00842, matching the previous manual calculation's rounded results. Synthetic
 tests verify equivalence to manual interval integration without local captures
-or live ENLYZE access. Production polling, Grafana, and Bento 1 are not implemented.
+or live ENLYZE access. Grafana and Bento 1 remain pending.
+
+`MaterialPollingService.poll_once(now=...)` starts at the open run's start or
+resumes inclusively at its last processed timestamp. Duplicate boundary samples
+add no time. A new run UUID for the same order retains cumulative kg and running
+seconds but resets the temporal baseline; different orders and machines have
+separate state. Empty responses add no consumption. Naive `now` is rejected;
+no open run or a window beginning after `now` returns `None` without saving.
+
+`JsonMaterialStateStore` uses deterministic SHA-256 filenames derived from the
+machine/order pair, preventing path traversal and sanitized-name collisions.
+It flushes and fsyncs a temporary file in the state directory before atomic
+replacement; a failed write leaves the previous primary file intact. Missing
+state returns `None`; malformed JSON or state raises `ValueError` with file
+context. Use an ignored runtime directory and one polling writer per state key;
+atomic replacement does not coordinate concurrent read-modify-write cycles.
+Files from the earlier uncommitted sanitized-filename prototype are not loaded
+under the new names. The gateway rejects ambiguous open runs, naive windows,
+and missing columns or malformed records instead of silently skipping them.
+
+## Continuous material polling
+
+The committed [K7 configuration](config/k7-material-consumption.yaml) declares
+`k7-fiber-consumption`, a `material_consumption` calculation at version `"1"`.
+It selects `Stundenleistung Anlage` (kg/h) as the rate and `Geschwindigkeit
+Gesamtanlage` (m/min) as the gate, integrating only when the gate is **strictly
+above 0.5**, with a maximum sample gap of 20 seconds. `Anlage läuft` is not the
+primary gate. The output is `material_consumption` in `kg`, grouped by
+`production_order`; production orders remain opaque strings, including leading
+zeros and whitespace.
+
+Install the declared dependencies in the repository venv, then run from the
+repository root:
+
+```bash
+.venv/bin/python -m pip install -e '.[dev]'
+.venv/bin/python -m production_analytics.cli run material-poll \
+  --config config/k7-material-consumption.yaml \
+  --calculation-id k7-fiber-consumption \
+  --poll-interval-seconds 10 \
+  --state-directory data/state/material \
+  --secrets-file secrets/enlyze.env
+```
+
+The installed `production-analytics run material-poll` command is equivalent.
+The interval, state directory, and secrets path above are defaults. Paths are
+relative to the current working directory. Existing `ENLYZE_BASE_URL`,
+`ENLYZE_API_KEY`, and `ENLYZE_HTTP_TIMEOUT_SECONDS` handling is reused; values
+in the secrets file override environment values. Keys are never CLI arguments.
+
+Keep calculation fields in YAML and technical runtime settings in CLI options.
+The loader requires every field shown in the K7 file, rejects unknown fields,
+duplicate keys/ids, unsupported types/versions/outputs, and invalid or non-finite
+numbers. Numeric fields must be YAML numbers, and `version` must be quoted.
+Multiple material calculations may share a file, but then `--calculation-id` is
+required. All entries are validated before selection. The unrelated
+`config/calculations.example.yaml` remains illustrative and is not executable
+by this material-only runner.
+
+The foreground runner polls once immediately using UTC, then sleeps for the
+configured positive interval after each completed cycle, including failures.
+A slow poll delays the next cycle; there is no overlap or catch-up scheduling.
+Ctrl-C/SIGINT exits cleanly. Successful cycles print machine, opaque order,
+cumulative kg, integrated running seconds, and cycle-start timestamp. No open
+run (or no eligible window) is normal and visible. Errors on stderr identify
+state loading/saving or ENLYZE/gateway/polling and the exception class; arbitrary
+exception text and response bodies are withheld to avoid leaking credentials.
+Startup/configuration failures return non-zero; cycle failures retry after the
+delay without replacing checkpoints with empty state.
+
+Checkpoints live in ignored `data/state/material/` by default, with one hashed
+JSON filename per machine/order pair. Run **one polling writer per state key**;
+there is no multi-process locking. Use a separate state directory when changing
+calculation parameters or running a different calculation for the same machine
+and order: checkpoints are not namespaced by calculation id/version. These files
+are integration checkpoints, not a Grafana metric store.
+
+Each successful non-empty poll writes one cumulative snapshot to PostgreSQL before
+printing its result. JSON remains the restart checkpoint; PostgreSQL stores derived
+time-series snapshots only. ENLYZE remains the raw-data source of truth. Database
+write failures emit a concise error and polling continues with the next cycle;
+missed snapshots are not retried or backfilled and JSON state is not rolled back.
+The next successful snapshot includes the continuing cumulative total.
+
+A new order's first snapshot is **not guaranteed to be zero**: the service processes
+available samples from the run start before returning, so its first total may
+already be non-zero. A returned zero is stored normally. Totals continue across
+runs for the same order; existing checkpoints for a previously seen order resume.
+
+### PostgreSQL setup
+
+Set all five runtime settings: `POSTGRES_HOST`, `POSTGRES_PORT`, `POSTGRES_DB`,
+`POSTGRES_USER`, and `POSTGRES_PASSWORD`, using exported environment variables or
+the existing secrets file (file values override the environment). The runner does
+not automatically load `.env`. Missing or invalid settings fail at startup;
+connectivity and schema errors are reported during polling. For the existing
+Compose instance, use host `localhost`, the published port (default `5432`), and
+`production_analytics` for both database and user. Set the same password in
+Compose's `.env` and the runner environment/secrets file.
+
+Start the database and apply the repeatable schema from the repository root:
+
+```bash
+docker compose up -d timescaledb
+docker compose exec -T timescaledb psql -U production_analytics -d production_analytics \
+  -v ON_ERROR_STOP=1 < db/schema.sql
+```
+
+Wait until PostgreSQL is ready before applying the schema. Configure Grafana's
+PostgreSQL data source to query `material_consumption_snapshots`, selecting
+`timestamp` as time and `consumption_kg` as the cumulative value, filtered by
+`calculation_id`, `machine_id`, and `production_order`. These are ordinary
+PostgreSQL tables/indexes; no Timescale-specific features or hypertables are used.
+The primary key deduplicates calculation/machine/order/timestamp (first write wins).
+A short transaction opens and closes one synchronous connection per snapshot,
+with 10-second connection and statement timeouts. Snapshot timestamps are poll
+start times, not source-sample timestamps. Schema application is manual.
+Bento 1 bentonite source and gate selection remain intentionally undefined pending
+process validation; the generic integration core is unchanged and reusable.
+
+## ERP current workplace status
+
+The read-only ERP adapter reads production-order/article context from MSSQL
+`NV_DWH.dbo.GRAFANA_WORKPLACE_STATUS`, for later live material KPIs. Credentials
+belong in ignored `secrets/erp.env`, using `ERP_DB_HOST`, `ERP_DB_PORT`,
+`ERP_DB_NAME`, `ERP_DB_USER`, and `ERP_DB_PASSWORD`. The verified endpoint is
+`192.168.111.24:49601`, database `NV_DWH`, using SQL Server authentication and
+a read-only account. All settings are required; ports must be integers 1–65535.
+
+```python
+from production_analytics.erp import ErpSettings, ErpWorkplaceStatusGateway
+
+settings = ErpSettings.from_secret_file()  # File values override environment values.
+status = ErpWorkplaceStatusGateway(settings).get_current_workplace_status("K7")
+```
+
+Alternatively, use `ErpSettings.from_environment(mapping)`. The existing simple
+dotenv loader is reused; no shell content is executed. Each call opens and closes
+one connection, with 10-second login/query timeouts, and performs a parameterized
+SELECT filtered by workplace. Zero rows returns `None`, one row returns an
+immutable `CurrentWorkplaceStatus`, and multiple rows raise `ErpReadError`.
+Driver failures and malformed rows also raise `ErpReadError` with safe messages.
+
+Only trailing whitespace is removed from workplace, production order, article
+number, and description; identifiers otherwise remain unchanged. Nullable fields
+stay `None`. Decimal/integer quantities are explicitly converted to finite floats
+(with normal floating-point precision); non-finite/overflowing values are rejected.
+Quantity fields use m² and remaining time uses hours, following the supplied source
+semantics. `feedback_timestamp` is preserved exactly, including a naive timezone.
+It represents the latest ERP feedback, and the ERP export is delayed relative to
+live process data; the adapter makes no freshness inference.
+
+Automated ERP tests use mocks and require no live connectivity.
+
+## ERP context normalization
+
+Two pure helpers in `production_analytics.context` prepare context for later KPIs:
+
+- `build_enlyze_production_order(erp_production_order, format_template) -> str`
+  uses an explicit template configured by the caller per machine/workplace.
+  The template requires exactly one literal `{production_order}` placeholder and
+  no other braces; invalid templates raise `ValueError`.
+  Outer ERP-order whitespace is stripped and the
+  remaining order must contain only ASCII digits. Leading zeros are preserved.
+  Empty/invalid orders raise `ValueError`. There is no default machine rule.
+- `extract_nominal_width_m(article_description: str | None) -> float | None`
+  is generic across machines and conservatively reads a single
+  `<width> x <length> m` pair, accepting decimal
+  comma/point and variable whitespace. For example, `Stex R 1501 C (PR) 5,80 x 50 m`
+  yields `5.8`. Earlier article numbers and trailing descriptive text are ignored.
+  Missing, malformed, multiple or chained dimension patterns return `None`, as do
+  non-positive/non-finite dimensions. Signed/scientific notation and other units
+  are deliberately unsupported; both dimensions must be positive plain numbers.
+
+K7 currently uses the explicit template `K 7-{production_order}`:
+
+```python
+k7_order_template = "K 7-{production_order}"
+enlyze_order = build_enlyze_production_order("12026000815", k7_order_template)
+# "K 7-12026000815"
+```
+
+Future machines may supply different verified templates without changing the
+generic helper. Template selection belongs to machine/workplace configuration
+or adapters; the helper contains no workplace lookup or machine-specific branch.
+No other machine rule is introduced here.
+
+ENLYZE production-order identifiers remain opaque everywhere else, with exact
+comparison. These helpers never reverse-parse or split ENLYZE orders, including
+combined identifiers such as `K 7-12025000074-K 7-12025000075`; passing such an
+identifier to the ERP mapping function is rejected.
+
+Nominal finished-product width currently comes from ERP article-description
+parsing because neither verified DWH view (`dbo.GRAFANA_WORKPLACE_STATUS` and
+`dbo.GRAFANA_PRODUCTION_CONFIRMATION`) has a dedicated width column. ENLYZE
+`wLg1MeasuringWidth` (`Produktbreite`) is explicitly not used as K7 nominal
+finished-product width:
+it belongs to the MAHLO measurement system and observed values differ from nominal
+article widths. Structured ERP product master data would be preferred when available.
+
+These helpers are independent of database access. The service below composes them
+for material efficiency; no background processing is attached.
+
+## Feedback-aligned material efficiency
+
+`MaterialEfficiencyService` in `service.material_efficiency` combines ERP good area
+with cumulative material consumption for one exact production order. Its
+`evaluate_current()` reads the existing ERP workplace adapter once; `evaluate(status)`
+evaluates an already supplied `CurrentWorkplaceStatus`. Both return an immutable
+`MaterialEfficiencySnapshot` or `None` when inputs are unavailable.
+
+`PostgresMaterialSnapshotRepository(settings).latest_at_or_before(...)` in
+`service.postgres_material` takes keyword arguments `calculation_id`, `machine_id`,
+`production_order`, and an aware `timestamp`. A parameterized query selects the
+latest snapshot **at or before ERP feedback time**, matching calculation, machine,
+and mapped order exactly. It returns `MaterialConsumptionSnapshot` or `None`.
+Run IDs do not restrict this lookup: stored consumption is already cumulative
+across the order's runs. The service neither reintegrates nor sums snapshots and
+does not bridge run boundaries.
+
+The result includes workplace/machine/calculation identifiers, both order identifiers,
+article context, nominal width, the UTC ERP feedback instant and selected material timestamp, good area, aligned
+consumption, `material_consumption_kg_per_m2 = consumption_kg / good_quantity_m2`,
+and `material_consumption_g_per_m2 = material_consumption_kg_per_m2 * 1000`.
+Nominal width comes from generic ERP description parsing and is context only;
+ERP good square metres remain authoritative even when width cannot be parsed.
+
+Missing ERP status, missing aligned material, missing/non-positive/non-finite good
+area, invalid consumption (negative or non-finite), or non-finite computed ratios
+produce `None`. Zero consumption is valid. Configuration errors, invalid timestamp
+alignment, and database failures raise rather than masquerading as missing data.
+
+All machine/workplace settings are supplied explicitly. Example using the existing
+K7 material calculation (with previously constructed ERP gateway and PG settings):
+
+```python
+from zoneinfo import ZoneInfo
+
+from production_analytics.service.material_efficiency import MaterialEfficiencyService
+from production_analytics.service.postgres_material import PostgresMaterialSnapshotRepository
+
+service = MaterialEfficiencyService(
+    erp_gateway, PostgresMaterialSnapshotRepository(postgres_settings),
+    workplace="K7",
+    machine_id="c220f95c-a65e-4cb7-99b7-0626d6c7508c",
+    calculation_id="k7-fiber-consumption",
+    format_template="K 7-{production_order}",
+    # Supply only after verifying the ERP timestamp's source timezone:
+    erp_timezone=ZoneInfo("Europe/Berlin"),
+)
+result = service.evaluate_current()
+```
+
+Aware ERP timestamps are compared as UTC instants. Naive ERP timestamps require
+explicit `erp_timezone`; there is no inferred system/database timezone. Ambiguous
+or nonexistent local times during DST transitions are rejected. The result carries the
+ERP feedback instant normalized to UTC and the selected aware material timestamp.
+The original ERP status object remains unchanged.
+
+This alignment avoids knowingly including future material consumption, but does
+not eliminate ERP roll-feedback timing uncertainty (feedback may be roughly one
+roll ahead or otherwise offset). Live values are plausibility indicators; final
+production-order values are more meaningful as relative timing error diminishes.
+There is no interpolation, lag correction, smoothing, freshness threshold, or
+estimated timestamp. Historical bootstrap snapshots are usable only when their
+stored timestamps satisfy the cutoff; a later cumulative total cannot reconstruct
+an earlier value. Reliable final evaluation requires retaining final ERP feedback;
+the current-workplace adapter alone does not provide historical completed orders.
+
+The service itself returns results in memory without modifying material snapshots.
+The standalone persistence runner is described below. Daily per-machine 24h reporting
+and aggregation remain future work. Repository SQL tests use an in-memory SQLite
+fixture with driver transport adaptation; they require no live PostgreSQL.
 
 ## Peak-cycle detection
 
@@ -132,8 +407,62 @@ completed peaks, including a legitimate approximately 1195 kg cycle. Run
 available. Neither capture should be added to version control or automated
 tests.
 
-`docker compose up -d timescaledb` is an optional local database design for a
+The normal unit test suite mocks PostgreSQL and requires no live database.
-future persistence milestone. It is not required for the bootstrap tests.
 
 See [PROJECT_KNOWLEDGE.md](PROJECT_KNOWLEDGE.md) for durable project context
 and [docs/roadmap.md](docs/roadmap.md) for the implementation sequence.
+
+### Feedback-driven material-efficiency persistence
+
+Apply the updated `db/schema.sql` using the PostgreSQL setup command above, then run
+this independent foreground process:
+
+```bash
+production-analytics run material-efficiency --config config/k7-material-efficiency.yaml
+```
+
+`poll_interval_seconds` in YAML defaults to 60 seconds (fixed delay after each
+cycle). Workplace, machine, calculation, order format and `erp_timezone` are also
+configured in YAML; K7 uses `Europe/Berlin`. PostgreSQL settings use the existing
+exported `POSTGRES_*` variables and `--secrets-file` (default `secrets/enlyze.env`);
+ERP uses `--erp-secrets-file` (default `secrets/erp.env`). No additional secrets are
+needed, and `.env` is not loaded automatically.
+
+`PostgresMaterialEfficiencyWriter.write(snapshot) -> bool` validates aware
+timestamps and finite numbers, then inserts all KPI fields in a short transaction.
+`material_efficiency_snapshots` retains one immutable point per
+`(calculation_id, machine_id, enlyze_production_order, erp_feedback_timestamp)`.
+The writer uses `RETURNING 1` to return `True` for a new insert and `False` for a
+duplicate. Only new inserts produce a flushed stdout line with feedback time,
+workplace, order, good m², material kg and g/m². Unavailable evaluations and
+duplicates remain silent.
+Repeated evaluations attempt `ON CONFLICT DO NOTHING`; they never update history,
+including after a restart. Missing/invalid KPI inputs produce no row and can be
+retried on a later cycle. Nullable article context remains SQL NULL.
+
+Persistence frequency follows ERP feedback changes, not ENLYZE sample frequency.
+This runner is independent of the 10-second material polling process. Live values
+are plausibility indicators; final production-order (FA) values are more meaningful.
+Grafana can read PostgreSQL alone:
+
+```sql
+SELECT erp_feedback_timestamp AS "time", material_consumption_g_per_m2
+FROM material_efficiency_snapshots
+WHERE $__timeFilter(erp_feedback_timestamp)
+  AND calculation_id = 'k7-fiber-consumption'
+  AND machine_id = 'c220f95c-a65e-4cb7-99b7-0626d6c7508c'
+ORDER BY erp_feedback_timestamp;
+```
+
+ERP read errors and transient PostgreSQL connection/operational errors are reported
+using error classes only and retried after the configured delay. Each database
+operation opens a fresh connection. Configuration, schema/programming and invalid
+timestamp contract errors terminate with a nonzero CLI exit; ambiguous/nonexistent
+DST feedback remains rejected. Ctrl-C stops the foreground runner cleanly.
+
+The current-status ERP source cannot backfill feedback events missed between polls
+or during outages, nor guarantee observation of final FA feedback before the order
+changes. Daily 24h reports and final order summary tables remain future work.
+No dashboard, aggregation or lag correction is added here.
+
+Bento 1: [fresh bentonite consumption configuration and scope](docs/bento1-fresh-bentonite.md).

config/bento1-material-consumption.yaml

@@ -0,0 +1,21 @@
+# Fresh bentonite only: the recycled/recovered third spreader is excluded.
+calculations:
+  - id: bento1-fresh-bentonite-consumption
+    type: material_consumption
+    version: "1"
+    machine_ref: 5f42a4f6-9ca0-4f6f-9786-40d50a35b230
+    process_application_calculation_id: bento1-fresh-bentonite-application
+    source_mode: rotational_discharge
+    rotational_speed_signal_refs:
+      - 6e5d2d94-98f9-4cc1-8a88-7987c6282525
+      - cd7385c4-337b-4759-ab32-45d65beaf190
+    calibration_ref: bento1-spreader-1-2
+    # Transport Auszug Geschwindigkeit Istwert, m/min (production gate only).
+    gate_signal_ref: fef41976-1103-4090-b780-eaeecc02fdfa
+    gate_threshold: 0.3
+    max_sample_gap_seconds: 20.0
+    erp_workplace: Bento 1
+    production_order_format: "Bento 1-{production_order}"
+    output_metric: material_consumption
+    output_unit: kg
+    group_by: production_order

config/bento1-material-efficiency.yaml

@@ -0,0 +1,7 @@
+workplace: BENTO 1
+machine_id: 5f42a4f6-9ca0-4f6f-9786-40d50a35b230
+calculation_id: bento1-fresh-bentonite-consumption
+output_calculation_id: bento1-fresh-bentonite-efficiency
+production_order_format: "Bento 1-{production_order}"
+erp_timezone: Europe/Berlin
+poll_interval_seconds: 60

config/k7-material-consumption.yaml

@@ -0,0 +1,14 @@
+# Validated K7: Stundenleistung Anlage (kg/h), gated by
+# Geschwindigkeit Gesamtanlage (m/min) > 0.5. Not Anlage läuft.
+calculations:
+  - id: k7-fiber-consumption
+    type: material_consumption
+    version: "1"
+    machine_ref: c220f95c-a65e-4cb7-99b7-0626d6c7508c
+    rate_signal_ref: c9d06af5-f6d6-4ede-b6c4-5a98bac77129
+    gate_signal_ref: 823867bb-f5d2-40eb-b875-657155addfd0
+    gate_threshold: 0.5
+    max_sample_gap_seconds: 20.0
+    output_metric: material_consumption
+    output_unit: kg
+    group_by: production_order

config/k7-material-efficiency.yaml

@@ -0,0 +1,6 @@
+workplace: K7
+machine_id: c220f95c-a65e-4cb7-99b7-0626d6c7508c
+calculation_id: k7-fiber-consumption
+production_order_format: "K 7-{production_order}"
+erp_timezone: Europe/Berlin
+poll_interval_seconds: 60

config/material-calibrations.yaml

@@ -0,0 +1,14 @@
+calibrations:
+  bento1-spreader-1-2:
+    type: rotational_discharge
+    value: 2.75
+    unit: kg_per_rev_m
+    calibrated_at: 2026-09-08
+    method: gravimetric_tray
+    description: Bento 1 fresh-bentonite spreaders 1 and 2
+    reference:
+      measured_application_g_m2: 4068
+      line_speed_m_min: 2.3
+      signal_values:
+        left: 1.65
+        right: 1.75

db/schema.sql

@@ -0,0 +1,48 @@
+CREATE TABLE IF NOT EXISTS material_consumption_snapshots (
+    timestamp timestamptz NOT NULL,
+    calculation_id text NOT NULL,
+    machine_id text NOT NULL,
+    production_order text NOT NULL,
+    run_id text NOT NULL,
+    consumption_kg double precision NOT NULL,
+    PRIMARY KEY (calculation_id, machine_id, production_order, timestamp)
+);
+
+-- Machine time series across orders; the primary key covers a specific order.
+CREATE INDEX IF NOT EXISTS material_consumption_snapshots_machine_time_idx
+    ON material_consumption_snapshots (calculation_id, machine_id, timestamp);
+
+CREATE TABLE IF NOT EXISTS material_efficiency_snapshots (
+    erp_feedback_timestamp timestamptz NOT NULL,
+    material_snapshot_timestamp timestamptz NOT NULL,
+    calculation_id text NOT NULL,
+    machine_id text NOT NULL,
+    workplace text NOT NULL,
+    erp_production_order text NOT NULL,
+    enlyze_production_order text NOT NULL,
+    article_number text NULL,
+    article_description text NULL,
+    nominal_width_m double precision NULL,
+    good_quantity_m2 double precision NOT NULL,
+    material_consumption_kg double precision NOT NULL,
+    material_consumption_kg_per_m2 double precision NOT NULL,
+    material_consumption_g_per_m2 double precision NOT NULL,
+    PRIMARY KEY (calculation_id, machine_id, enlyze_production_order, erp_feedback_timestamp)
+);
+
+CREATE INDEX IF NOT EXISTS material_efficiency_snapshots_machine_time_idx
+    ON material_efficiency_snapshots (calculation_id, machine_id, erp_feedback_timestamp);
+
+-- Instantaneous process measurements; no ERP good-area denominator.
+CREATE TABLE IF NOT EXISTS material_application_snapshots (
+    timestamp timestamptz NOT NULL,
+    calculation_id text NOT NULL,
+    machine_id text NOT NULL,
+    production_order text NOT NULL,
+    run_id text NOT NULL,
+    application_g_m2 double precision NOT NULL,
+    PRIMARY KEY (calculation_id, machine_id, production_order, timestamp)
+);
+
+CREATE INDEX IF NOT EXISTS material_application_snapshots_machine_time_idx
+    ON material_application_snapshots (calculation_id, machine_id, timestamp);

docs/bento1-fresh-bentonite.md

@@ -0,0 +1,250 @@
+# Bento 1 fresh bentonite KPIs
+
+
+## Three distinct quantities
+
+All **fresh bentonite** values exclude the third recycled/recovered-material
+scatterer. Only the two actual rpm signals listed below are used; no SET signals
+are introduced. The specific discharge is central calibration
+data: **2.75 kg/(revolution × metre product width)**.
+
+A) **Instantaneous process application [g/m²]**
+
+`application_g_m2 = (rpm_left + rpm_right) × 2.75 × 1000 / line_speed_m_min`
+
+Emitted only for observed samples with line speed **strictly greater than
+0.3 m/min**. Zero, near-zero, negative and threshold-equal speeds emit no point.
+Width cancels between kg/min and m²/min; neither nominal width nor ERP good area
+enters this formula. For 3.739 + 3.956 rpm at 8 m/min the result is 2645.15625 g/m².
+This is fresh-roll process application, not FA material efficiency.
+
+B) **Cumulative fresh consumption [kg]**, unchanged
+
+`kg/min = (rpm_left + rpm_right) × nominal_width_m × 2.75`
+
+The existing previous-value integration sums `kg/min × elapsed_seconds / 60`
+for eligible intervals, using the preceding sample's production gate. Width
+continues to come from the ERP nominal-width parser. The integration algorithm,
+gap handling, order checkpoint format and disjoint-run accumulation are unchanged.
+
+C) **FA material efficiency [g/m²]**
+
+`efficiency_g_m2 = cumulative_fresh_bentonite_kg × 1000 / cumulative_good_area_m2`
+
+The generic material-efficiency service reads the latest exact-order cumulative
+snapshot **at or before the ERP feedback timestamp**, then divides by that
+feedback's cumulative good area. Missing/nonpositive good area emits no point.
+This ratio includes losses captured by the existing consumption model (startup
+material, rejects and other consumed material not represented in good area).
+It does not add consumption during intervals excluded by the validated gate or
+gap rules, including stopped-line periods. Disjoint runs of one FA share the
+existing order total; their cumulative snapshots must not be summed again.
+
+## Configuration, PostgreSQL and Grafana
+
+| Calculation ID | Table | Value column | Time column |
+| --- | --- | --- | --- |
+| `bento1-fresh-bentonite-application` | `material_application_snapshots` | `application_g_m2` | `timestamp` |
+| `bento1-fresh-bentonite-consumption` | `material_consumption_snapshots` | `consumption_kg` | `timestamp` |
+| `bento1-fresh-bentonite-efficiency` | `material_efficiency_snapshots` | `material_consumption_g_per_m2` | `erp_feedback_timestamp` |
+
+Scope Grafana queries by calculation ID and
+`machine_id = '5f42a4f6-9ca0-4f6f-9786-40d50a35b230'`; optionally filter by
+`production_order` (application/consumption) or `enlyze_production_order`
+(efficiency). The efficiency table also stores `good_quantity_m2`,
+`material_consumption_kg`, `material_consumption_kg_per_m2` and
+`material_snapshot_timestamp` for auditability.
+
+`config/bento1-material-consumption.yaml` opts into process snapshots through
+`process_application_calculation_id`. This generic option requires rotational
+sources and a positive speed gate. Both outputs reuse the same configured ACT
+signals, discharge factor and samples. Process points use source timestamps,
+including bootstrap samples from disjoint runs; no interpolation or hold-forward
+points are stored for inactive periods. Configure Grafana to leave missing
+periods as gaps rather than carrying the last active value forward.
+
+The shared consumption poller still requires valid ERP width/order context to
+complete a cycle, although the application formula itself has no width input.
+Application rows are committed before the existing checkpoint advances; a failed
+application write retries the window. Duplicate source timestamps are ignored by
+the primary key. Existing checkpoints are retained, so earlier application
+history is not automatically backfilled. K7 does not enable this output.
+
+`config/bento1-material-efficiency.yaml` uses the existing generic runner.
+`calculation_id` selects the cumulative input; optional `output_calculation_id`
+sets the distinct persisted KPI ID. Omitting it preserves existing behavior,
+including K7. ERP workplace `strip().casefold()` normalization is unchanged.
+
+Before deploying, apply the additive, idempotent `db/schema.sql` to the existing
+PostgreSQL database to create `material_application_snapshots` and its index.
+The existing consumption and efficiency tables need no column migration. For
+example, on the deployment host:
+
+```sh
+docker compose exec -T timescaledb psql -U production_analytics -d production_analytics \
+  -v ON_ERROR_STOP=1 < db/schema.sql
+```
+
+Restart the configured Bento consumption runner to enable process persistence,
+and supervise a separate generic efficiency runner:
+
+```sh
+production-analytics run material-efficiency \
+  --config config/bento1-material-efficiency.yaml \
+  --secrets-file secrets/enlyze.env --erp-secrets-file secrets/erp.env
+```
+
+No cleanup/reset of validated rpm consumption state or snapshots is required for
+these additions. No database migration, live service restart or historical data
+cleanup was performed as part of this implementation.
+
+## Validated cumulative model details
+
+`config/bento1-material-consumption.yaml` defines
+`bento1-fresh-bentonite-consumption`, an estimate of **fresh bentonite consumption**
+from actual spreader roll speeds. Both needle rolls apply sequentially across the
+full web width. The recycled/recovered third spreader is excluded.
+
+The generic `rotational_discharge` source converts one or more rpm signals to the
+existing integrator's kg/h: `sum(rpm) × nominal_width_m × specific_discharge_kg_per_rev_m × 60`.
+Bento config sets the factor to **2.75 kg/(rev·m)** and uses:
+
+- Right ACT: `6e5d2d94-98f9-4cc1-8a88-7987c6282525`
+- Left ACT: `cd7385c4-337b-4759-ab32-45d65beaf190`
+
+ENLYZE now returns physical rpm directly (scaling factor 1.0); no division by
+1000 is applied. For 3.739 + 3.956 rpm and 5 m width, the rate is 105.80625 kg/min
+(6348.375 kg/h), giving 17.634375 kg in ten seconds.
+
+For cumulative consumption, transport speed
+`fef41976-1103-4090-b780-eaeecc02fdfa` remains exclusively the production gate:
+speed must be strictly greater than 0.3 m/min. It does not multiply the mass rate.
+For instantaneous application, this same speed is also the denominator. The generic rotational mode also supports omitting
+`gate_signal_ref` and `gate_threshold`, in which case all valid intervals are
+active. Bento retains its gate.
+
+The two old SET sources `19ea65d2-bd35-4d02-89de-4495583d9026` and
+`d9f47615-69cf-4f97-88df-199585764491` are no longer requested by Bento.
+`direct_mass_rate` remains the default for K7; `area_application` remains
+available for other configurations. There is no Bento branch in the integrator.
+
+The previous-value integration, JSON state format and order bootstrap/resume
+remain unchanged. Totals accumulate across disjoint runs, with a new baseline
+at each run boundary, even if the inter-run gap is under 20 seconds. Intervals
+up to 20 seconds use the preceding rate and gate; longer sample gaps and
+unobserved run tails are not integrated. Missing/nonfinite source values reject
+the cycle. Finite negative speeds retain the existing generic signed-rate
+semantics; no clamping is introduced.
+
+Width comes from the existing ERP nominal-width parser, with workplace
+`Bento 1` and order format `Bento 1-{production_order}`. Workplace comparisons
+use `strip().casefold()`; order matching remains strict. Missing/mismatched ERP
+context or an unparseable width rejects the cycle without saving state. The
+current ERP context supplies width for all runs of the same order, assuming
+constant article width. Historical orders no longer in the ERP workplace view
+need a historical width source for replay.
+
+The current factor is **2.75 kg/(rev*m)**, independently derived on
+**2026-09-08** by the **gravimetric tray method**: measured application
+**4068 g/m²**, line speed **2.3 m/min**, actual rotational signals **left 1.65**
+and **right 1.75**. The derivation is `4.068 × 2.3 / (1.65 + 1.75) ≈ 2.75188`,
+rounded to the configured 2.75. This supersedes the earlier 3.12 estimate.
+See [central calibration configuration](material-calibrations.md) for updates
+and persistence semantics.
+
+Tests use realistic rpm values and synthetic samples, including disjoint-run
+bootstrap and persisted resume. They are not a new replay of recorded ENLYZE data.
+
+## Historical migration from SET to rpm: review before execution
+
+The following records the earlier source-model migration, **not a prerequisite
+cleanup for adding these KPIs**. Its deployment observations are historical.
+If the validated rpm model is already deployed, retain its state and snapshots;
+do not execute this historical cleanup for the KPI extension. Recheck deployment
+provenance separately if that earlier migration is still outstanding.
+
+No production state or database rows were changed during this implementation,
+and no service start was requested. The operator reports Bento stopped;
+sandbox systemd access could not independently confirm that state.
+The deployed `/etc/systemd/system/production-analytics-bento1.service` specifies
+`/opt/git-projects/production-analytics/data/state/material` as its state directory.
+
+The existing state file for machine `5f42a4f6-9ca0-4f6f-9786-40d50a35b230`
+and order `Bento 1-12026000857` is exactly:
+
+```text
+/opt/git-projects/production-analytics/data/state/material/4d6cc209e35bc58887e5b4a3816835006425429e810e0d957f651971723e8c2f.json
+```
+
+This identity was verified using the store's SHA-256 of the JSON machine/order
+pair. The file exists but its contents are not readable by the sandbox user.
+The other state file, `6d11088159b8e4fd21543560a54a31a0f86faf22bbf8f16873b228d1903c23f9.json`,
+has not been attributed here and must be left untouched.
+
+Old PostgreSQL snapshots are in `material_consumption_snapshots`, scoped by both
+`calculation_id = 'bento1-fresh-bentonite-consumption'` and
+`machine_id = '5f42a4f6-9ca0-4f6f-9786-40d50a35b230'`.
+The table has no calculation-source/version provenance column. Given the stopped
+service and no rpm deployment yet, existing rows in this scope belong to the old
+calculation. PostgreSQL was unreachable from the sandbox, so exact row counts,
+order/run membership and timestamp bounds remain unverified. Do not mistake
+this predicate for a completed row inventory. Review the following output first.
+
+Run these **read-only inventory commands** on the deployment host:
+
+```sh
+cd /opt/git-projects/production-analytics
+sudo systemctl is-active production-analytics-bento1.service
+sudo cat data/state/material/4d6cc209e35bc58887e5b4a3816835006425429e810e0d957f651971723e8c2f.json
+sudo docker compose exec -T timescaledb psql -U production_analytics -d production_analytics -v ON_ERROR_STOP=1 <<'SQL'
+BEGIN READ ONLY;
+SELECT production_order, run_id, count(*) AS rows,
+       min(timestamp) AS first_snapshot, max(timestamp) AS last_snapshot,
+       min(consumption_kg), max(consumption_kg)
+FROM material_consumption_snapshots
+WHERE calculation_id = 'bento1-fresh-bentonite-consumption'
+  AND machine_id = '5f42a4f6-9ca0-4f6f-9786-40d50a35b230'
+GROUP BY production_order, run_id ORDER BY first_snapshot;
+SELECT * FROM material_consumption_snapshots
+WHERE calculation_id = 'bento1-fresh-bentonite-consumption'
+  AND machine_id = '5f42a4f6-9ca0-4f6f-9786-40d50a35b230'
+ORDER BY production_order, timestamp;
+COMMIT;
+SQL
+```
+
+After reviewing the inventory, and **only with cleanup authorization**, keep the
+service stopped and execute this backup-and-delete transaction. The backup table
+intentionally has no `IF NOT EXISTS`: a repeated invocation fails rather than
+reusing an older backup. Only rows with the backed-up primary keys are deleted.
+K7 rows are outside the predicate.
+
+```sh
+cd /opt/git-projects/production-analytics
+sudo docker compose exec -T timescaledb psql -U production_analytics -d production_analytics -v ON_ERROR_STOP=1 <<'SQL'
+BEGIN;
+CREATE TABLE bento1_material_snapshots_before_rpm_20260907 AS
+SELECT * FROM material_consumption_snapshots
+WHERE calculation_id = 'bento1-fresh-bentonite-consumption'
+  AND machine_id = '5f42a4f6-9ca0-4f6f-9786-40d50a35b230';
+DELETE FROM material_consumption_snapshots AS s
+USING bento1_material_snapshots_before_rpm_20260907 AS old
+WHERE s.calculation_id = old.calculation_id AND s.machine_id = old.machine_id
+  AND s.production_order = old.production_order AND s.timestamp = old.timestamp;
+COMMIT;
+SQL
+sudo mv -n -- \
+  data/state/material/4d6cc209e35bc58887e5b4a3816835006425429e810e0d957f651971723e8c2f.json \
+  data/state/material/4d6cc209e35bc58887e5b4a3816835006425429e810e0d957f651971723e8c2f.json.before-rpm-20260907
+```
+
+Verify the original JSON path is absent before restarting; `mv -n` preserves an
+existing backup and will not overwrite it. If inventory reveals other Bento
+orders, derive their paths with `JsonMaterialStateStore._path(machine, order)`
+and review any existing files before moving them too. Do not clear the shared
+directory. Complete both state and snapshot cleanup before starting the new
+code: the state schema deliberately does not detect a changed source model.
+
+A later start bootstraps only the currently open order using its current ERP
+width. It does not automatically rebuild snapshots for closed historical
+orders. Reconstructing those requires a separately reviewed historical replay.

docs/material-calibrations.md

@@ -0,0 +1,73 @@
+# Material calibrations
+
+Process calibration values live in the version-controlled
+`config/material-calibrations.yaml`. Calculations refer to opaque IDs; IDs have
+no special meaning to the parser. The current entry is:
+
+```yaml
+calibrations:
+  bento1-spreader-1-2:
+    type: rotational_discharge
+    value: 2.75
+    unit: kg_per_rev_m
+    calibrated_at: 2026-09-08
+    method: gravimetric_tray
+    description: Bento 1 fresh-bentonite spreaders 1 and 2
+    reference:
+      measured_application_g_m2: 4068
+      line_speed_m_min: 2.3
+      signal_values:
+        left: 1.65
+        right: 1.75
+```
+
+All entry fields are required. Type, unit, method and description are non-empty
+strings; value must be a finite number (booleans are rejected); calibrated_at is
+a calendar date in YYYY-MM-DD format, quoted or unquoted. Reference is a non-empty
+mapping whose contents preserve source-specific measurement provenance. Unknown
+entry fields and duplicate YAML keys are rejected. The generic registry permits
+other types and units; each consuming calculation checks its own compatibility.
+
+`config/bento1-material-consumption.yaml` contains
+`calibration_ref: bento1-spreader-1-2`. During configuration loading, references
+resolve from `material-calibrations.yaml` in the calculation file's directory,
+independently of the working directory. The entire registry is validated when a
+reference is used. Rotational discharge requires type `rotational_discharge`,
+unit `kg_per_rev_m` and a positive value. Resolution supplies the existing
+`specific_discharge_kg_per_rev_m` runtime field for both application and
+consumption; the calculation algorithms are unchanged. There is no unit conversion.
+
+Missing/unreadable files, missing IDs, invalid metadata and incompatible type or
+unit raise `CalculationConfigError` before a runner starts. Existing direct numeric
+configurations remain supported; specifying both a reference and a direct factor
+is rejected. References are currently supported by rotational discharge consumers.
+K7 uses direct mass rate and does not load or require a calibration file.
+
+## Updating a calibration
+
+After a physical measurement, edit only the central entry's value, date, method
+and reference details, and keep its ID stable. Review and version-control the
+change. Additional machines can add new IDs using the same structure. A new
+calculation type needs an explicit consumer compatibility contract.
+
+Ship the central YAML alongside the calculation YAML and restart the consuming
+process to load changes. No new CLI flag, environment variable, database migration
+or UI is required. There is no hot reload or historical date-based selection.
+Changes affect future calculations and explicitly rebuilt calculations. Historical
+persisted snapshots are **not automatically recalculated**. Existing checkpoints
+retain accumulated totals, so subsequent increments use the newly loaded factor;
+a complete historical rebuild requires a separately planned replay. Persisted
+snapshots do not gain calibration-version provenance through this change.
+
+## Current Bento provenance
+
+On 2026-09-08, an independent gravimetric tray measurement found 4068 g/m² at
+2.3 m/min with actual rotational signals left 1.65 and right 1.75.
+`(4068 / 1000) × 2.3 / (1.65 + 1.75) ≈ 2.75188 kg/(rev*m)` gives the configured
+rounded factor **2.75 kg/(rev*m)**. The original measurement remains recorded,
+without fitting or adjusting the runtime value to reproduce it exactly.
+
+Only fresh-bentonite spreaders 1 and 2 are included. Before adding spreader 3,
+confirm its material scope, actual signal units, independent calibration and
+whether its output belongs in the fresh-material KPIs. No spreader 3 support is
+included here.

docs/roadmap.md

@@ -13,7 +13,23 @@ Exploration established a K7 candidate mass-flow signal and speed gate; the
 evidence and remaining uncertainties are recorded in `docs/enlyze-api.md`.
 Continue to record sanitized fixtures for newly verified semantics.
 
-## 2. Live material-consumption MVP (next implementation milestone)
+## 2. Live material-consumption MVP (in progress)
+
+The integration engine, ENLYZE gateway, single-cycle polling service, atomic
+JSON checkpoint store, and configured continuous foreground polling runner are
+implemented and covered by synthetic tests. Configure the validated K7 instance
+in `config/k7-material-consumption.yaml`; start it with
+`production-analytics run material-poll --config config/k7-material-consumption.yaml`.
+Runtime options select the polling interval, state directory (default: ignored
+`data/state/material/`), and existing secrets-file handling. Only one writer may
+poll each machine/order state key.
+
+The runner now persists cumulative material-consumption snapshots for Grafana in
+PostgreSQL using `db/schema.sql`. JSON remains the restart checkpoint; PostgreSQL
+stores derived time-series snapshots only. No Timescale-specific features are used.
+A new order may first appear with a non-zero total after initial sample integration.
+Grafana dashboard validation remains pending. No HTTP endpoints, application
+containers, daemonization, or schedulers have been added.
 
 Detect the currently active Production Run and production order, continuously
 ingest new ENLYZE samples, maintain persistent incremental integration state,

pyproject.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 license = { text = "Proprietary" }
 authors = [{ name = "Production Analytics Team" }]
-dependencies = []
+dependencies = ["PyYAML>=6.0", "psycopg[binary]>=3.2,<4", "pymssql>=2.4.0,<3"]
 
 [project.optional-dependencies]
 dev = [

src/production_analytics/calculations/calibrations.py

@@ -0,0 +1,89 @@
+"""Generic, version-controlled calibration values and measurement provenance."""
+
+from dataclasses import dataclass
+from datetime import date
+from pathlib import Path
+from typing import Any
+
+import yaml
+
+from production_analytics.calculations.config import (
+    CalculationConfigError,
+    _UniqueLoader,
+    finite_number,
+)
+
+
+@dataclass(frozen=True, slots=True)
+class Calibration:
+    type: str
+    value: float
+    unit: str
+    calibrated_at: date
+    method: str
+    description: str
+    reference: dict[str, Any]
+
+
+def load_calibrations(path: str | Path) -> dict[str, Calibration]:
+    """Validate every entry, retaining opaque IDs and free-form reference metadata."""
+    try:
+        with Path(path).open(encoding="utf-8") as stream:
+            document = yaml.load(stream, Loader=_UniqueLoader)
+    except (OSError, UnicodeError) as exc:
+        raise CalculationConfigError(f"Cannot read calibration configuration: {path}") from exc
+    except yaml.YAMLError as exc:
+        raise CalculationConfigError(f"Invalid YAML in calibration configuration: {path}") from exc
+    if not isinstance(document, dict) or set(document) != {"calibrations"}:
+        raise CalculationConfigError("Calibration configuration must contain only 'calibrations'")
+    entries = document["calibrations"]
+    if not isinstance(entries, dict) or not entries:
+        raise CalculationConfigError("calibrations must be a non-empty mapping")
+    result = {}
+    required = {"type", "value", "unit", "calibrated_at", "method", "description", "reference"}
+    for identifier, entry in entries.items():
+        prefix = f"calibrations[{identifier!r}]"
+        if not identifier.strip():
+            raise CalculationConfigError("Calibration IDs must be non-empty strings")
+        if not isinstance(entry, dict) or set(entry) != required:
+            raise CalculationConfigError(
+                f"{prefix}: required fields are {', '.join(sorted(required))}"
+            )
+        for name in ("type", "unit", "method", "description"):
+            if not isinstance(entry[name], str) or not entry[name].strip():
+                raise CalculationConfigError(f"{prefix}.{name} must be a non-empty string")
+        calibrated_at = entry["calibrated_at"]
+        if isinstance(calibrated_at, str):
+            try:
+                parsed = date.fromisoformat(calibrated_at)
+                if parsed.isoformat() != calibrated_at:
+                    raise ValueError
+                calibrated_at = parsed
+            except ValueError as exc:
+                raise CalculationConfigError(f"{prefix}.calibrated_at must be YYYY-MM-DD") from exc
+        if type(calibrated_at) is not date:
+            raise CalculationConfigError(f"{prefix}.calibrated_at must be YYYY-MM-DD")
+        if not isinstance(entry["reference"], dict) or not entry["reference"]:
+            raise CalculationConfigError(f"{prefix}.reference must be a non-empty mapping")
+        result[identifier] = Calibration(
+            **{**entry, "calibrated_at": calibrated_at,
+               "value": finite_number(entry["value"], f"{prefix}.value")},
+        )
+    return result
+
+
+def resolve_calibration(
+    calibrations: dict[str, Calibration], reference: str, *, expected_type: str, expected_unit: str,
+) -> Calibration:
+    """Require explicit compatibility; no implicit conversion or ID interpretation."""
+    if not isinstance(reference, str) or not reference.strip():
+        raise CalculationConfigError("calibration_ref must be a non-empty string")
+    if reference not in calibrations:
+        raise CalculationConfigError(f"Missing calibration ID: {reference!r}")
+    calibration = calibrations[reference]
+    for field, expected in (("type", expected_type), ("unit", expected_unit)):
+        if getattr(calibration, field) != expected:
+            raise CalculationConfigError(
+                f"Calibration {reference!r}: incompatible {field}; expected {expected!r}"
+            )
+    return calibration

src/production_analytics/calculations/config.py

@@ -0,0 +1,203 @@
+"""Strict configuration for executable material-consumption instances."""
+
+from dataclasses import MISSING, dataclass, fields
+from math import isfinite
+from pathlib import Path
+
+import yaml
+
+
+class CalculationConfigError(ValueError):
+    """An operator-readable configuration failure, without input values."""
+
+
+class _UniqueLoader(yaml.SafeLoader):
+    pass
+
+
+def _mapping(loader, node):
+    result = {}
+    for key_node, value_node in node.value:
+        key = loader.construct_object(key_node)
+        if not isinstance(key, str) or key in result:
+            raise CalculationConfigError("YAML mapping keys must be unique strings")
+        result[key] = loader.construct_object(value_node)
+    return result
+
+
+_UniqueLoader.add_constructor(yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG, _mapping)
+
+
+def finite_number(value: object, name: str, *, positive: bool = False) -> float:
+    if isinstance(value, bool) or not isinstance(value, (int, float)):
+        raise CalculationConfigError(f"{name} must be a finite number")
+    try:
+        number = float(value)
+    except (OverflowError, ValueError) as exc:
+        raise CalculationConfigError(f"{name} must be a finite number") from exc
+    if not isfinite(number) or (positive and number <= 0):
+        requirement = "finite and greater than zero" if positive else "finite"
+        raise CalculationConfigError(f"{name} must be {requirement}")
+    return number
+
+
+@dataclass(frozen=True, slots=True)
+class MaterialCalculationConfig:
+    id: str
+    type: str
+    version: str
+    machine_ref: str
+    rate_signal_ref: str
+    gate_signal_ref: str | None
+    gate_threshold: float
+    max_sample_gap_seconds: float
+    output_metric: str
+    output_unit: str
+    group_by: str
+    source_mode: str = "direct_mass_rate"
+    application_signal_refs: tuple[str, ...] = ()
+    rotational_speed_signal_refs: tuple[str, ...] = ()
+    specific_discharge_kg_per_rev_m: float | None = None
+    calibration_ref: str | None = None
+    erp_workplace: str = ""
+    production_order_format: str = ""
+    process_application_calculation_id: str | None = None
+
+
+def load_material_calculation(
+    path: str | Path, calculation_id: str | None = None,
+) -> MaterialCalculationConfig:
+    try:
+        with Path(path).open(encoding="utf-8") as stream:
+            document = yaml.load(stream, Loader=_UniqueLoader)
+    except (OSError, UnicodeError) as exc:
+        raise CalculationConfigError("Cannot read calculation configuration file") from exc
+    except yaml.YAMLError as exc:
+        raise CalculationConfigError("Invalid YAML in calculation configuration") from exc
+    if not isinstance(document, dict) or set(document) != {"calculations"}:
+        raise CalculationConfigError("Configuration must contain only 'calculations'")
+    entries = document["calculations"]
+    if not isinstance(entries, list) or not entries:
+        raise CalculationConfigError("calculations must be a non-empty list")
+    allowed = {field.name for field in fields(MaterialCalculationConfig)}
+    required = {field.name for field in fields(MaterialCalculationConfig)
+                if field.default is MISSING}
+    instances = {}
+    calibrations = None
+    for index, entry in enumerate(entries):
+        prefix = f"calculations[{index}]"
+        if not isinstance(entry, dict):
+            raise CalculationConfigError(f"{prefix} must be a mapping")
+        if "type" in entry and entry["type"] != "material_consumption":
+            raise CalculationConfigError(f"{prefix}.type: only 'material_consumption' is supported")
+        area = entry.get("source_mode", "direct_mass_rate") == "area_application"
+        rotational = entry.get("source_mode") == "rotational_discharge"
+        if rotational:
+            entry.setdefault("gate_signal_ref", None)
+            entry.setdefault("gate_threshold", 0.0)
+        if area or rotational:
+            entry.setdefault("rate_signal_ref", "unused")
+        missing = required - entry.keys()
+        if missing:
+            raise CalculationConfigError(f"{prefix}: missing fields: {', '.join(sorted(missing))}")
+        if entry.keys() - allowed:
+            raise CalculationConfigError(f"{prefix}: unknown fields (check spelling)")
+        for name in sorted(required - {"gate_threshold", "max_sample_gap_seconds"}):
+            if name == "gate_signal_ref" and rotational and entry[name] is None:
+                continue
+            if not isinstance(entry[name], str) or not entry[name].strip():
+                raise CalculationConfigError(f"{prefix}.{name} must be a non-empty string")
+        for name, expected in (
+            ("type", "material_consumption"), ("version", "1"),
+            ("output_metric", "material_consumption"), ("output_unit", "kg"),
+            ("group_by", "production_order"),
+        ):
+            if entry[name] != expected:
+                raise CalculationConfigError(f"{prefix}.{name}: only {expected!r} is supported")
+        entry["gate_threshold"] = finite_number(entry["gate_threshold"], f"{prefix}.gate_threshold")
+        entry["max_sample_gap_seconds"] = finite_number(
+            entry["max_sample_gap_seconds"], f"{prefix}.max_sample_gap_seconds", positive=True,
+        )
+        mode = entry.get("source_mode", "direct_mass_rate")
+        if not isinstance(mode, str) or mode not in {
+            "direct_mass_rate", "area_application", "rotational_discharge",
+        }:
+            raise CalculationConfigError("Unsupported material source_mode")
+        if area or rotational:
+            refs_name = "rotational_speed_signal_refs" if rotational else "application_signal_refs"
+            other = "application_signal_refs" if rotational else "rotational_speed_signal_refs"
+            if other in entry:
+                raise CalculationConfigError(f"{mode} cannot specify {other}")
+            refs = entry.get(refs_name)
+            if (not isinstance(refs, list) or not refs
+                    or any(not isinstance(ref, str) or not ref.strip() for ref in refs)
+                    or len(set(refs)) != len(refs)):
+                raise CalculationConfigError(
+                    f"{refs_name} must be unique signal strings"
+                )
+            if entry["rate_signal_ref"] != "unused":
+                raise CalculationConfigError(f"{mode} cannot specify rate_signal_ref")
+            for name in ("erp_workplace", "production_order_format"):
+                if not isinstance(entry.get(name), str) or not entry[name].strip():
+                    raise CalculationConfigError(f"{mode} requires {name}")
+            from production_analytics.context import build_enlyze_production_order
+            try:
+                build_enlyze_production_order("0", entry["production_order_format"])
+            except ValueError as exc:
+                raise CalculationConfigError("Invalid production_order_format") from exc
+            entry[refs_name] = tuple(refs)
+        elif any(name in entry for name in (
+            "application_signal_refs", "rotational_speed_signal_refs",
+            "erp_workplace", "production_order_format",
+        )):
+            raise CalculationConfigError("Width context fields require a width-based source mode")
+        if "calibration_ref" in entry:
+            if not rotational:
+                raise CalculationConfigError("calibration_ref requires rotational_discharge")
+            if "specific_discharge_kg_per_rev_m" in entry:
+                raise CalculationConfigError(
+                    "Specify calibration_ref or direct specific discharge, not both"
+                )
+            from production_analytics.calculations.calibrations import (
+                load_calibrations,
+                resolve_calibration,
+            )
+            if calibrations is None:
+                calibrations = load_calibrations(Path(path).parent / "material-calibrations.yaml")
+            calibration = resolve_calibration(
+                calibrations, entry["calibration_ref"],
+                expected_type="rotational_discharge", expected_unit="kg_per_rev_m",
+            )
+            entry["specific_discharge_kg_per_rev_m"] = calibration.value
+        if rotational:
+            entry["specific_discharge_kg_per_rev_m"] = finite_number(
+                entry.get("specific_discharge_kg_per_rev_m"),
+                "specific_discharge_kg_per_rev_m", positive=True,
+            )
+        elif "specific_discharge_kg_per_rev_m" in entry:
+            raise CalculationConfigError("Specific discharge requires rotational_discharge")
+        if "process_application_calculation_id" in entry:
+            process_id = entry["process_application_calculation_id"]
+            if (not isinstance(process_id, str) or not process_id.strip()
+                    or "\x00" in process_id or process_id == entry["id"]):
+                raise CalculationConfigError(
+                    "process application ID must be a distinct non-empty string"
+                )
+            if not rotational or not entry["gate_signal_ref"] or entry["gate_threshold"] <= 0:
+                raise CalculationConfigError(
+                    "Process application requires rotational_discharge and a positive speed gate"
+                )
+        if entry["id"] in instances:
+            raise CalculationConfigError("Calculation ids must be unique")
+        instances[entry["id"]] = MaterialCalculationConfig(**entry)
+    process_ids = [c.process_application_calculation_id for c in instances.values()
+                   if c.process_application_calculation_id is not None]
+    if len(set(process_ids)) != len(process_ids) or set(process_ids) & instances.keys():
+        raise CalculationConfigError("Calculation ids must be unique across all outputs")
+    if calculation_id is not None:
+        if calculation_id not in instances:
+            raise CalculationConfigError("Requested calculation id was not found")
+        return instances[calculation_id]
+    if len(instances) != 1:
+        raise CalculationConfigError("Multiple calculations: specify --calculation-id")
+    return next(iter(instances.values()))

src/production_analytics/calculations/material_application.py

@@ -0,0 +1,25 @@
+"""Width-independent process application from actual rotational speeds."""
+
+from collections.abc import Iterable
+from math import isfinite
+
+
+def rotational_application_g_m2(
+    rotational_speeds_rpm: Iterable[float], specific_discharge_kg_per_rev_m: float,
+    line_speed_m_min: float, gate_threshold: float,
+) -> float | None:
+    speeds = tuple(rotational_speeds_rpm)
+    if not speeds or not all(isfinite(value) for value in speeds):
+        raise ValueError("rotational speeds must be non-empty and finite")
+    if not isfinite(specific_discharge_kg_per_rev_m) or specific_discharge_kg_per_rev_m <= 0:
+        raise ValueError("specific discharge must be finite and positive")
+    if not isfinite(gate_threshold) or gate_threshold <= 0:
+        raise ValueError("speed gate threshold must be finite and positive")
+    if not isfinite(line_speed_m_min):
+        raise ValueError("line speed must be finite")
+    if line_speed_m_min <= gate_threshold:
+        return None
+    value = sum(speeds) * specific_discharge_kg_per_rev_m * 1000 / line_speed_m_min
+    if not isfinite(value):
+        raise ValueError("derived application must be finite")
+    return value

src/production_analytics/calculations/material_consumption.py

@@ -13,6 +13,7 @@ class MaterialSample:
     timestamp: datetime
     material_rate_kg_per_hour: float
     gate_value: float
+    application_g_m2: float | None = None
 
 
 @dataclass(frozen=True, slots=True)
@@ -102,3 +103,38 @@ class MaterialConsumptionIntegrator:
         for sample in samples:
             self.process(sample)
         return self.state
+
+
+def area_application_rate_kg_per_hour(
+    applications_g_m2: Iterable[float], nominal_width_m: float, line_speed_m_min: float,
+) -> float:
+    """Normalize summed area application to the integrator's canonical kg/h."""
+    applications = tuple(applications_g_m2)
+    if not applications or not all(isfinite(value) for value in applications):
+        raise ValueError("application values must be non-empty and finite")
+    if not isfinite(nominal_width_m) or nominal_width_m <= 0:
+        raise ValueError("nominal width must be finite and positive")
+    if not isfinite(line_speed_m_min):
+        raise ValueError("line speed must be finite")
+    rate = sum(applications) * nominal_width_m * line_speed_m_min * 60 / 1000
+    if not isfinite(rate):
+        raise ValueError("derived material rate must be finite")
+    return rate
+
+
+def rotational_discharge_rate_kg_per_hour(
+    rotational_speeds_rpm: Iterable[float], nominal_width_m: float,
+    specific_discharge_kg_per_rev_m: float,
+) -> float:
+    """Convert full-width roll speeds and specific discharge to canonical kg/h."""
+    speeds = tuple(rotational_speeds_rpm)
+    if not speeds or not all(isfinite(value) for value in speeds):
+        raise ValueError("rotational speeds must be non-empty and finite")
+    if not isfinite(nominal_width_m) or nominal_width_m <= 0:
+        raise ValueError("nominal width must be finite and positive")
+    if not isfinite(specific_discharge_kg_per_rev_m) or specific_discharge_kg_per_rev_m <= 0:
+        raise ValueError("specific discharge must be finite and positive")
+    rate = sum(speeds) * nominal_width_m * specific_discharge_kg_per_rev_m * 60
+    if not isfinite(rate):
+        raise ValueError("derived material rate must be finite")
+    return rate

src/production_analytics/calculations/material_state.py

@@ -1,6 +1,7 @@
 """Serialization helpers for persistent material-integration state."""
 
 from datetime import UTC, datetime
+from math import isfinite
 
 from production_analytics.calculations.material_consumption import (
     MaterialIntegrationState,
@@ -9,6 +10,11 @@ from production_analytics.calculations.material_consumption import (
 
 def material_state_to_dict(state: MaterialIntegrationState) -> dict[str, object]:
     """Convert integration state to a JSON-serializable dictionary."""
+    if state.last_processed_timestamp is not None and (
+        state.last_processed_timestamp.tzinfo is None
+        or state.last_processed_timestamp.utcoffset() is None
+    ):
+        raise ValueError("last_processed_timestamp must be timezone-aware")
     return {
         "cumulative_consumption_kg": state.cumulative_consumption_kg,
         "integrated_running_seconds": state.integrated_running_seconds,
@@ -25,7 +31,33 @@ def material_state_to_dict(state: MaterialIntegrationState) -> dict[str, object]
 
 def material_state_from_dict(data: dict[str, object]) -> MaterialIntegrationState:
     """Restore integration state from a JSON-compatible dictionary."""
+    if not isinstance(data, dict):
+        raise ValueError("integration_state must be an object")
+    for key in (
+        "cumulative_consumption_kg", "integrated_running_seconds",
+        "last_material_rate_kg_per_hour", "last_gate_value",
+    ):
+        value = data[key]
+        if value is None and key.startswith("last_"):
+            continue
+        if isinstance(value, bool) or not isinstance(value, (int, float)) or not isfinite(value):
+            raise ValueError(f"{key} must be a finite number")
+    if data["integrated_running_seconds"] < 0:
+        raise ValueError("integrated_running_seconds must not be negative")
+    if not isinstance(data["integration_active"], bool):
+        raise ValueError("integration_active must be a boolean")
     raw_timestamp = data["last_processed_timestamp"]
+    if raw_timestamp is not None:
+        if not isinstance(raw_timestamp, str):
+            raise ValueError("last_processed_timestamp must be an ISO timestamp")
+        parsed = datetime.fromisoformat(raw_timestamp)
+        if parsed.tzinfo is None or parsed.utcoffset() is None:
+            raise ValueError("last_processed_timestamp must be timezone-aware")
+    if data["integration_active"] and (
+        raw_timestamp is None or data["last_material_rate_kg_per_hour"] is None
+        or data["last_gate_value"] is None
+    ):
+        raise ValueError("active integration requires a complete temporal baseline")
 
     timestamp = (
         datetime.fromisoformat(str(raw_timestamp)).astimezone(UTC)

src/production_analytics/cli/__main__.py

@@ -1,4 +1,4 @@
-"""Command-line entry point for safe, read-only API exploration."""
+"""Command-line entry point for exploration and production polling."""
 
 from __future__ import annotations
 
@@ -37,10 +37,18 @@ def _parser() -> argparse.ArgumentParser:
     raw.add_argument("--query", action="append", type=_query_item, default=[], metavar="KEY=VALUE")
     raw.add_argument("--pretty", action="store_true", help="Pretty-print sanitized JSON")
     raw.add_argument("--verbose", action="store_true", help="Show safe request progress on stderr")
-    raw.add_argument("--save-fixture", metavar="NAME", help="Save sanitized JSON under fixtures/enlyze/")
+    raw.add_argument(
-    raw.add_argument("--save-raw", metavar="NAME", help="Save unmodified response under ignored data/raw/enlyze/")
+        "--save-fixture", metavar="NAME", help="Save sanitized JSON under fixtures/enlyze/"
-    raw.add_argument("--fixture-dir", type=Path, default=Path("fixtures/enlyze"), help=argparse.SUPPRESS)
+    )
-    raw.add_argument("--raw-dir", type=Path, default=Path("data/raw/enlyze"), help=argparse.SUPPRESS)
+    raw.add_argument(
+        "--save-raw", metavar="NAME", help="Save unmodified response under ignored data/raw/enlyze/"
+    )
+    raw.add_argument(
+        "--fixture-dir", type=Path, default=Path("fixtures/enlyze"), help=argparse.SUPPRESS
+    )
+    raw.add_argument(
+        "--raw-dir", type=Path, default=Path("data/raw/enlyze"), help=argparse.SUPPRESS
+    )
     raw.add_argument(
         "--secrets-file",
         type=Path,
@@ -52,24 +60,63 @@ def _parser() -> argparse.ArgumentParser:
     timeseries.add_argument("--start", required=True, help="ISO 8601 datetime with timezone")
     timeseries.add_argument("--end", required=True, help="ISO 8601 datetime with timezone")
     timeseries.add_argument("--variable", required=True, help="Variable UUID")
-    timeseries.add_argument("--resampling-interval", type=int, help="Seconds; schema range is 10..604800")
+    timeseries.add_argument(
+        "--resampling-interval", type=int, help="Seconds; schema range is 10..604800"
+    )
     timeseries.add_argument(
         "--resampling-method",
-        choices=["first", "last", "max", "min", "count", "sum", "avg", "median", "std", "q5", "q25", "q75", "q95"],
+        choices=[
+            "first",
+            "last",
+            "max",
+            "min",
+            "count",
+            "sum",
+            "avg",
+            "median",
+            "std",
+            "q5",
+            "q25",
+            "q75",
+            "q95",
+        ],
         help="Optional schema-defined method for this variable",
     )
     timeseries.add_argument("--pretty", action="store_true", help="Pretty-print sanitized JSON")
-    timeseries.add_argument("--verbose", action="store_true", help="Show safe request progress on stderr")
+    timeseries.add_argument(
-    timeseries.add_argument("--save-fixture", metavar="NAME", help="Save sanitized JSON under fixtures/enlyze/")
+        "--verbose", action="store_true", help="Show safe request progress on stderr"
-    timeseries.add_argument("--save-raw", metavar="NAME", help="Save unmodified response under ignored data/raw/enlyze/")
+    )
-    timeseries.add_argument("--fixture-dir", type=Path, default=Path("fixtures/enlyze"), help=argparse.SUPPRESS)
+    timeseries.add_argument(
-    timeseries.add_argument("--raw-dir", type=Path, default=Path("data/raw/enlyze"), help=argparse.SUPPRESS)
+        "--save-fixture", metavar="NAME", help="Save sanitized JSON under fixtures/enlyze/"
+    )
+    timeseries.add_argument(
+        "--save-raw", metavar="NAME", help="Save unmodified response under ignored data/raw/enlyze/"
+    )
+    timeseries.add_argument(
+        "--fixture-dir", type=Path, default=Path("fixtures/enlyze"), help=argparse.SUPPRESS
+    )
+    timeseries.add_argument(
+        "--raw-dir", type=Path, default=Path("data/raw/enlyze"), help=argparse.SUPPRESS
+    )
     timeseries.add_argument(
         "--secrets-file",
         type=Path,
         default=Path("secrets/enlyze.env"),
         help="Local dotenv-style secret file (default: secrets/enlyze.env)",
     )
+    run = namespaces.add_parser("run", help="Foreground production runners")
+    runners = run.add_subparsers(dest="command", required=True)
+    material = runners.add_parser("material-poll", help="Continuously poll material consumption")
+    material.add_argument("--config", type=Path, required=True)
+    material.add_argument("--calculation-id")
+    material.add_argument("--poll-interval-seconds", type=float, default=10.0)
+    material.add_argument("--state-directory", type=Path, default=Path("data/state/material"))
+    material.add_argument("--secrets-file", type=Path, default=Path("secrets/enlyze.env"))
+    material.add_argument("--erp-secrets-file", type=Path, default=Path("secrets/erp.env"))
+    efficiency = runners.add_parser("material-efficiency", help="Persist ERP feedback KPI points")
+    efficiency.add_argument("--config", type=Path, required=True)
+    efficiency.add_argument("--secrets-file", type=Path, default=Path("secrets/enlyze.env"))
+    efficiency.add_argument("--erp-secrets-file", type=Path, default=Path("secrets/erp.env"))
     return parser
 
 
@@ -83,8 +130,65 @@ def _write_fixture(directory: Path, name: str, payload: object) -> Path:
     return destination
 
 
+def _run_material(args: argparse.Namespace) -> int:
+    from production_analytics.calculations.config import (
+        CalculationConfigError,
+        load_material_calculation,
+    )
+    from production_analytics.enlyze.exploration import ConfigurationError
+    from production_analytics.service.material_runtime import build_material_runner
+
+    try:
+        calculation = load_material_calculation(args.config, args.calculation_id)
+        runner = build_material_runner(
+            calculation,
+            poll_interval_seconds=args.poll_interval_seconds,
+            state_directory=args.state_directory,
+            erp_secrets_file=args.erp_secrets_file,
+            secrets_file=args.secrets_file,
+        )
+        runner.run()
+    except (CalculationConfigError, ConfigurationError) as exc:
+        print(f"Config/startup error: {exc}", file=sys.stderr)
+        return 2
+    except Exception as exc:
+        print(f"Startup/runtime error: {type(exc).__name__}", file=sys.stderr)
+        return 1
+    except KeyboardInterrupt:
+        return 0
+    return 0
+
+
+def _run_material_efficiency(args: argparse.Namespace) -> int:
+    from production_analytics.calculations.config import CalculationConfigError
+    from production_analytics.enlyze.exploration import ConfigurationError
+    from production_analytics.service.material_efficiency_runtime import (
+        build_material_efficiency_runner,
+    )
+
+    try:
+        build_material_efficiency_runner(
+            args.config,
+            secrets_file=args.secrets_file,
+            erp_secrets_file=args.erp_secrets_file,
+        ).run()
+    except (CalculationConfigError, ConfigurationError) as exc:
+        print(f"Config/startup error: {exc}", file=sys.stderr)
+        return 2
+    except Exception as exc:
+        print(f"Startup/runtime error: {type(exc).__name__}", file=sys.stderr)
+        return 1
+    except KeyboardInterrupt:
+        return 0
+    return 0
+
+
 def main(argv: Sequence[str] | None = None) -> int:
     args = _parser().parse_args(argv)
+    if args.namespace == "run":
+        if args.command == "material-efficiency":
+            return _run_material_efficiency(args)
+        return _run_material(args)
     if args.namespace != "enlyze" or args.command not in {"raw", "timeseries"}:
         return 2
 
@@ -97,7 +201,8 @@ def main(argv: Sequence[str] | None = None) -> int:
             operation = "GET" if args.command == "raw" else "POST"
             target = args.path if args.command == "raw" else "/v2/timeseries"
             print(
-                f"Requesting {operation} {target} (timeout={settings.timeout_seconds:g}s; authentication {authentication}).",
+                f"Requesting {operation} {target} (timeout={settings.timeout_seconds:g}s; "
+                f"authentication {authentication}).",
                 file=sys.stderr,
             )
         client = ExplorationClient(settings)
@@ -105,8 +210,13 @@ def main(argv: Sequence[str] | None = None) -> int:
             response = client.get(args.path, dict(args.query))
             request = {"method": "GET", "path": response.path}
         else:
-            if args.resampling_interval is not None and not 10 <= args.resampling_interval <= 604800:
+            if (
-                raise ExplorationError("--resampling-interval must be between 10 and 604800 seconds.")
+                args.resampling_interval is not None
+                and not 10 <= args.resampling_interval <= 604800
+            ):
+                raise ExplorationError(
+                    "--resampling-interval must be between 10 and 604800 seconds."
+                )
             variable: dict[str, str] = {"uuid": args.variable}
             if args.resampling_method:
                 variable["resampling_method"] = args.resampling_method
@@ -134,9 +244,15 @@ def main(argv: Sequence[str] | None = None) -> int:
         indent = 2 if args.pretty or args.save_fixture else None
         print(json.dumps(payload, indent=indent, sort_keys=True))
         if args.save_fixture:
-            print(f"Sanitized fixture written to {_write_fixture(args.fixture_dir, args.save_fixture, payload)}")
+            print(
+                "Sanitized fixture written to "
+                f"{_write_fixture(args.fixture_dir, args.save_fixture, payload)}"
+            )
         if args.save_raw:
-            print(f"Raw response written to {_write_fixture(args.raw_dir, args.save_raw, raw_payload)}")
+            print(
+                "Raw response written to "
+                f"{_write_fixture(args.raw_dir, args.save_raw, raw_payload)}"
+            )
     except ExplorationError as error:
         print(f"ENLYZE exploration error: {error}")
         return 1

src/production_analytics/context/__init__.py

@@ -0,0 +1,62 @@
+"""Deterministic ERP context helpers, independent of database and timeseries access."""
+
+import math
+import re
+
+__all__ = ["build_enlyze_production_order", "extract_nominal_width_m"]
+
+# Capture malformed numeric tokens too, so a valid-looking suffix cannot become width.
+_NUMBER_TOKEN = r"[+-]?(?:[0-9]+(?:[.,][0-9]+)*|inf(?:inity)?|nan)(?:[eE][+-]?[0-9]+)?"
+_DIMENSIONS = re.compile(
+    rf"(?<![\w.,+\-/])(?P<width>{_NUMBER_TOKEN})\s*x\s*"
+    rf"(?P<length>{_NUMBER_TOKEN})\s*m(?![\w/²³^])",
+    re.IGNORECASE,
+)
+_PLAIN_NUMBER = re.compile(r"[0-9]+(?:[.,][0-9]+)?")
+
+
+def build_enlyze_production_order(erp_production_order: str, format_template: str) -> str:
+    """Format a single ERP order using explicit caller-supplied configuration.
+
+    The template must contain exactly one literal {production_order} placeholder
+    and no other braces. Outer order whitespace is stripped; the order
+    must otherwise contain ASCII digits only (leading zeros are preserved).
+    This is not a parser for ENLYZE identifiers, combined or otherwise.
+    """
+    order = erp_production_order.strip()
+    if not order or not order.isascii() or not order.isdigit():
+        raise ValueError("ERP production order must be a non-empty ASCII digit string")
+    placeholder = "{production_order}"
+    literal = format_template.replace(placeholder, "")
+    if format_template.count(placeholder) != 1 or "{" in literal or "}" in literal:
+        raise ValueError("Format template must contain exactly one {production_order} placeholder")
+    return format_template.replace(placeholder, order)
+
+
+def extract_nominal_width_m(article_description: str | None) -> float | None:
+    """Read one unambiguous positive '<width> x <length> m' pair from ERP text.
+
+    Decimal comma/point and variable whitespace are supported. Multiple pairs,
+    dimension chains, signed/scientific notation and invalid dimensions fail
+    closed.
+    """
+    if article_description is None:
+        return None
+    matches = list(_DIMENSIONS.finditer(article_description))
+    if len(matches) != 1:
+        return None
+    match = matches[0]
+    # Do not mistake the tail of a three-dimensional expression for a width pair.
+    if re.search(r"[x×]\s*$", article_description[:match.start()], re.IGNORECASE):
+        return None
+    if re.match(r"\s*[x×]", article_description[match.end():], re.IGNORECASE):
+        return None
+    values = []
+    for token in (match["width"], match["length"]):
+        if _PLAIN_NUMBER.fullmatch(token) is None:
+            return None
+        value = float(token.replace(",", "."))
+        if not math.isfinite(value) or value <= 0:
+            return None
+        values.append(value)
+    return values[0]

src/production_analytics/enlyze/gateway.py

@@ -2,8 +2,13 @@
 
 from dataclasses import dataclass
 from datetime import UTC, datetime
+from math import isfinite
 
-from production_analytics.calculations.material_consumption import MaterialSample
+from production_analytics.calculations.material_consumption import (
+    MaterialSample,
+    area_application_rate_kg_per_hour,
+    rotational_discharge_rate_kg_per_hour,
+)
 from production_analytics.enlyze.exploration import ExplorationClient
 
 
@@ -22,68 +27,182 @@ class EnlyzeApiGateway:
         self._client = client
 
     def get_open_production_run(self, machine_id: str) -> EnlyzeProductionRun | None:
-        response = self._client.get(
+        runs = [run for run in self.get_production_runs(machine_id) if run.end is None]
-            "/v2/production-runs",
+        if len(runs) > 1:
-            {"machine": machine_id},
+            raise ValueError(
+                "Invalid production-run response: multiple open Production Runs returned"
             )
+        return runs[0] if runs else None
 
-        for item in response.body.get("data", []):
+    def get_production_runs(self, machine_id: str) -> list[EnlyzeProductionRun]:
-            if item.get("end") is not None:
+        """Retrieve all machine runs, following validated cursor pagination."""
-                continue
+        params = {"machine": machine_id}
-
+        runs = []
-            return EnlyzeProductionRun(
+        followed_cursors: set[str] = set()
-                uuid=str(item["uuid"]),
+        page = 1
-                machine_id=str(item["machine"]),
+        while True:
-                product_id=(
+            response = self._client.get("/v2/production-runs", params)
-                    str(item["product"])
+            try:
-                    if item.get("product") is not None
+                if not isinstance(response.body, dict):
-                    else None
+                    raise ValueError("body must be an object")
-                ),
+                items = response.body["data"]
-                production_order=str(item["production_order"]),
+                if not isinstance(items, list):
-                start=_parse_timestamp(item["start"]),
+                    raise ValueError("data must be a list")
-                end=None,
+                for item in items:
-            )
+                    if not isinstance(item, dict) or "end" not in item:
-
+                        raise ValueError("run must be an object with an end field")
-        return None
+                    for key in ("uuid", "machine", "production_order"):
+                        if not isinstance(item[key], str) or not item[key]:
+                            raise ValueError(f"{key} must be a non-empty string")
+                    if item["machine"] != machine_id:
+                        raise ValueError("run machine does not match requested machine")
+                    start = _parse_timestamp(item["start"])
+                    end = _parse_timestamp(item["end"]) if item["end"] is not None else None
+                    if end is not None and end < start:
+                        raise ValueError("run end must not precede start")
+                    runs.append(EnlyzeProductionRun(
+                        uuid=item["uuid"], machine_id=item["machine"],
+                        product_id=item.get("product"), production_order=item["production_order"],
+                        start=start, end=end,
+                    ))
+                next_cursor = None
+                if "metadata" in response.body:
+                    metadata = response.body["metadata"]
+                    if not isinstance(metadata, dict) or "next_cursor" not in metadata:
+                        raise ValueError("metadata must be an object with a next_cursor field")
+                    next_cursor = metadata["next_cursor"]
+                    if next_cursor is not None and (
+                        not isinstance(next_cursor, str) or not next_cursor
+                    ):
+                        raise ValueError("next_cursor must be null or a non-empty string")
+                if next_cursor is None:
+                    return runs
+                if next_cursor in followed_cursors:
+                    raise ValueError("next_cursor has already been followed")
+                followed_cursors.add(next_cursor)
+                params = {**params, "cursor": next_cursor}
+                page += 1
+            except (KeyError, TypeError, ValueError) as exc:
+                raise ValueError(f"Invalid production-run response on page {page}: {exc}") from exc
 
     def get_material_samples(
         self,
         *,
         machine_id: str,
         rate_variable_id: str,
-        gate_variable_id: str,
+        gate_variable_id: str | None,
         start: datetime,
         end: datetime,
+        application_variable_ids: tuple[str, ...] = (),
+        nominal_width_m: float | None = None,
+        rotational_speed_variable_ids: tuple[str, ...] = (),
+        specific_discharge_kg_per_rev_m: float | None = None,
+        process_application_gate_threshold: float | None = None,
     ) -> list[MaterialSample]:
-        response = self._client.post_json(
+        for name, value in (("start", start), ("end", end)):
-            "/v2/timeseries",
+            if value.tzinfo is None or value.utcoffset() is None:
-            {
+                raise ValueError(f"{name} must be timezone-aware")
+        if end < start:
+            raise ValueError("end must not precede start")
+        if application_variable_ids and rotational_speed_variable_ids:
+            raise ValueError("Material source modes are mutually exclusive")
+        if gate_variable_id is None and not rotational_speed_variable_ids:
+            raise ValueError("This source requires a gate signal")
+        source_ids = (
+            rotational_speed_variable_ids or application_variable_ids or (rate_variable_id,)
+        )
+        gate_ids = (gate_variable_id,) if gate_variable_id else ()
+        variable_ids = list(dict.fromkeys((*source_ids, *gate_ids)))
+        request_body = {
             "machine": machine_id,
             "start": start.astimezone(UTC).isoformat(),
             "end": end.astimezone(UTC).isoformat(),
-                "variables": [
+            "variables": [{"uuid": variable_id} for variable_id in variable_ids],
-                    {"uuid": rate_variable_id},
+        }
-                    {"uuid": gate_variable_id},
+        samples = []
-                ],
+        followed_cursors: set[str] = set()
-            },
+        page = 1
-        )
+        while True:
-
+            response = self._client.post_json("/v2/timeseries", request_body)
+            try:
                 data = response.body["data"]
                 columns = data["columns"]
-
+                if not isinstance(columns, list):
+                    raise ValueError("columns must be a list")
+                for required in ("time", *variable_ids):
+                    if columns.count(required) != 1:
+                        raise ValueError(f"required column {required!r} must occur exactly once")
                 time_index = columns.index("time")
-        rate_index = columns.index(rate_variable_id)
+                source_indices = [columns.index(ref) for ref in source_ids]
-        gate_index = columns.index(gate_variable_id)
+                gate_index = columns.index(gate_variable_id) if gate_variable_id else None
-
+                if not isinstance(data["records"], list):
-        return [
+                    raise ValueError("records must be a list")
-            MaterialSample(
+                for index, record in enumerate(data["records"]):
-                timestamp=_parse_timestamp(record[time_index]),
+                    try:
-                material_rate_kg_per_hour=float(record[rate_index]),
+                        if not isinstance(record, list) or len(record) != len(columns):
-                gate_value=float(record[gate_index]),
+                            raise ValueError("record must match columns")
+                        sources = [record[i] for i in source_indices]
+                        gate = record[gate_index] if gate_index is not None else 1.0
+                        for value in (*sources, gate):
+                            if isinstance(value, bool) or not isinstance(value, (int, float)):
+                                raise ValueError("rate and gate must be numeric")
+                            if not isfinite(value):
+                                raise ValueError("rate and gate must be finite")
+                        if rotational_speed_variable_ids:
+                            if nominal_width_m is None or specific_discharge_kg_per_rev_m is None:
+                                raise ValueError("rotational discharge requires width and factor")
+                            rate = rotational_discharge_rate_kg_per_hour(
+                                sources, nominal_width_m, specific_discharge_kg_per_rev_m,
                             )
-            for record in data["records"]
+                        elif application_variable_ids:
-        ]
+                            if nominal_width_m is None:
+                                raise ValueError("area application requires nominal width")
+                            rate = area_application_rate_kg_per_hour(sources, nominal_width_m, gate)
+                        else:
+                            rate = sources[0]
+                        application = None
+                        if process_application_gate_threshold is not None:
+                            if not rotational_speed_variable_ids or gate_variable_id is None:
+                                raise ValueError("Process application requires rpm and speed gate")
+                            from production_analytics.calculations.material_application import (
+                                rotational_application_g_m2,
+                            )
+                            application = rotational_application_g_m2(
+                                sources, specific_discharge_kg_per_rev_m, gate,
+                                process_application_gate_threshold,
+                            )
+                        samples.append(MaterialSample(
+                            timestamp=_parse_timestamp(record[time_index]),
+                            material_rate_kg_per_hour=float(rate), gate_value=float(gate),
+                            application_g_m2=application,
+                        ))
+                    except (TypeError, ValueError) as exc:
+                        raise ValueError(f"malformed record {index}: {exc}") from exc
+                next_cursor = None
+                if "metadata" in response.body:
+                    metadata = response.body["metadata"]
+                    if not isinstance(metadata, dict) or "next_cursor" not in metadata:
+                        raise ValueError("metadata must be an object with a next_cursor field")
+                    next_cursor = metadata["next_cursor"]
+                    if next_cursor is not None and (
+                        not isinstance(next_cursor, str) or not next_cursor
+                    ):
+                        raise ValueError("next_cursor must be null or a non-empty string")
+                if next_cursor is None:
+                    return samples
+                if next_cursor in followed_cursors:
+                    raise ValueError("next_cursor has already been followed")
+                followed_cursors.add(next_cursor)
+                request_body = {**request_body, "cursor": next_cursor}
+                page += 1
+            except (KeyError, TypeError, ValueError) as exc:
+                raise ValueError(f"Invalid timeseries response on page {page}: {exc}") from exc
 
 
 def _parse_timestamp(value: str) -> datetime:
-    return datetime.fromisoformat(value.replace("Z", "+00:00")).astimezone(UTC)
+    if not isinstance(value, str):
+        raise ValueError("timestamp must be an ISO string")
+    timestamp = datetime.fromisoformat(value.replace("Z", "+00:00"))
+    if timestamp.tzinfo is None or timestamp.utcoffset() is None:
+        raise ValueError("timestamp must be timezone-aware")
+    return timestamp.astimezone(UTC)

src/production_analytics/erp/__init__.py

@@ -0,0 +1,10 @@
+"""Read-only ERP current workplace context."""
+
+from production_analytics.erp.gateway import (
+    CurrentWorkplaceStatus,
+    ErpReadError,
+    ErpSettings,
+    ErpWorkplaceStatusGateway,
+)
+
+__all__ = ["CurrentWorkplaceStatus", "ErpReadError", "ErpSettings", "ErpWorkplaceStatusGateway"]

src/production_analytics/erp/gateway.py

@@ -0,0 +1,148 @@
+"""Focused MSSQL boundary for dbo.GRAFANA_WORKPLACE_STATUS."""
+
+import os
+from collections.abc import Mapping
+from dataclasses import dataclass, field
+from datetime import datetime
+from decimal import Decimal
+from math import isfinite
+
+import pymssql
+
+from production_analytics.enlyze.exploration import ConfigurationError, load_secret_file
+
+
+@dataclass(frozen=True, slots=True)
+class ErpSettings:
+    host: str
+    port: int
+    database: str
+    user: str = field(repr=False)
+    password: str = field(repr=False)
+
+    def __post_init__(self) -> None:
+        for attribute, suffix in (
+            ("host", "HOST"), ("database", "NAME"), ("user", "USER"), ("password", "PASSWORD"),
+        ):
+            value = getattr(self, attribute)
+            if not isinstance(value, str) or not value.strip() or "\x00" in value:
+                raise ConfigurationError(f"ERP_DB_{suffix} must be non-empty without NUL bytes")
+        if type(self.port) is not int or not 1 <= self.port <= 65535:
+            raise ConfigurationError("ERP_DB_PORT must be an integer from 1 to 65535")
+
+    @classmethod
+    def from_environment(cls, environment: Mapping[str, str]) -> "ErpSettings":
+        raw_port = environment.get("ERP_DB_PORT", "")
+        try:
+            if not isinstance(raw_port, str):
+                raise ValueError
+            port = int(raw_port)
+        except ValueError:
+            raise ConfigurationError("ERP_DB_PORT must be an integer from 1 to 65535") from None
+        return cls(
+            host=environment.get("ERP_DB_HOST", ""), port=port,
+            database=environment.get("ERP_DB_NAME", ""),
+            user=environment.get("ERP_DB_USER", ""),
+            password=environment.get("ERP_DB_PASSWORD", ""),
+        )
+
+    @classmethod
+    def from_secret_file(
+        cls, path: str | os.PathLike[str] = "secrets/erp.env",
+        *, environment: Mapping[str, str] | None = None,
+    ) -> "ErpSettings":
+        """Load dotenv values over the environment, following the existing convention."""
+        try:
+            values = load_secret_file(path)
+        except Exception:
+            raise ConfigurationError("ERP secret file could not be loaded") from None
+        base = os.environ if environment is None else environment
+        return cls.from_environment({**base, **values})
+
+
+@dataclass(frozen=True, slots=True)
+class CurrentWorkplaceStatus:
+    """Latest ERP feedback; timestamp and timezone are preserved, with no freshness claim."""
+
+    workplace: str
+    production_order: str
+    article_number: str | None
+    article_description: str | None
+    feedback_timestamp: datetime
+    order_quantity_m2: float | None
+    good_quantity_m2: float | None
+    remaining_quantity_m2: float | None
+    remaining_time_hours: float | None
+    remaining_rolls: float | None
+
+
+class ErpReadError(RuntimeError):
+    """Safe operator-facing ERP read or result error."""
+
+
+_CURRENT_STATUS_SQL = """SELECT
+    [Arbeitsplatz], [Fertigungsauftragsnummer], [Artikelnummer], [Artikelbezeichnung],
+    [Zeitstempel], [Auftragsmenge], [Gutmenge], [Restmenge],
+    [Verbleibende Zeit], [Verbleibende Rollen]
+FROM [dbo].[GRAFANA_WORKPLACE_STATUS]
+WHERE [Arbeitsplatz] = %s"""
+
+
+class ErpWorkplaceStatusGateway:
+    def __init__(self, settings: ErpSettings) -> None:
+        self._settings = settings
+
+    def get_current_workplace_status(self, workplace: str) -> CurrentWorkplaceStatus | None:
+        if not isinstance(workplace, str) or not workplace.strip() or "\x00" in workplace:
+            raise ValueError("workplace must be a non-empty string without NUL bytes")
+        try:
+            with pymssql.connect(
+                server=self._settings.host, port=self._settings.port,
+                database=self._settings.database, user=self._settings.user,
+                password=self._settings.password, login_timeout=10, timeout=10,
+            ) as connection:
+                with connection.cursor() as cursor:
+                    cursor.execute(_CURRENT_STATUS_SQL, (workplace,))
+                    # Two rows suffice to detect a violation without selecting an arbitrary row.
+                    rows = cursor.fetchmany(2)
+        except Exception:
+            # Driver messages may include credentials; suppress their traceback chain too.
+            raise ErpReadError("ERP current workplace status read failed") from None
+        if not rows:
+            return None
+        if len(rows) > 1:
+            raise ErpReadError("ERP current workplace status returned multiple rows")
+        try:
+            row = rows[0]
+            if len(row) != 10 or not isinstance(row[4], datetime):
+                raise ValueError
+            return CurrentWorkplaceStatus(
+                workplace=_text(row[0]), production_order=_text(row[1]),
+                article_number=_text(row[2], nullable=True),
+                article_description=_text(row[3], nullable=True),
+                feedback_timestamp=row[4],
+                order_quantity_m2=_number(row[5]), good_quantity_m2=_number(row[6]),
+                remaining_quantity_m2=_number(row[7]), remaining_time_hours=_number(row[8]),
+                remaining_rolls=_number(row[9]),
+            )
+        except Exception:
+            raise ErpReadError("ERP current workplace status returned an invalid row") from None
+
+
+def _text(value: object, *, nullable: bool = False) -> str | None:
+    if value is None and nullable:
+        return None
+    if not isinstance(value, str):
+        raise ValueError
+    return value.rstrip()
+
+
+def _number(value: object) -> float | None:
+    if value is None:
+        return None
+    if isinstance(value, bool) or not isinstance(value, (Decimal, int, float)):
+        raise ValueError
+    result = float(value)
+    if not isfinite(result):
+        raise ValueError
+    return result

src/production_analytics/service/material_context.py

@@ -0,0 +1,25 @@
+"""ERP nominal-width resolution for an explicitly matched production order."""
+
+from production_analytics.context import build_enlyze_production_order, extract_nominal_width_m
+from production_analytics.erp import ErpWorkplaceStatusGateway
+
+
+class ErpNominalWidthProvider:
+    def __init__(
+        self, gateway: ErpWorkplaceStatusGateway, *, workplace: str, format_template: str,
+    ) -> None:
+        self.gateway = gateway
+        self.workplace = workplace
+        self.format_template = format_template
+
+    def __call__(self, production_order: str) -> float:
+        status = self.gateway.get_current_workplace_status(self.workplace)
+        if (status is None
+                or status.workplace.strip().casefold() != self.workplace.strip().casefold()
+                or build_enlyze_production_order(status.production_order, self.format_template)
+                != production_order):
+            raise ValueError("ERP context does not match the production order")
+        width = extract_nominal_width_m(status.article_description)
+        if width is None:
+            raise ValueError("ERP article description has no unambiguous nominal width")
+        return width

src/production_analytics/service/material_efficiency.py

@@ -0,0 +1,119 @@
+"""Feedback-aligned, machine-independent production-order material efficiency."""
+
+from dataclasses import dataclass
+from datetime import UTC, datetime
+from math import isfinite
+from typing import Protocol
+from zoneinfo import ZoneInfo
+
+from production_analytics.context import build_enlyze_production_order, extract_nominal_width_m
+from production_analytics.erp import CurrentWorkplaceStatus
+from production_analytics.service.postgres_material import MaterialSnapshotRepository
+
+
+class WorkplaceStatusReader(Protocol):
+    def get_current_workplace_status(self, workplace: str) -> CurrentWorkplaceStatus | None: ...
+
+
+@dataclass(frozen=True, slots=True)
+class MaterialEfficiencySnapshot:
+    workplace: str
+    machine_id: str
+    calculation_id: str
+    erp_production_order: str
+    enlyze_production_order: str
+    article_number: str | None
+    article_description: str | None
+    nominal_width_m: float | None
+    erp_feedback_timestamp: datetime
+    material_snapshot_timestamp: datetime
+    good_quantity_m2: float
+    material_consumption_kg: float
+    material_consumption_kg_per_m2: float
+    material_consumption_g_per_m2: float
+
+
+class MaterialEfficiencyService:
+    def __init__(
+        self, erp: WorkplaceStatusReader, materials: MaterialSnapshotRepository, *,
+        workplace: str, machine_id: str, calculation_id: str, format_template: str,
+        erp_timezone: ZoneInfo | None = None,
+        output_calculation_id: str | None = None,
+    ) -> None:
+        self.erp = erp
+        self.materials = materials
+        self.workplace = workplace
+        self.machine_id = machine_id
+        self.calculation_id = calculation_id
+        self.output_calculation_id = output_calculation_id or calculation_id
+        self.format_template = format_template
+        self.erp_timezone = erp_timezone
+
+    def evaluate_current(self) -> MaterialEfficiencySnapshot | None:
+        """Read current ERP feedback once; no scheduling or mutable KPI history."""
+        status = self.erp.get_current_workplace_status(self.workplace)
+        return None if status is None else self.evaluate(status)
+
+    def evaluate(self, status: CurrentWorkplaceStatus) -> MaterialEfficiencySnapshot | None:
+        """Evaluate supplied feedback; missing/invalid numeric inputs yield None.
+
+        Configuration, timestamp and adapter contract errors raise ValueError.
+        Database failures propagate, rather than being treated as missing data.
+        """
+        if status.workplace.strip().casefold() != self.workplace.strip().casefold():
+            raise ValueError("ERP workplace does not match configured workplace")
+        order = build_enlyze_production_order(status.production_order, self.format_template)
+        quantity = status.good_quantity_m2
+        if quantity is None or not isfinite(quantity) or quantity <= 0:
+            return None
+        cutoff = _feedback_instant(status.feedback_timestamp, self.erp_timezone)
+        material = self.materials.latest_at_or_before(
+            calculation_id=self.calculation_id, machine_id=self.machine_id,
+            production_order=order, timestamp=cutoff,
+        )
+        if material is None:
+            return None
+        if (
+            material.calculation_id != self.calculation_id
+            or material.machine_id != self.machine_id
+            or material.production_order != order
+            or material.timestamp.utcoffset() is None
+            or material.timestamp > cutoff
+        ):
+            raise ValueError("Material repository returned an unaligned snapshot")
+        consumption = material.consumption_kg
+        if not isfinite(consumption) or consumption < 0:
+            return None
+        kg_per_m2 = consumption / quantity
+        g_per_m2 = kg_per_m2 * 1000
+        if not isfinite(kg_per_m2) or not isfinite(g_per_m2):
+            return None
+        return MaterialEfficiencySnapshot(
+            workplace=status.workplace, machine_id=self.machine_id,
+            calculation_id=self.output_calculation_id,
+            erp_production_order=status.production_order,
+            enlyze_production_order=order, article_number=status.article_number,
+            article_description=status.article_description,
+            nominal_width_m=extract_nominal_width_m(status.article_description),
+            erp_feedback_timestamp=cutoff,
+            material_snapshot_timestamp=material.timestamp,
+            good_quantity_m2=quantity, material_consumption_kg=consumption,
+            material_consumption_kg_per_m2=kg_per_m2,
+            material_consumption_g_per_m2=g_per_m2,
+        )
+
+
+def _feedback_instant(timestamp: datetime, timezone: ZoneInfo | None) -> datetime:
+    if timestamp.utcoffset() is not None:
+        return timestamp.astimezone(UTC)
+    if timezone is None:
+        raise ValueError("Naive ERP feedback timestamp requires explicit erp_timezone")
+    # Round trips reject DST gaps; two distinct instants indicate a DST overlap.
+    instants = set()
+    for fold in (0, 1):
+        instant = timestamp.replace(tzinfo=timezone, fold=fold).astimezone(UTC)
+        if instant.astimezone(timezone).replace(tzinfo=None) == timestamp:
+            instants.add(instant)
+    if len(instants) != 1:
+        raise ValueError("ERP feedback timestamp is ambiguous or nonexistent in erp_timezone")
+    return instants.pop()

src/production_analytics/service/material_efficiency_runner.py

@@ -0,0 +1,60 @@
+"""Independent foreground ERP feedback polling; PostgreSQL owns deduplication."""
+
+import sys
+import time
+from collections.abc import Callable
+from typing import TextIO
+
+import psycopg
+
+from production_analytics.calculations.config import finite_number
+from production_analytics.erp import ErpReadError
+from production_analytics.service.material_efficiency import MaterialEfficiencyService
+from production_analytics.service.postgres_material_efficiency import MaterialEfficiencyWriter
+
+
+class MaterialEfficiencyRunner:
+    def __init__(
+        self,
+        service: MaterialEfficiencyService,
+        writer: MaterialEfficiencyWriter,
+        *,
+        poll_interval_seconds: float = 60,
+        sleep: Callable[[float], None] = time.sleep,
+        stderr: TextIO | None = None,
+        stdout: TextIO | None = None,
+    ) -> None:
+        self.service = service
+        self.writer = writer
+        self.interval = finite_number(poll_interval_seconds, "poll interval", positive=True)
+        self.sleep = sleep
+        self.stderr = stderr if stderr is not None else sys.stderr
+        self.stdout = stdout if stdout is not None else sys.stdout
+
+    def run(self) -> None:
+        try:
+            while True:
+                try:
+                    snapshot = self.service.evaluate_current()
+                    if snapshot is not None and self.writer.write(snapshot):
+                        print(
+                            f"{snapshot.erp_feedback_timestamp.isoformat()} "
+                            f"workplace={snapshot.workplace!r} "
+                            f"production_order={snapshot.enlyze_production_order!r} "
+                            f"good_m2={snapshot.good_quantity_m2:.3f} "
+                            f"material_kg={snapshot.material_consumption_kg:.3f} "
+                            f"g_per_m2={snapshot.material_consumption_g_per_m2:.3f}",
+                            file=self.stdout,
+                            flush=True,
+                        )
+                except (ErpReadError, psycopg.OperationalError, psycopg.InterfaceError) as exc:
+                    # Never include driver messages, SQL, credentials or response bodies.
+                    print(
+                        f"Material efficiency cycle failed: {type(exc).__name__}",
+                        file=self.stderr,
+                        flush=True,
+                    )
+                # Fixed delay even after unavailable evaluations or transient failures.
+                self.sleep(self.interval)
+        except KeyboardInterrupt:
+            return

src/production_analytics/service/material_efficiency_runtime.py

@@ -0,0 +1,83 @@
+"""Small strict YAML configuration and composition for KPI persistence."""
+
+import os
+from pathlib import Path
+from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
+
+import yaml
+
+from production_analytics.calculations.config import (
+    CalculationConfigError,
+    _UniqueLoader,
+    finite_number,
+)
+from production_analytics.context import build_enlyze_production_order
+from production_analytics.enlyze.exploration import ConfigurationError, load_secret_file
+from production_analytics.erp import ErpSettings, ErpWorkplaceStatusGateway
+from production_analytics.service.material_efficiency import MaterialEfficiencyService
+from production_analytics.service.material_efficiency_runner import MaterialEfficiencyRunner
+from production_analytics.service.postgres_material import (
+    PostgresMaterialSnapshotRepository,
+    PostgresSettings,
+)
+from production_analytics.service.postgres_material_efficiency import (
+    PostgresMaterialEfficiencyWriter,
+)
+
+
+def build_material_efficiency_runner(
+    config: Path,
+    *,
+    secrets_file: Path = Path("secrets/enlyze.env"),
+    erp_secrets_file: Path = Path("secrets/erp.env"),
+) -> MaterialEfficiencyRunner:
+    try:
+        document = yaml.load(config.read_text(encoding="utf-8"), Loader=_UniqueLoader)
+    except (OSError, UnicodeError, yaml.YAMLError):
+        raise CalculationConfigError("Cannot read material efficiency YAML configuration") from None
+    required = {
+        "workplace",
+        "machine_id",
+        "calculation_id",
+        "production_order_format",
+        "erp_timezone",
+    }
+    if (
+        not isinstance(document, dict)
+        or not required <= document.keys()
+        or document.keys() - required - {"poll_interval_seconds", "output_calculation_id"}
+    ):
+        raise CalculationConfigError("Invalid material efficiency configuration fields")
+    for name in required | ({"output_calculation_id"} & document.keys()):
+        value = document[name]
+        if not isinstance(value, str) or not value.strip() or "\x00" in value:
+            raise CalculationConfigError(f"{name} must be a non-empty string without NUL bytes")
+    try:
+        timezone = ZoneInfo(document["erp_timezone"])
+        build_enlyze_production_order("0", document["production_order_format"])
+    except (ValueError, ZoneInfoNotFoundError):
+        raise CalculationConfigError("Invalid ERP timezone or production order format") from None
+    interval = finite_number(
+        document.get("poll_interval_seconds", 60), "poll interval", positive=True
+    )
+    environment = dict(os.environ)
+    try:
+        environment.update(load_secret_file(secrets_file))
+    except Exception:
+        raise ConfigurationError("PostgreSQL settings file could not be loaded") from None
+    postgres = PostgresSettings.from_environment(environment)
+    erp = ErpSettings.from_secret_file(erp_secrets_file)
+    return MaterialEfficiencyRunner(
+        MaterialEfficiencyService(
+            ErpWorkplaceStatusGateway(erp),
+            PostgresMaterialSnapshotRepository(postgres),
+            workplace=document["workplace"],
+            machine_id=document["machine_id"],
+            calculation_id=document["calculation_id"],
+            format_template=document["production_order_format"],
+            erp_timezone=timezone,
+            output_calculation_id=document.get("output_calculation_id"),
+        ),
+        PostgresMaterialEfficiencyWriter(postgres),
+        poll_interval_seconds=interval,
+    )

src/production_analytics/service/material_polling.py

@@ -0,0 +1,198 @@
+"""Single-cycle live material polling orchestration."""
+
+from collections.abc import Callable
+from dataclasses import dataclass
+from datetime import datetime
+from typing import Protocol
+
+from production_analytics.calculations.material_consumption import (
+    MaterialConsumptionIntegrator,
+    MaterialIntegrationState,
+    MaterialIntegratorConfig,
+)
+from production_analytics.enlyze.gateway import (
+    EnlyzeApiGateway,
+    EnlyzeProductionRun,
+)
+from production_analytics.service.postgres_material_application import MaterialApplicationWriter
+
+
+@dataclass(frozen=True, slots=True)
+class MaterialPollingState:
+    run_id: str
+    integration_state: MaterialIntegrationState
+
+
+class MaterialStateStore(Protocol):
+    def load(
+        self,
+        machine_id: str,
+        production_order: str,
+    ) -> MaterialPollingState | None: ...
+
+    def save(
+        self,
+        machine_id: str,
+        production_order: str,
+        state: MaterialPollingState,
+    ) -> None: ...
+
+
+@dataclass(frozen=True, slots=True)
+class MaterialPollResult:
+    run: EnlyzeProductionRun
+    state: MaterialIntegrationState
+
+
+class MaterialPollingService:
+    def __init__(
+        self,
+        *,
+        gateway: EnlyzeApiGateway,
+        state_store: MaterialStateStore,
+        machine_id: str,
+        rate_variable_id: str,
+        gate_variable_id: str | None,
+        gate_threshold: float,
+        max_sample_gap_seconds: float,
+        application_variable_ids: tuple[str, ...] = (),
+        rotational_speed_variable_ids: tuple[str, ...] = (),
+        specific_discharge_kg_per_rev_m: float | None = None,
+        nominal_width_provider: Callable[[str], float] | None = None,
+        process_application_calculation_id: str | None = None,
+        application_writer: MaterialApplicationWriter | None = None,
+    ) -> None:
+        if application_variable_ids and rotational_speed_variable_ids:
+            raise ValueError("Material source modes are mutually exclusive")
+        if process_application_calculation_id is not None and (
+            not rotational_speed_variable_ids or not gate_variable_id
+            or gate_threshold <= 0 or application_writer is None
+        ):
+            raise ValueError(
+                "Process application requires rotational source, positive gate and writer"
+            )
+        self._process_application_calculation_id = process_application_calculation_id
+        self._application_writer = application_writer
+        self._rotational_speed_variable_ids = rotational_speed_variable_ids
+        self._specific_discharge = specific_discharge_kg_per_rev_m
+        self._application_variable_ids = application_variable_ids
+        self._nominal_width_provider = nominal_width_provider
+        if ((application_variable_ids or rotational_speed_variable_ids)
+                and nominal_width_provider is None):
+            raise ValueError("width-based source requires a nominal width provider")
+        self._gateway = gateway
+        self._state_store = state_store
+        self._machine_id = machine_id
+        self._rate_variable_id = rate_variable_id
+        self._gate_variable_id = gate_variable_id
+        self._config = MaterialIntegratorConfig(
+            gate_threshold=gate_threshold if gate_variable_id is not None else 0.0,
+            max_sample_gap_seconds=max_sample_gap_seconds,
+        )
+
+    def poll_once(self, *, now: datetime) -> MaterialPollResult | None:
+        if now.tzinfo is None or now.utcoffset() is None:
+            raise ValueError("now must be timezone-aware")
+        run = self._gateway.get_open_production_run(self._machine_id)
+        if run is None or now < run.start:
+            return None
+
+        width = (self._nominal_width_provider(run.production_order)
+                 if self._application_variable_ids or self._rotational_speed_variable_ids else None)
+        saved_polling_state = self._state_store.load(
+            self._machine_id,
+            run.production_order,
+        )
+
+        if saved_polling_state is None:
+            initial_state = MaterialIntegrationState()
+            historical_runs = sorted(
+                (
+                    previous for previous in self._gateway.get_production_runs(self._machine_id)
+                    if previous.production_order == run.production_order
+                    and previous.uuid != run.uuid
+                    and previous.start <= run.start
+                ),
+                key=lambda previous: previous.start,
+            )
+            for previous in historical_runs:
+                if previous.end is None or previous.end > run.start:
+                    raise ValueError("Historical production run overlaps the current open run")
+                integrated = self._integrate(
+                    initial_state, start=previous.start, end=previous.end,
+                    width=width, run=previous,
+                )
+                initial_state = MaterialIntegrationState(
+                    cumulative_consumption_kg=integrated.cumulative_consumption_kg,
+                    integrated_running_seconds=integrated.integrated_running_seconds,
+                )
+            start = run.start
+        elif saved_polling_state.run_id == run.uuid:
+            initial_state = saved_polling_state.integration_state
+            start = (
+                initial_state.last_processed_timestamp
+                if initial_state.last_processed_timestamp is not None
+                else run.start
+            )
+        else:
+            previous = saved_polling_state.integration_state
+            initial_state = MaterialIntegrationState(
+                cumulative_consumption_kg=previous.cumulative_consumption_kg,
+                integrated_running_seconds=previous.integrated_running_seconds,
+            )
+            start = run.start
+
+        if now < start:
+            return None
+
+        state = self._integrate(initial_state, start=start, end=now, width=width, run=run)
+
+        self._state_store.save(
+            self._machine_id,
+            run.production_order,
+            MaterialPollingState(
+                run_id=run.uuid,
+                integration_state=state,
+            ),
+        )
+
+        return MaterialPollResult(
+            run=run,
+            state=state,
+        )
+
+    def _integrate(
+        self, initial_state: MaterialIntegrationState, *, start: datetime, end: datetime,
+        width: float | None = None, run: EnlyzeProductionRun | None = None,
+    ) -> MaterialIntegrationState:
+        integrator = MaterialConsumptionIntegrator(self._config, initial_state=initial_state)
+        source_options = {}
+        if self._application_variable_ids:
+            source_options = dict(
+                application_variable_ids=self._application_variable_ids, nominal_width_m=width,
+            )
+        if self._rotational_speed_variable_ids:
+            source_options = dict(
+                rotational_speed_variable_ids=self._rotational_speed_variable_ids,
+                specific_discharge_kg_per_rev_m=self._specific_discharge, nominal_width_m=width,
+            )
+        if self._process_application_calculation_id is not None:
+            source_options["process_application_gate_threshold"] = self._config.gate_threshold
+        samples = self._gateway.get_material_samples(
+            machine_id=self._machine_id,
+            rate_variable_id=self._rate_variable_id,
+            gate_variable_id=self._gate_variable_id,
+            start=start,
+            end=end,
+            **source_options,
+        )
+        state = integrator.process_many(samples)
+        if self._process_application_calculation_id is not None:
+            assert self._application_writer is not None and run is not None
+            # Persist before advancing the checkpoint, so failed writes can be retried.
+            self._application_writer.write(
+                calculation_id=self._process_application_calculation_id,
+                machine_id=self._machine_id, production_order=run.production_order,
+                run_id=run.uuid, samples=samples,
+            )
+        return state

src/production_analytics/service/material_runner.py

@@ -0,0 +1,88 @@
+"""Sequential foreground polling with injectable time and output."""
+
+import sys
+import time
+from collections.abc import Callable
+from datetime import UTC, datetime
+from typing import TextIO
+
+from production_analytics.calculations.config import finite_number
+from production_analytics.enlyze.exploration import ConfigurationError, ExplorationError
+from production_analytics.service.material_polling import MaterialPollingService
+from production_analytics.service.postgres_material import MaterialSnapshotWriter
+
+
+class MaterialStateError(RuntimeError):
+    """State operation failed; message contains only the operation and error class."""
+
+
+def utc_now() -> datetime:
+    return datetime.now(UTC)
+
+
+class MaterialPollingRunner:
+    def __init__(
+        self, service: MaterialPollingService, *, machine_id: str,
+        calculation_id: str, snapshot_writer: MaterialSnapshotWriter,
+        poll_interval_seconds: float, clock: Callable[[], datetime] = utc_now,
+        sleep: Callable[[float], None] = time.sleep,
+        stdout: TextIO | None = None, stderr: TextIO | None = None,
+    ) -> None:
+        self.service = service
+        self.machine_id = machine_id
+        self.calculation_id = calculation_id
+        self.snapshot_writer = snapshot_writer
+        self.interval = finite_number(poll_interval_seconds, "poll interval", positive=True)
+        self.clock = clock
+        self.sleep = sleep
+        self.stdout = stdout if stdout is not None else sys.stdout
+        self.stderr = stderr if stderr is not None else sys.stderr
+
+    def run(self) -> None:
+        try:
+            while True:
+                now = self.clock()
+                if now.tzinfo is None or now.utcoffset() is None:
+                    raise ConfigurationError("Runner clock must return timezone-aware timestamps")
+                now = now.astimezone(UTC)
+                prefix = f"{now.isoformat()} machine={self.machine_id!r}"
+                try:
+                    result = self.service.poll_once(now=now)
+                except ConfigurationError:
+                    raise
+                except Exception as exc:
+                    if isinstance(exc, MaterialStateError):
+                        detail = str(exc)
+                    elif isinstance(exc, ExplorationError):
+                        detail = f"ENLYZE/gateway: {type(exc).__name__}"
+                    else:
+                        detail = f"gateway/poll cycle: {type(exc).__name__}"
+                    # Do not echo arbitrary exception messages or response bodies.
+                    print(f"{prefix} error {detail}", file=self.stderr, flush=True)
+                else:
+                    if result is None:
+                        detail = "no open Production Run / no eligible polling window"
+                    else:
+                        try:
+                            self.snapshot_writer.write(
+                                timestamp=now, calculation_id=self.calculation_id,
+                                machine_id=self.machine_id,
+                                production_order=result.run.production_order,
+                                run_id=result.run.uuid,
+                                consumption_kg=result.state.cumulative_consumption_kg,
+                            )
+                        except Exception:
+                            print(
+                                f"{prefix} error PostgreSQL snapshot write failed",
+                                file=self.stderr, flush=True,
+                            )
+                        detail = (
+                            f"production_order={result.run.production_order!r} "
+                            f"consumption_kg={result.state.cumulative_consumption_kg:.9f} "
+                            f"running_seconds={result.state.integrated_running_seconds:.3f}"
+                        )
+                    print(f"{prefix} {detail}", file=self.stdout, flush=True)
+                # Fixed delay after completion, including errors; never catch up or overlap.
+                self.sleep(self.interval)
+        except KeyboardInterrupt:
+            print("Material polling stopped", file=self.stdout, flush=True)

src/production_analytics/service/material_runtime.py

@@ -0,0 +1,113 @@
+"""Compose the configured live material polling application."""
+
+import math
+import os
+import tempfile
+from pathlib import Path
+from urllib.parse import urlsplit
+
+from production_analytics.calculations.config import MaterialCalculationConfig, finite_number
+from production_analytics.enlyze.exploration import (
+    ConfigurationError,
+    ExplorationClient,
+    ExplorationSettings,
+    load_secret_file,
+)
+from production_analytics.enlyze.gateway import EnlyzeApiGateway
+from production_analytics.erp import ErpSettings, ErpWorkplaceStatusGateway
+from production_analytics.service.material_context import ErpNominalWidthProvider
+from production_analytics.service.material_polling import (
+    MaterialPollingService,
+    MaterialPollingState,
+)
+from production_analytics.service.material_runner import MaterialPollingRunner, MaterialStateError
+from production_analytics.service.material_state_store import JsonMaterialStateStore
+from production_analytics.service.postgres_material import (
+    PostgresMaterialSnapshotWriter,
+    PostgresSettings,
+)
+from production_analytics.service.postgres_material_application import (
+    PostgresMaterialApplicationWriter,
+)
+
+
+class _ReportingStateStore:
+    def __init__(self, store: JsonMaterialStateStore) -> None:
+        self.store = store
+
+    def load(self, machine_id: str, production_order: str) -> MaterialPollingState | None:
+        try:
+            return self.store.load(machine_id, production_order)
+        except Exception as exc:
+            raise MaterialStateError(f"state loading: {type(exc).__name__}") from exc
+
+    def save(
+        self, machine_id: str, production_order: str, state: MaterialPollingState,
+    ) -> None:
+        try:
+            self.store.save(machine_id, production_order, state)
+        except Exception as exc:
+            raise MaterialStateError(f"state saving: {type(exc).__name__}") from exc
+
+
+def build_material_runner(
+    calculation: MaterialCalculationConfig, *, poll_interval_seconds: float,
+    state_directory: Path, secrets_file: Path,
+    erp_secrets_file: Path = Path("secrets/erp.env"),
+) -> MaterialPollingRunner:
+    finite_number(poll_interval_seconds, "poll interval", positive=True)
+    environment = dict(os.environ)
+    environment.update(load_secret_file(secrets_file))
+    settings = ExplorationSettings.from_environment(environment)
+    parsed = urlsplit(settings.base_url)
+    if parsed.scheme not in {"http", "https"} or not parsed.hostname or parsed.username:
+        raise ConfigurationError(
+            "ENLYZE_BASE_URL must be an HTTP(S) server URL without credentials"
+	)
+    if not math.isfinite(settings.timeout_seconds):
+        raise ConfigurationError("ENLYZE_HTTP_TIMEOUT_SECONDS must be finite")
+    try:
+        state_directory.mkdir(parents=True, exist_ok=True)
+        with tempfile.TemporaryFile(dir=state_directory):
+            pass
+    except OSError as exc:
+        raise ConfigurationError(
+            f"State directory startup check failed: {type(exc).__name__}"
+        ) from exc
+    postgres_settings = PostgresSettings.from_environment(environment)
+    source_options = {}
+    if calculation.source_mode in {"area_application", "rotational_discharge"}:
+        source_options = dict(
+            application_variable_ids=calculation.application_signal_refs,
+            nominal_width_provider=ErpNominalWidthProvider(
+                ErpWorkplaceStatusGateway(ErpSettings.from_secret_file(erp_secrets_file)),
+                workplace=calculation.erp_workplace,
+                format_template=calculation.production_order_format,
+            ),
+        )
+    if calculation.source_mode == "rotational_discharge":
+        source_options.pop("application_variable_ids")
+        source_options.update(
+            rotational_speed_variable_ids=calculation.rotational_speed_signal_refs,
+            specific_discharge_kg_per_rev_m=calculation.specific_discharge_kg_per_rev_m,
+        )
+    if calculation.process_application_calculation_id is not None:
+        source_options.update(
+            process_application_calculation_id=calculation.process_application_calculation_id,
+            application_writer=PostgresMaterialApplicationWriter(postgres_settings),
+        )
+    service = MaterialPollingService(
+        gateway=EnlyzeApiGateway(ExplorationClient(settings)),
+        state_store=_ReportingStateStore(JsonMaterialStateStore(state_directory)),
+        machine_id=calculation.machine_ref,
+        rate_variable_id=calculation.rate_signal_ref,
+        gate_variable_id=calculation.gate_signal_ref,
+        gate_threshold=calculation.gate_threshold,
+        max_sample_gap_seconds=calculation.max_sample_gap_seconds,
+        **source_options,
+    )
+    return MaterialPollingRunner(
+        service, calculation_id=calculation.id,
+        snapshot_writer=PostgresMaterialSnapshotWriter(postgres_settings),
+        machine_id=calculation.machine_ref, poll_interval_seconds=poll_interval_seconds,
+    )

src/production_analytics/service/material_state_store.py

@@ -0,0 +1,80 @@
+"""JSON-backed persistence for material polling state."""
+
+import hashlib
+import json
+import os
+import tempfile
+from pathlib import Path
+
+from production_analytics.calculations.material_state import (
+    material_state_from_dict,
+    material_state_to_dict,
+)
+from production_analytics.service.material_polling import MaterialPollingState
+
+
+class JsonMaterialStateStore:
+    def __init__(self, directory: str | Path) -> None:
+        self._directory = Path(directory)
+
+    def load(
+        self,
+        machine_id: str,
+        production_order: str,
+    ) -> MaterialPollingState | None:
+        path = self._path(machine_id, production_order)
+        if not path.exists():
+            return None
+
+        try:
+            with path.open(encoding="utf-8") as f:
+                data = json.load(f)
+            if not isinstance(data, dict) or not isinstance(data.get("run_id"), str):
+                raise ValueError("run_id must be a string")
+            if not data["run_id"]:
+                raise ValueError("run_id must not be empty")
+            return MaterialPollingState(
+                run_id=data["run_id"],
+                integration_state=material_state_from_dict(data["integration_state"]),
+            )
+        except (ValueError, KeyError, TypeError) as exc:
+            raise ValueError(f"Invalid material polling state in {path}: {exc}") from exc
+
+    def save(
+        self,
+        machine_id: str,
+        production_order: str,
+        state: MaterialPollingState,
+    ) -> None:
+        self._directory.mkdir(parents=True, exist_ok=True)
+        path = self._path(machine_id, production_order)
+
+        payload = {
+            "run_id": state.run_id,
+            "integration_state": material_state_to_dict(state.integration_state),
+        }
+
+        # Validate before touching the primary file, including non-finite values.
+        material_state_from_dict(payload["integration_state"])
+        if not isinstance(state.run_id, str) or not state.run_id:
+            raise ValueError("run_id must be a non-empty string")
+        temporary_path = None
+        try:
+            with tempfile.NamedTemporaryFile(
+                mode="w", encoding="utf-8", dir=self._directory,
+                prefix=".material-state-", suffix=".tmp", delete=False,
+            ) as f:
+                temporary_path = Path(f.name)
+                json.dump(payload, f, indent=2, allow_nan=False)
+                f.flush()
+                os.fsync(f.fileno())
+            os.replace(temporary_path, path)
+        finally:
+            if temporary_path is not None:
+                temporary_path.unlink(missing_ok=True)
+
+    def _path(self, machine_id: str, production_order: str) -> Path:
+        # Hash the structured pair: sanitizing alone aliases distinct identifiers.
+        identity = json.dumps([machine_id, production_order], ensure_ascii=True)
+        digest = hashlib.sha256(identity.encode("utf-8")).hexdigest()
+        return self._directory / f"{digest}.json"

src/production_analytics/service/postgres_material.py

@@ -0,0 +1,116 @@
+"""PostgreSQL settings and derived material snapshot reads/writes."""
+
+from collections.abc import Mapping
+from dataclasses import dataclass, field
+from datetime import datetime
+from typing import Protocol
+
+from production_analytics.enlyze.exploration import ConfigurationError
+
+
+@dataclass(frozen=True, slots=True)
+class PostgresSettings:
+    host: str
+    port: int
+    dbname: str
+    user: str
+    password: str = field(repr=False)
+
+    @classmethod
+    def from_environment(cls, environment: Mapping[str, str]) -> "PostgresSettings":
+        values = {}
+        for key in ('HOST', 'PORT', 'DB', 'USER', 'PASSWORD'):
+            name = f'POSTGRES_{key}'
+            value = environment.get(name)
+            if not isinstance(value, str) or not value.strip() or '\x00' in value:
+                raise ConfigurationError(f'{name} must be a non-empty value without NUL bytes')
+            values[key] = value
+        try:
+            port = int(values['PORT'])
+        except ValueError:
+            raise ConfigurationError('POSTGRES_PORT must be an integer from 1 to 65535') from None
+        if not 1 <= port <= 65535:
+            raise ConfigurationError('POSTGRES_PORT must be an integer from 1 to 65535')
+        return cls(values['HOST'], port, values['DB'], values['USER'], values['PASSWORD'])
+
+
+class MaterialSnapshotWriter(Protocol):
+    def write(
+        self, *, timestamp: datetime, calculation_id: str, machine_id: str,
+        production_order: str, run_id: str, consumption_kg: float,
+    ) -> None: ...
+
+
+@dataclass(frozen=True, slots=True)
+class MaterialConsumptionSnapshot:
+    timestamp: datetime
+    calculation_id: str
+    machine_id: str
+    production_order: str
+    run_id: str
+    consumption_kg: float
+
+
+class MaterialSnapshotRepository(Protocol):
+    def latest_at_or_before(
+        self, *, calculation_id: str, machine_id: str, production_order: str,
+        timestamp: datetime,
+    ) -> MaterialConsumptionSnapshot | None: ...
+
+
+class PostgresMaterialSnapshotRepository:
+    def __init__(self, settings: PostgresSettings) -> None:
+        self.settings = settings
+
+    def latest_at_or_before(
+        self, *, calculation_id: str, machine_id: str, production_order: str,
+        timestamp: datetime,
+    ) -> MaterialConsumptionSnapshot | None:
+        """Read one exact-order cumulative snapshot, never later than the aware cutoff."""
+        if timestamp.utcoffset() is None:
+            raise ValueError("Material snapshot cutoff must be timezone-aware")
+        import psycopg
+
+        with psycopg.connect(
+            host=self.settings.host, port=self.settings.port, dbname=self.settings.dbname,
+            user=self.settings.user, password=self.settings.password, connect_timeout=10,
+            options='-c statement_timeout=10000',
+        ) as connection:
+            row = connection.execute(
+                """SELECT timestamp, calculation_id, machine_id, production_order,
+                          run_id, consumption_kg
+                   FROM material_consumption_snapshots
+                   WHERE calculation_id = %s AND machine_id = %s
+                     AND production_order = %s AND timestamp <= %s
+                   ORDER BY timestamp DESC
+                   LIMIT 1""",
+                (calculation_id, machine_id, production_order, timestamp),
+            ).fetchone()
+        return None if row is None else MaterialConsumptionSnapshot(*row)
+
+
+class PostgresMaterialSnapshotWriter:
+    def __init__(self, settings: PostgresSettings) -> None:
+        self.settings = settings
+
+    def write(
+        self, *, timestamp: datetime, calculation_id: str, machine_id: str,
+        production_order: str, run_id: str, consumption_kg: float,
+    ) -> None:
+        import psycopg
+
+        # One short transaction per cycle; context exit commits or rolls back and closes.
+        # A fresh connection lets the next cycle recover after a database outage.
+        with psycopg.connect(
+            host=self.settings.host, port=self.settings.port, dbname=self.settings.dbname,
+            user=self.settings.user, password=self.settings.password, connect_timeout=10,
+            options='-c statement_timeout=10000',
+        ) as connection:
+            connection.execute(
+                """INSERT INTO material_consumption_snapshots
+                   (timestamp, calculation_id, machine_id, production_order, run_id, consumption_kg)
+                   VALUES (%s, %s, %s, %s, %s, %s)
+                   ON CONFLICT (calculation_id, machine_id, production_order, timestamp)
+                   DO NOTHING""",
+                (timestamp, calculation_id, machine_id, production_order, run_id, consumption_kg),
+            )

src/production_analytics/service/postgres_material_application.py

@@ -0,0 +1,53 @@
+"""Generic process application snapshots, timestamped at the source sample."""
+
+from collections.abc import Sequence
+from typing import Protocol
+
+import psycopg
+
+from production_analytics.calculations.config import finite_number
+from production_analytics.calculations.material_consumption import MaterialSample
+from production_analytics.service.postgres_material import PostgresSettings
+
+
+class MaterialApplicationWriter(Protocol):
+    def write(
+        self, *, calculation_id: str, machine_id: str, production_order: str,
+        run_id: str, samples: Sequence[MaterialSample],
+    ) -> None: ...
+
+
+class PostgresMaterialApplicationWriter:
+    def __init__(self, settings: PostgresSettings) -> None:
+        self.settings = settings
+
+    def write(
+        self, *, calculation_id: str, machine_id: str, production_order: str,
+        run_id: str, samples: Sequence[MaterialSample],
+    ) -> None:
+        rows = []
+        for sample in samples:
+            if sample.application_g_m2 is None:
+                continue
+            if sample.timestamp.utcoffset() is None:
+                raise ValueError("Application timestamp must be timezone-aware")
+            finite_number(sample.application_g_m2, "application_g_m2")
+            rows.append((sample.timestamp, calculation_id, machine_id, production_order,
+                         run_id, sample.application_g_m2))
+        if not rows:
+            return
+        with psycopg.connect(
+            host=self.settings.host, port=self.settings.port, dbname=self.settings.dbname,
+            user=self.settings.user, password=self.settings.password, connect_timeout=10,
+            options="-c statement_timeout=10000",
+        ) as connection:
+            with connection.cursor() as cursor:
+                cursor.executemany(
+                    """INSERT INTO material_application_snapshots
+                       (timestamp, calculation_id, machine_id, production_order,
+                        run_id, application_g_m2)
+                       VALUES (%s, %s, %s, %s, %s, %s)
+                       ON CONFLICT (calculation_id, machine_id, production_order, timestamp)
+                       DO NOTHING""",
+                    rows,
+                )

src/production_analytics/service/postgres_material_efficiency.py

@@ -0,0 +1,71 @@
+"""Immutable PostgreSQL history of feedback-aligned KPI points."""
+
+from typing import Protocol
+
+import psycopg
+
+from production_analytics.calculations.config import finite_number
+from production_analytics.service.material_efficiency import MaterialEfficiencySnapshot
+from production_analytics.service.postgres_material import PostgresSettings
+
+
+class MaterialEfficiencyWriter(Protocol):
+    def write(self, snapshot: MaterialEfficiencySnapshot) -> bool: ...
+
+
+class PostgresMaterialEfficiencyWriter:
+    def __init__(self, settings: PostgresSettings) -> None:
+        self.settings = settings
+
+    def write(self, snapshot: MaterialEfficiencySnapshot) -> bool:
+        for name in ("erp_feedback_timestamp", "material_snapshot_timestamp"):
+            if getattr(snapshot, name).utcoffset() is None:
+                raise ValueError(f"{name} must be timezone-aware")
+        for name in (
+            "good_quantity_m2",
+            "material_consumption_kg",
+            "material_consumption_kg_per_m2",
+            "material_consumption_g_per_m2",
+        ):
+            finite_number(getattr(snapshot, name), name)
+        if snapshot.nominal_width_m is not None:
+            finite_number(snapshot.nominal_width_m, "nominal_width_m")
+        # Context exit commits/rolls back and closes; later cycles reconnect after outages.
+        with psycopg.connect(
+            host=self.settings.host,
+            port=self.settings.port,
+            dbname=self.settings.dbname,
+            user=self.settings.user,
+            password=self.settings.password,
+            connect_timeout=10,
+            options="-c statement_timeout=10000",
+        ) as connection:
+            row = connection.execute(
+                """INSERT INTO material_efficiency_snapshots (
+                    erp_feedback_timestamp, material_snapshot_timestamp, calculation_id,
+                    machine_id, workplace, erp_production_order, enlyze_production_order,
+                    article_number, article_description, nominal_width_m, good_quantity_m2,
+                    material_consumption_kg, material_consumption_kg_per_m2,
+                    material_consumption_g_per_m2
+                ) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+                ON CONFLICT (calculation_id, machine_id, enlyze_production_order,
+                             erp_feedback_timestamp) DO NOTHING
+                RETURNING 1""",
+                (
+                    snapshot.erp_feedback_timestamp,
+                    snapshot.material_snapshot_timestamp,
+                    snapshot.calculation_id,
+                    snapshot.machine_id,
+                    snapshot.workplace,
+                    snapshot.erp_production_order,
+                    snapshot.enlyze_production_order,
+                    snapshot.article_number,
+                    snapshot.article_description,
+                    snapshot.nominal_width_m,
+                    snapshot.good_quantity_m2,
+                    snapshot.material_consumption_kg,
+                    snapshot.material_consumption_kg_per_m2,
+                    snapshot.material_consumption_g_per_m2,
+                ),
+            ).fetchone()
+        return row is not None

tests/test_area_material_consumption.py

@@ -0,0 +1,257 @@
+from dataclasses import replace
+from datetime import datetime, timedelta
+from types import SimpleNamespace
+from unittest.mock import Mock
+
+import pytest
+import yaml
+
+from production_analytics.calculations.config import (
+    CalculationConfigError,
+    load_material_calculation,
+)
+from production_analytics.calculations.material_consumption import (
+    MaterialConsumptionIntegrator,
+    MaterialIntegratorConfig,
+    area_application_rate_kg_per_hour,
+)
+from production_analytics.enlyze.gateway import EnlyzeApiGateway, EnlyzeProductionRun
+from production_analytics.service.material_context import ErpNominalWidthProvider
+from production_analytics.service.material_polling import MaterialPollingService
+from production_analytics.service.material_state_store import JsonMaterialStateStore
+
+
+def timestamp(value):
+    return datetime.fromisoformat(value.replace('Z', '+00:00'))
+
+
+def test_area_units_and_strict_gate():
+    client = Mock()
+    start = timestamp('2026-08-25T05:27:18Z')
+    client.post_json.return_value.body = {'data': {
+        'columns': ['speed', 's2', 'time', 's1'],
+        'records': [[speed, 2000, (start + timedelta(minutes=i)).isoformat(), 3000]
+                    for i, speed in enumerate([2, 0.3, 0, 2, 2])],
+    }}
+    samples = EnlyzeApiGateway(client).get_material_samples(
+        machine_id='machine', rate_variable_id='unused', gate_variable_id='speed',
+        application_variable_ids=('s1', 's2'), nominal_width_m=5,
+        start=start, end=start + timedelta(minutes=4),
+    )
+    state = MaterialConsumptionIntegrator(MaterialIntegratorConfig(0.3, 60)).process_many(samples)
+    assert state.cumulative_consumption_kg == 100
+    assert state.integrated_running_seconds == 120
+    assert client.post_json.call_args.args[1]['variables'] == [
+        {'uuid': 's1'}, {'uuid': 's2'}, {'uuid': 'speed'},
+    ]
+
+
+@pytest.mark.parametrize('sources,width,speed', [
+    ([], 5, 2), ([float('nan')], 5, 2), ([1], 0, 2), ([1], 5, float('inf')),
+])
+def test_invalid_area_inputs(sources, width, speed):
+    with pytest.raises(ValueError):
+        area_application_rate_kg_per_hour(sources, width, speed)
+
+
+@pytest.mark.parametrize('bad', [None, True, float('nan')])
+def test_missing_or_invalid_spreader_fails(bad):
+    client = Mock()
+    now = timestamp('2026-08-25T05:27:18Z')
+    client.post_json.return_value.body = {'data': {
+        'columns': ['time', 's1', 's2', 'speed'],
+        'records': [[now.isoformat(), 3000, bad, 2]],
+    }}
+    with pytest.raises(ValueError):
+        EnlyzeApiGateway(client).get_material_samples(
+            machine_id='machine', rate_variable_id='unused', gate_variable_id='speed',
+            application_variable_ids=('s1', 's2'), nominal_width_m=5, start=now, end=now,
+        )
+
+
+def width_provider():
+    erp = Mock()
+    erp.get_current_workplace_status.return_value = SimpleNamespace(
+        workplace='Bento 1', production_order='12026000814', article_number='180305',
+        article_description='Bfix NSP 5300,     5,00 x 40 m',
+    )
+    return ErpNominalWidthProvider(
+        erp, workplace='Bento 1', format_template='Bento 1-{production_order}',
+    )
+
+
+@pytest.mark.parametrize('configured,returned', [
+    ('Bento 1', 'BENTO 1'),
+    ('Bento 1', ' \tBENTO 1\n'),
+    (' \tBento 1\n', 'BENTO 1'),
+    ('K7', ' k7 '),
+])
+def test_width_context_normalizes_workplace(configured, returned):
+    provider = width_provider()
+    provider.workplace = configured
+    provider.gateway.get_current_workplace_status.return_value.workplace = returned
+    assert provider('Bento 1-12026000814') == 5.0
+
+
+@pytest.mark.parametrize('production_order', [
+    'Bento 1-12026000815',
+    'BENTO 1-12026000814',
+    ' Bento 1-12026000814 ',
+])
+def test_width_context_keeps_production_order_strict(production_order):
+    provider = width_provider()
+    provider.gateway.get_current_workplace_status.return_value.workplace = 'BENTO 1'
+    with pytest.raises(ValueError, match='ERP context does not match the production order'):
+        provider(production_order)
+
+
+@pytest.mark.parametrize('field,value', [
+    ('production_order', '12026000815'), ('workplace', 'K7'),
+    ('article_description', None), ('article_description', '180305'),
+])
+def test_width_context_fails_closed(field, value):
+    provider = width_provider()
+    setattr(provider.gateway.get_current_workplace_status.return_value, field, value)
+    with pytest.raises(ValueError):
+        provider('Bento 1-12026000814')
+
+
+@pytest.mark.parametrize('inter_run_gap_seconds', [5, 3761])
+def test_bento_rpm_bootstrap_and_persistent_resume(tmp_path, inter_run_gap_seconds):
+    """Synthetic aggregate fixture, not recorded ENLYZE samples.
+
+    Uses realistic rpm values and synthetic active time within actual run boundaries.
+    """
+    config = load_material_calculation('config/bento1-material-consumption.yaml')
+    order = 'Bento 1-12026000814'
+    runs = [EnlyzeProductionRun(
+        uuid, config.machine_ref, 'external-product', order, timestamp(start), timestamp(end),
+    ) for uuid, start, end in [
+        ('b675818c-4636-4976-be6c-3e0e24da9e8a',
+         '2026-08-25T05:27:18Z', '2026-08-26T04:40:58Z'),
+        ('25d67424-8346-42d4-b844-75b4097382bd',
+         '2026-08-26T05:43:39Z', '2026-08-26T05:54:05Z'),
+    ]]
+    runs[1] = replace(
+        runs[1], start=runs[0].end + timedelta(seconds=inter_run_gap_seconds),
+        end=runs[0].end + timedelta(seconds=inter_run_gap_seconds + 626),
+    )
+    speed = 2.0
+    client = Mock()
+
+    def response(path, body):
+        start, end = timestamp(body['start']), timestamp(body['end'])
+        run = next(run for run in runs if run.start <= start <= run.end)
+        active_seconds = 1256 * 60 - 626 if run == runs[0] else 626
+        stop = run.start + timedelta(seconds=active_seconds)
+        times = {start, end}
+        t = start
+        while t < end:
+            times.add(t)
+            t += timedelta(seconds=10)
+        if start <= stop <= end:
+            times.add(stop)
+        return SimpleNamespace(body={'data': {
+            'columns': ['time', *config.rotational_speed_signal_refs, config.gate_signal_ref],
+            'records': [[t.isoformat(), 3.739, 3.956, speed if t < stop else 0]
+                        for t in sorted(times)],
+        }})
+
+    client.post_json.side_effect = response
+    gateway = EnlyzeApiGateway(client)
+    gateway.get_open_production_run = Mock(return_value=replace(runs[1], end=None))
+    gateway.get_production_runs = Mock(return_value=runs)
+    store = JsonMaterialStateStore(tmp_path)
+
+    def service():
+        return MaterialPollingService(
+            gateway=gateway, state_store=store, machine_id=config.machine_ref,
+            rate_variable_id=config.rate_signal_ref, gate_variable_id=config.gate_signal_ref,
+            gate_threshold=config.gate_threshold,
+            max_sample_gap_seconds=config.max_sample_gap_seconds,
+            rotational_speed_variable_ids=config.rotational_speed_signal_refs,
+            specific_discharge_kg_per_rev_m=config.specific_discharge_kg_per_rev_m,
+            nominal_width_provider=width_provider(),
+        )
+
+    partial = service().poll_once(now=runs[1].start + timedelta(seconds=300))
+    result = service().poll_once(now=runs[1].end)
+    assert result.state.cumulative_consumption_kg - partial.state.cumulative_consumption_kg == (
+        pytest.approx((3.739 + 3.956) * 5 * 2.75 * 326 / 60)
+    )
+    assert result.state.integrated_running_seconds / 60 == pytest.approx(1256)
+    assert result.state.cumulative_consumption_kg == pytest.approx(
+        (3.739 + 3.956) * 5 * 2.75 * 1256,
+    )
+    assert service().poll_once(now=runs[1].end).state == result.state
+    assert gateway.get_production_runs.call_count == 1
+    assert [(timestamp(call.args[1]['start']), timestamp(call.args[1]['end']))
+            for call in client.post_json.call_args_list[:2]] == [
+                (runs[0].start, runs[0].end),
+                (runs[1].start, runs[1].start + timedelta(seconds=300)),
+            ]
+
+
+def test_k7_config_defaults_remain_direct():
+    config = load_material_calculation('config/k7-material-consumption.yaml')
+    assert config.source_mode == 'direct_mass_rate'
+    assert config.rotational_speed_signal_refs == ()
+    assert config.application_signal_refs == ()
+    assert config.gate_threshold == 0.5
+    assert config.rate_signal_ref == 'c9d06af5-f6d6-4ede-b6c4-5a98bac77129'
+
+
+@pytest.mark.parametrize('field,value', [
+    ('source_mode', 'unknown'), ('rotational_speed_signal_refs', []),
+    ('rotational_speed_signal_refs', ['same', 'same']), ('erp_workplace', ''),
+    ('production_order_format', '{wrong}'), ('rate_signal_ref', 'direct'),
+])
+def test_invalid_rotational_configuration(tmp_path, field, value):
+    with open('config/bento1-material-consumption.yaml') as stream:
+        document = yaml.safe_load(stream)
+    document['calculations'][0][field] = value
+    path = tmp_path / 'config.yaml'
+    path.write_text(yaml.safe_dump(document))
+    with pytest.raises(CalculationConfigError):
+        load_material_calculation(path)
+
+
+def test_rotational_context_failure_does_not_touch_persistent_state(tmp_path):
+    config = load_material_calculation('config/bento1-material-consumption.yaml')
+    gateway = Mock()
+    now = timestamp('2026-08-25T05:27:18Z')
+    gateway.get_open_production_run.return_value = EnlyzeProductionRun(
+        'run', config.machine_ref, None, 'Bento 1-12026000814', now, None,
+    )
+    provider = width_provider()
+    provider.gateway.get_current_workplace_status.return_value = None
+    store = Mock()
+    service = MaterialPollingService(
+        gateway=gateway, state_store=store, machine_id=config.machine_ref,
+        rate_variable_id=config.rate_signal_ref, gate_variable_id=config.gate_signal_ref,
+        gate_threshold=config.gate_threshold, max_sample_gap_seconds=20,
+        rotational_speed_variable_ids=config.rotational_speed_signal_refs,
+        specific_discharge_kg_per_rev_m=config.specific_discharge_kg_per_rev_m,
+        nominal_width_provider=provider,
+    )
+    with pytest.raises(ValueError, match='context'):
+        service.poll_once(now=now)
+    gateway.get_material_samples.assert_not_called()
+    store.save.assert_not_called()
+
+
+def test_area_gateway_pagination():
+    client = Mock()
+    now = timestamp('2026-08-25T05:27:18Z')
+    client.post_json.side_effect = [SimpleNamespace(body={
+        'metadata': {'next_cursor': cursor},
+        'data': {'columns': ['time', 's1', 's2', 'speed'],
+                 'records': [[(now + timedelta(seconds=i * 10)).isoformat(), 3000, 2000, 2]]},
+    }) for i, cursor in enumerate(['next', None])]
+    samples = EnlyzeApiGateway(client).get_material_samples(
+        machine_id='machine', rate_variable_id='unused', gate_variable_id='speed',
+        application_variable_ids=('s1', 's2'), nominal_width_m=5,
+        start=now, end=now + timedelta(seconds=10),
+    )
+    assert [sample.material_rate_kg_per_hour for sample in samples] == [3000, 3000]
+    assert client.post_json.call_args.args[1]['cursor'] == 'next'

tests/test_calibrations.py

@@ -0,0 +1,143 @@
+from dataclasses import replace
+from datetime import UTC, date, datetime, timedelta
+from pathlib import Path
+from unittest.mock import Mock
+
+import pytest
+import yaml
+
+from production_analytics.calculations.calibrations import load_calibrations, resolve_calibration
+from production_analytics.calculations.config import (
+    CalculationConfigError,
+    load_material_calculation,
+)
+from production_analytics.calculations.material_application import rotational_application_g_m2
+from production_analytics.calculations.material_consumption import (
+    MaterialConsumptionIntegrator,
+    MaterialIntegratorConfig,
+)
+from production_analytics.enlyze.gateway import EnlyzeApiGateway
+
+CALIBRATIONS = Path('config/material-calibrations.yaml')
+BENTO = Path('config/bento1-material-consumption.yaml')
+ID = 'bento1-spreader-1-2'
+
+
+def resolve(entries, identifier=ID):
+    return resolve_calibration(entries, identifier, expected_type='rotational_discharge',
+                               expected_unit='kg_per_rev_m')
+
+
+def test_load_and_resolve():
+    calibration = resolve(load_calibrations(CALIBRATIONS))
+    assert calibration.value == 2.75
+    assert calibration.calibrated_at == date(2026, 9, 8)
+    assert calibration.method == 'gravimetric_tray'
+    assert calibration.reference == {
+        'measured_application_g_m2': 4068, 'line_speed_m_min': 2.3,
+        'signal_values': {'left': 1.65, 'right': 1.75},
+    }
+    assert load_material_calculation(BENTO).specific_discharge_kg_per_rev_m == 2.75
+
+
+@pytest.mark.parametrize('field', ['type', 'value', 'unit', 'calibrated_at', 'method',
+                                   'description', 'reference'])
+def test_missing_metadata(tmp_path, field):
+    document = yaml.safe_load(CALIBRATIONS.read_text())
+    del document['calibrations'][ID][field]
+    path = tmp_path / 'material-calibrations.yaml'
+    path.write_text(yaml.safe_dump(document))
+    with pytest.raises(CalculationConfigError, match='required fields'):
+        load_calibrations(path)
+
+
+@pytest.mark.parametrize('field,value', [
+    ('type', ''), ('unit', None), ('method', 12), ('description', ' '),
+    ('calibrated_at', '2026-02-30'), ('calibrated_at', 123),
+    ('reference', []), ('reference', {}), ('value', True), ('value', float('nan')),
+])
+def test_invalid_metadata(tmp_path, field, value):
+    document = yaml.safe_load(CALIBRATIONS.read_text())
+    document['calibrations'][ID][field] = value
+    path = tmp_path / 'material-calibrations.yaml'
+    path.write_text(yaml.safe_dump(document))
+    with pytest.raises(CalculationConfigError, match=field):
+        load_calibrations(path)
+
+
+@pytest.mark.parametrize('field,value,error', [
+    ('type', 'other', 'incompatible type'), ('unit', 'kg_per_rev', 'incompatible unit'),
+    ('value', 0, 'greater than zero'),
+])
+def test_incompatible_at_config_load(tmp_path, field, value, error):
+    document = yaml.safe_load(CALIBRATIONS.read_text())
+    document['calibrations'][ID][field] = value
+    (tmp_path / CALIBRATIONS.name).write_text(yaml.safe_dump(document))
+    path = tmp_path / BENTO.name
+    path.write_text(BENTO.read_text())
+    with pytest.raises(CalculationConfigError, match=error):
+        load_material_calculation(path)
+
+
+def test_missing_id_and_file(tmp_path):
+    with pytest.raises(CalculationConfigError, match='Missing calibration ID'):
+        resolve(load_calibrations(CALIBRATIONS), 'unknown')
+    path = tmp_path / BENTO.name
+    path.write_text(BENTO.read_text())
+    with pytest.raises(CalculationConfigError, match='Cannot read calibration'):
+        load_material_calculation(path)
+    (tmp_path / CALIBRATIONS.name).write_text(CALIBRATIONS.read_text())
+    path.write_text(BENTO.read_text().replace(ID, 'unknown'))
+    with pytest.raises(CalculationConfigError, match='Missing calibration ID'):
+        load_material_calculation(path)
+
+
+def test_exact_direct_value_equivalence(tmp_path):
+    referenced = load_material_calculation(BENTO)
+    document = yaml.safe_load(BENTO.read_text())
+    entry = document['calculations'][0]
+    del entry['calibration_ref']
+    entry['specific_discharge_kg_per_rev_m'] = 2.75
+    path = tmp_path / 'direct.yaml'
+    path.write_text(yaml.safe_dump(document))
+    direct = load_material_calculation(path)
+    assert replace(referenced, calibration_ref=None) == direct
+    start = datetime(2026, 9, 8, tzinfo=UTC)
+    outputs = []
+    for config in (referenced, direct):
+        factor = config.specific_discharge_kg_per_rev_m
+        application = rotational_application_g_m2([1.65, 1.75], factor, 2.3, 0.3)
+        client = Mock()
+        client.post_json.return_value.body = {'data': {
+            'columns': ['time', 'left', 'right', 'speed'],
+            'records': [[(start + timedelta(seconds=t)).isoformat(), 1.65, 1.75, speed]
+                        for t, speed in [(0, 2.3), (10, 0), (20, 2.3), (50, 2.3), (60, 2.3)]],
+        }}
+        samples = EnlyzeApiGateway(client).get_material_samples(
+            machine_id='m', rate_variable_id='unused', gate_variable_id='speed',
+            rotational_speed_variable_ids=('left', 'right'), nominal_width_m=5,
+            specific_discharge_kg_per_rev_m=factor, start=start,
+            end=start + timedelta(seconds=60),
+        )
+        integrator = MaterialConsumptionIntegrator(MaterialIntegratorConfig(0.3, 20))
+        state = integrator.process_many(samples)
+        assert samples[0].material_rate_kg_per_hour == 2805.0
+        assert state.integrated_running_seconds == 20
+        outputs.append((application, samples, state))
+    assert outputs[0] == outputs[1]
+    assert outputs[0][0] == pytest.approx(4065.217391304348)
+
+
+def test_update_only_central_file(tmp_path):
+    path = tmp_path / BENTO.name
+    path.write_text(BENTO.read_text())
+    (tmp_path / CALIBRATIONS.name).write_text(CALIBRATIONS.read_text().replace('2.75', '2.8'))
+    assert load_material_calculation(path).specific_discharge_kg_per_rev_m == 2.8
+
+
+def test_k7_without_calibration_file(tmp_path):
+    original = Path('config/k7-material-consumption.yaml')
+    path = tmp_path / original.name
+    path.write_text(original.read_text())
+    assert load_material_calculation(path) == load_material_calculation(original)
+    assert load_material_calculation(path).calibration_ref is None

tests/test_context.py

@@ -0,0 +1,75 @@
+import pytest
+
+from production_analytics.context import (
+    build_enlyze_production_order,
+    extract_nominal_width_m,
+)
+
+K7_ORDER_TEMPLATE = "K 7-{production_order}"
+
+
+@pytest.mark.parametrize("order, expected", [
+    ("12026000815", "K 7-12026000815"),
+    (" \t12026000815\n", "K 7-12026000815"),
+    ("00123", "K 7-00123"),
+])
+def test_k7_mapping(order, expected):
+    assert build_enlyze_production_order(order, K7_ORDER_TEMPLATE) == expected
+
+
+@pytest.mark.parametrize("order", [
+    "", " \t", "K 7-12026000815", "K 7-12025000074-K 7-12025000075",
+    "12025000074-12025000075", "prefix12026000815", "12026000815suffix",
+    "12026 000815", "１２３", "-123",
+])
+def test_mapping_rejects_non_erp_identifiers(order):
+    with pytest.raises(ValueError, match="ERP production order"):
+        build_enlyze_production_order(order, K7_ORDER_TEMPLATE)
+
+
+@pytest.mark.parametrize("template, expected", [
+    ("EXAMPLE/{production_order}/finished", "EXAMPLE/00123/finished"),
+    ("{production_order}", "00123"),
+    ("{production_order}-example", "00123-example"),
+])
+def test_mapping_uses_explicit_template(template, expected):
+    assert build_enlyze_production_order(" 00123 ", template) == expected
+
+
+@pytest.mark.parametrize("template", [
+    "", "fixed-order", "{order}", "{production_order}-{production_order}",
+    "{production_order:>20}", "{production_order!r}", "{production_order}{unknown}",
+    "{{production_order}}",
+])
+def test_mapping_rejects_invalid_template(template):
+    with pytest.raises(ValueError, match="Format template"):
+        build_enlyze_production_order("12026000815", template)
+
+
+@pytest.mark.parametrize("description, expected", [
+    ("Stex R 1501  C (PR)   5,80 x  50 m", 5.8),
+    ("Stex R 401, 6,00 x 90 m", 6.0),
+    ("Stex R 1501 5.80 x 50 m", 5.8),
+    ("5,80x50 m", 5.8),
+    ("5,80x50m", 5.8),
+    ("Article 212520 grade 1501 5,80\t x\t50 m", 5.8),
+    ("5,80 x 50 m coated (batch 42)", 5.8),
+    ("(5,80 x 50 m), coated", 5.8),
+    ("6 x 90 m", 6.0),
+])
+def test_width(description, expected):
+    assert extract_nominal_width_m(description) == expected
+
+
+@pytest.mark.parametrize("description", [
+    None, "", "Stex R 1501", "5,80 m", "5,80 x 50", "5,80 x 50 cm",
+    "5,80 x 50 mm", "5,80 x 50 m²", "5,80 x 50 m2", "5,80 x 50 m/min",
+    "5,80 x 50 metres", "5,80,2 x 50 m", "5.80.2 x 50 m",
+    "5,80 x ? m", "5,80 x 50 m or 6,00 x 90 m", "2 x 5,80 x 50 m",
+    "5,80 x 50 m x 2", "0 x 50 m", "-5,80 x 50 m", "+5,80 x 50 m",
+    "nan x 50 m", "inf x 50 m", "Infinity x 50 m", "1e309 x 50 m",
+    "9" * 400 + " x 50 m", "5,80 x 0 m", "5,80 x -50 m", "5,80 x nan m",
+    "1/5,80 x 50 m", "abc5,80 x 50 m",
+])
+def test_width_fails_safely(description):
+    assert extract_nominal_width_m(description) is None

tests/test_enlyze_gateway.py

@@ -1,6 +1,8 @@
 from datetime import UTC, datetime
 from unittest.mock import Mock
 
+import pytest
+
 from production_analytics.enlyze.gateway import EnlyzeApiGateway
 
 
@@ -131,3 +133,221 @@ def test_get_material_samples_uses_column_names_not_fixed_positions() -> None:
 
     assert samples[0].material_rate_kg_per_hour == 1028.5
     assert samples[0].gate_value == 2.1
+
+
+@pytest.fixture
+def timeseries():
+    client = Mock()
+    client.post_json.return_value.body = {"data": {
+        "columns": ["time", "rate", "gate"], "records": [],
+    }}
+    args = dict(machine_id="m", rate_variable_id="rate", gate_variable_id="gate",
+                start=datetime(2026, 9, 3, tzinfo=UTC), end=datetime(2026, 9, 4, tzinfo=UTC))
+    return EnlyzeApiGateway(client), client, args
+
+
+@pytest.mark.parametrize("name", ["start", "end"])
+def test_naive_window_rejected(timeseries, name) -> None:
+    gateway, client, args = timeseries
+    args[name] = args[name].replace(tzinfo=None)
+    with pytest.raises(ValueError, match="timezone-aware"):
+        gateway.get_material_samples(**args)
+    client.post_json.assert_not_called()
+
+
+def test_reversed_window_rejected(timeseries) -> None:
+    gateway, client, args = timeseries
+    args["start"], args["end"] = args["end"], args["start"]
+    with pytest.raises(ValueError, match="precede"):
+        gateway.get_material_samples(**args)
+    client.post_json.assert_not_called()
+
+
+def test_empty_timeseries(timeseries) -> None:
+    gateway, client, args = timeseries
+    assert gateway.get_material_samples(**args) == []
+
+
+@pytest.mark.parametrize("column", ["time", "rate", "gate"])
+def test_missing_required_column(timeseries, column) -> None:
+    gateway, client, args = timeseries
+    client.post_json.return_value.body["data"]["columns"].remove(column)
+    with pytest.raises(ValueError, match="required column"):
+        gateway.get_material_samples(**args)
+
+
+@pytest.mark.parametrize("record", [[], {}, ["bad", 1, 1], [None, 1, 1],
+    ["2026-09-03T00:00:00", 1, 1], ["2026-09-03T00:00:00Z", None, 1],
+    ["2026-09-03T00:00:00Z", 1, float("inf")], ["2026-09-03T00:00:00Z", True, 1]])
+def test_malformed_records_fail_clearly(timeseries, record) -> None:
+    gateway, client, args = timeseries
+    client.post_json.return_value.body["data"]["records"] = [record]
+    with pytest.raises(ValueError, match="malformed record 0"):
+        gateway.get_material_samples(**args)
+
+
+def test_multiple_open_runs_rejected() -> None:
+    client = Mock()
+    run = dict(uuid="r", machine="m", production_order="o", start="2026-09-03T00:00:00Z",
+               end=None)
+    client.get.return_value.body = {"data": [run, {**run, "uuid": "r2"}]}
+    with pytest.raises(ValueError, match="multiple open Production Runs"):
+        EnlyzeApiGateway(client).get_open_production_run("m")
+
+
+@pytest.mark.parametrize("item", [{}, None, {"end": None},
+    dict(uuid="r", machine="m", production_order="o", start="bad", end=None)])
+def test_malformed_run_fails_clearly(item) -> None:
+    client = Mock()
+    client.get.return_value.body = {"data": [item]}
+    with pytest.raises(ValueError, match="Invalid production-run response"):
+        EnlyzeApiGateway(client).get_open_production_run("m")
+
+
+def test_timeseries_with_null_cursor(timeseries) -> None:
+    gateway, client, args = timeseries
+    client.post_json.return_value.body["metadata"] = {"next_cursor": None}
+    client.post_json.return_value.body["data"]["records"] = [
+        ["2026-09-03T00:00:00Z", 10, 2],
+    ]
+    samples = gateway.get_material_samples(**args)
+    assert len(samples) == 1
+    assert samples[0].material_rate_kg_per_hour == 10
+    client.post_json.assert_called_once()
+
+
+def test_timeseries_pagination_resolves_columns_per_page(timeseries) -> None:
+    gateway, client, args = timeseries
+    client.post_json.side_effect = [
+        Mock(body={
+            "data": {"columns": ["time", "rate", "gate"],
+                     "records": [["2026-09-03T00:00:00Z", 10, 2]]},
+            "metadata": {"next_cursor": "continuation"},
+        }),
+        Mock(body={
+            "data": {"columns": ["gate", "time", "rate"],
+                     "records": [[3, "2026-09-03T01:00:00Z", 20]]},
+            "metadata": {"next_cursor": None},
+        }),
+    ]
+    samples = gateway.get_material_samples(**args)
+    assert [(s.timestamp, s.material_rate_kg_per_hour, s.gate_value) for s in samples] == [
+        (datetime(2026, 9, 3, tzinfo=UTC), 10, 2),
+        (datetime(2026, 9, 3, 1, tzinfo=UTC), 20, 3),
+    ]
+    assert client.post_json.call_count == 2
+    first, second = client.post_json.call_args_list
+    assert first.args == ("/v2/timeseries", {
+        "machine": "m", "start": args["start"].isoformat(), "end": args["end"].isoformat(),
+        "variables": [{"uuid": "rate"}, {"uuid": "gate"}],
+    })
+    assert second.args == ("/v2/timeseries", {**first.args[1], "cursor": "continuation"})
+
+
+@pytest.mark.parametrize("metadata", [None, [], "bad", {},
+    {"next_cursor": ""}, {"next_cursor": 1}, {"next_cursor": False},
+    {"next_cursor": []}, {"next_cursor": {}}])
+def test_invalid_pagination_metadata(timeseries, metadata) -> None:
+    gateway, client, args = timeseries
+    client.post_json.return_value.body["metadata"] = metadata
+    with pytest.raises(ValueError, match="Invalid timeseries response.*next_cursor"):
+        gateway.get_material_samples(**args)
+    client.post_json.assert_called_once()
+
+
+@pytest.mark.parametrize("cursors", [["a", "a"], ["a", "b", "a"]])
+def test_repeated_pagination_cursor(timeseries, cursors) -> None:
+    gateway, client, args = timeseries
+    data = client.post_json.return_value.body["data"]
+    client.post_json.side_effect = [
+        Mock(body={"data": data, "metadata": {"next_cursor": cursor}}) for cursor in cursors
+    ]
+    with pytest.raises(ValueError, match="next_cursor has already been followed"):
+        gateway.get_material_samples(**args)
+    assert client.post_json.call_count == len(cursors)
+
+
+@pytest.mark.parametrize("data, error", [
+    ({"columns": ["time", "rate", "gate"], "records": [[]]}, "malformed record 0"),
+    ({"columns": ["time", "rate", "rate", "gate"], "records": []}, "required column"),
+    ({"columns": ["time", "rate"], "records": []}, "required column"),
+    ({"columns": None, "records": []}, "columns must be a list"),
+    ({"columns": ["time", "rate", "gate"], "records": None}, "records must be a list"),
+    ({"columns": ["time", "rate", "gate"],
+      "records": [["2026-09-03T01:00:00", 10, 2]]}, "timezone-aware"),
+    ({"columns": ["time", "rate", "gate"],
+      "records": [["2026-09-03T01:00:00Z", float("nan"), 2]]}, "finite"),
+    ({"columns": ["time", "rate", "gate"],
+      "records": [["2026-09-03T01:00:00Z", 10, True]]}, "numeric"),
+])
+def test_malformed_later_page(timeseries, data, error) -> None:
+    gateway, client, args = timeseries
+    first_body = client.post_json.return_value.body
+    first_body["metadata"] = {"next_cursor": "continuation"}
+    client.post_json.side_effect = [
+        Mock(body=first_body), Mock(body={"data": data, "metadata": {"next_cursor": None}}),
+    ]
+    with pytest.raises(ValueError, match=f"Invalid timeseries response on page 2:.*{error}"):
+        gateway.get_material_samples(**args)
+    assert client.post_json.call_count == 2
+
+
+def test_production_runs_follow_pages_and_find_open_run() -> None:
+    client = Mock()
+    closed = dict(uuid="closed", machine="m", production_order="opaque-order",
+                  start="2026-09-01T00:00:00Z", end="2026-09-01T01:00:00Z")
+    opened = {**closed, "uuid": "open", "end": None}
+    pages = [
+        Mock(body={"data": [closed], "metadata": {"next_cursor": "a"}}),
+        Mock(body={"data": [opened], "metadata": {"next_cursor": None}}),
+    ]
+    client.get.side_effect = pages
+    gateway = EnlyzeApiGateway(client)
+    runs = gateway.get_production_runs("m")
+    assert [run.uuid for run in runs] == ["closed", "open"]
+    assert runs[0].end == datetime(2026, 9, 1, 1, tzinfo=UTC)
+    assert [call.args for call in client.get.call_args_list] == [
+        ("/v2/production-runs", {"machine": "m"}),
+        ("/v2/production-runs", {"machine": "m", "cursor": "a"}),
+    ]
+    client.get.side_effect = pages
+    assert gateway.get_open_production_run("m") == runs[1]
+
+
+@pytest.mark.parametrize("metadata", [
+    None, [], "bad", {}, {"next_cursor": ""}, {"next_cursor": 1},
+    {"next_cursor": False}, {"next_cursor": []}, {"next_cursor": {}},
+])
+def test_production_run_invalid_pagination(metadata) -> None:
+    client = Mock()
+    client.get.return_value.body = {"data": [], "metadata": metadata}
+    with pytest.raises(ValueError, match="Invalid production-run response.*next_cursor"):
+        EnlyzeApiGateway(client).get_production_runs("m")
+
+
+@pytest.mark.parametrize("cursors", [["a", "a"], ["a", "b", "a"]])
+def test_production_run_cyclic_pagination(cursors) -> None:
+    client = Mock()
+    client.get.side_effect = [
+        Mock(body={"data": [], "metadata": {"next_cursor": cursor}})
+        for cursor in cursors
+    ]
+    with pytest.raises(ValueError, match="next_cursor has already been followed"):
+        EnlyzeApiGateway(client).get_production_runs("m")
+    assert client.get.call_count == len(cursors)
+
+
+@pytest.mark.parametrize("body", [
+    None, [], {}, {"data": {}}, {"data": [None]},
+    {"data": [dict(uuid="r", machine="wrong", production_order="o",
+                   start="2026-09-03T00:00:00Z", end=None)]},
+    {"data": [dict(uuid="r", machine="m", production_order="o",
+                   start="2026-09-03T00:00:00Z", end="2026-09-02T00:00:00Z")]},
+])
+def test_production_run_malformed_later_page(body) -> None:
+    client = Mock()
+    client.get.side_effect = [
+        Mock(body={"data": [], "metadata": {"next_cursor": "a"}}), Mock(body=body),
+    ]
+    with pytest.raises(ValueError, match="Invalid production-run response on page 2"):
+        EnlyzeApiGateway(client).get_production_runs("m")

tests/test_erp_gateway.py

@@ -0,0 +1,187 @@
+import re
+import traceback
+from dataclasses import FrozenInstanceError, replace
+from datetime import UTC, datetime
+from decimal import Decimal
+from unittest.mock import MagicMock
+
+import pytest
+
+from production_analytics.enlyze.exploration import ConfigurationError
+from production_analytics.erp import ErpReadError, ErpSettings, ErpWorkplaceStatusGateway
+
+ENV = dict(ERP_DB_HOST='localhost', ERP_DB_PORT='49601', ERP_DB_NAME='NV_DWH',
+           ERP_DB_USER='private-user', ERP_DB_PASSWORD='private-password')
+NOW = datetime(2026, 9, 4, 21, 20, 50)
+ROW = ('K7       ', '12026000815  ', '212520                ',
+       'Stex R 1501  C (PR)   5,80 x  50 m   ', NOW,
+       Decimal('80040.000'), Decimal('69281.000'), Decimal('10759.000'), 17, 38)
+
+
+def test_valid_settings():
+    settings = ErpSettings.from_environment(ENV)
+    assert (settings.host, settings.port, settings.database) == ('localhost', 49601, 'NV_DWH')
+    assert settings.user == ENV['ERP_DB_USER']
+    assert settings.password == ENV['ERP_DB_PASSWORD']
+    assert settings.user not in repr(settings)
+    assert settings.password not in repr(settings)
+
+
+@pytest.mark.parametrize('key', ENV)
+@pytest.mark.parametrize('value', [None, '', '  ', '\x00'])
+def test_required_settings(key, value):
+    environment = dict(ENV)
+    if value is None:
+        del environment[key]
+    else:
+        environment[key] = value
+    with pytest.raises(ConfigurationError, match=key):
+        ErpSettings.from_environment(environment)
+
+
+@pytest.mark.parametrize('port', ['0', '-1', '65536', '1.5', 'private-password'])
+def test_invalid_port(port):
+    with pytest.raises(ConfigurationError, match='ERP_DB_PORT') as error:
+        ErpSettings.from_environment(dict(ENV, ERP_DB_PORT=port))
+    assert 'private-password' not in ''.join(traceback.format_exception(error.value))
+
+
+@pytest.mark.parametrize('port', [1, 65535])
+def test_port_boundaries(port):
+    assert ErpSettings.from_environment(dict(ENV, ERP_DB_PORT=str(port))).port == port
+
+
+@pytest.mark.parametrize('changes', [{'port': True}, {'port': 1.5}, {'host': ''},
+                                     {'database': ''}, {'user': ''}, {'password': ''}])
+def test_direct_settings_validation(changes):
+    with pytest.raises(ConfigurationError):
+        replace(ErpSettings.from_environment(ENV), **changes)
+
+
+def test_secret_file(tmp_path):
+    path = tmp_path / 'erp.env'
+    path.write_text("ERP_DB_PASSWORD='file password'\n")
+    assert ErpSettings.from_secret_file(path, environment=ENV).password == 'file password'
+    assert ErpSettings.from_secret_file(tmp_path / 'missing', environment=ENV).port == 49601
+    path.write_text("ERP_DB_PASSWORD='private-password\n")
+    with pytest.raises(ConfigurationError) as error:
+        ErpSettings.from_secret_file(path, environment=ENV)
+    assert 'private-password' not in ''.join(traceback.format_exception(error.value))
+
+
+@pytest.fixture
+def db(monkeypatch):
+    connect = MagicMock()
+    monkeypatch.setattr('production_analytics.erp.gateway.pymssql.connect', connect)
+    connection = connect.return_value.__enter__.return_value
+    cursor = connection.cursor.return_value.__enter__.return_value
+    cursor.fetchmany.return_value = [ROW]
+    return connect, connection, cursor
+
+
+def read():
+    return ErpWorkplaceStatusGateway(ErpSettings.from_environment(ENV))
+
+
+def test_valid_row_and_resource_lifecycle(db):
+    connect, connection, cursor = db
+    status = read().get_current_workplace_status('K7')
+    assert status.workplace == 'K7'
+    assert status.production_order == '12026000815'
+    assert status.article_number == '212520'
+    assert status.article_description == 'Stex R 1501  C (PR)   5,80 x  50 m'
+    assert status.feedback_timestamp is NOW
+    assert status.feedback_timestamp.tzinfo is None
+    assert (status.order_quantity_m2, status.good_quantity_m2, status.remaining_quantity_m2,
+            status.remaining_time_hours, status.remaining_rolls) == (
+                80040., 69281., 10759., 17., 38.,
+            )
+    assert type(status.order_quantity_m2) is float
+    with pytest.raises(FrozenInstanceError):
+        status.workplace = 'other'
+    cursor.fetchmany.assert_called_once_with(2)
+    connection.cursor.return_value.__exit__.assert_called_once()
+    connect.return_value.__exit__.assert_called_once()
+    connect.assert_called_once_with(server='localhost', port=49601, database='NV_DWH',
+                                    user='private-user', password='private-password',
+                                    login_timeout=10, timeout=10)
+    connection.commit.assert_not_called()
+
+
+def test_leading_whitespace_and_timezone_preserved(db):
+    row = list(ROW)
+    row[:4] = [' K7 ', ' K 7-001 ', ' 001 ', ' description  ']
+    row[4] = NOW.replace(tzinfo=UTC)
+    db[2].fetchmany.return_value = [row]
+    status = read().get_current_workplace_status(' K7')
+    assert (status.workplace, status.production_order, status.article_number,
+            status.article_description) == (' K7', ' K 7-001', ' 001', ' description')
+    assert status.feedback_timestamp is row[4]
+
+
+def test_nullable_fields(db):
+    db[2].fetchmany.return_value = [('K7', '001', None, None, NOW, *([None] * 5))]
+    status = read().get_current_workplace_status('K7')
+    assert all(getattr(status, key) is None for key in (
+        'article_number', 'article_description', 'order_quantity_m2', 'good_quantity_m2',
+        'remaining_quantity_m2', 'remaining_time_hours', 'remaining_rolls',
+    ))
+
+
+@pytest.mark.parametrize('value', [Decimal('NaN'), Decimal('Infinity'), Decimal('1e999'),
+                                   float('nan'), True, 'private-password'])
+def test_invalid_numbers(db, value):
+    row = list(ROW)
+    row[5] = value
+    db[2].fetchmany.return_value = [row]
+    with pytest.raises(ErpReadError, match='invalid row') as error:
+        read().get_current_workplace_status('K7')
+    assert 'private-password' not in ''.join(traceback.format_exception(error.value))
+
+
+def test_fractional_decimal(db):
+    row = list(ROW)
+    row[5:] = [Decimal('12.125')] * 5
+    db[2].fetchmany.return_value = [row]
+    status = read().get_current_workplace_status('K7')
+    assert status.order_quantity_m2 == status.remaining_rolls == 12.125
+
+
+def test_zero_rows(db):
+    db[2].fetchmany.return_value = []
+    assert read().get_current_workplace_status('K7') is None
+
+
+def test_multiple_rows(db):
+    db[2].fetchmany.return_value = [ROW, ROW]
+    with pytest.raises(ErpReadError, match='multiple rows'):
+        read().get_current_workplace_status('K7')
+
+
+def test_parameterized_read_only_query(db):
+    workplace = "K7'; DELETE FROM anything; --"
+    read().get_current_workplace_status(workplace)
+    db[2].execute.assert_called_once()
+    sql, params = db[2].execute.call_args.args
+    assert params == (workplace,)
+    assert workplace not in sql
+    assert 'WHERE [Arbeitsplatz] = %s' in sql
+    assert re.findall(r'FROM\s+(\S+)', sql) == ['[dbo].[GRAFANA_WORKPLACE_STATUS]']
+    assert not re.search(r'\b(INSERT|UPDATE|DELETE|MERGE|EXEC|TOP|ORDER BY)\b', sql, re.I)
+    assert sql.lstrip().startswith('SELECT')
+
+
+@pytest.mark.parametrize('stage', ['connect', 'execute', 'fetch', 'cursor_close', 'close'])
+def test_driver_errors_are_safe(db, stage):
+    connect, connection, cursor = db
+    target = {'connect': connect, 'execute': cursor.execute, 'fetch': cursor.fetchmany,
+              'cursor_close': connection.cursor.return_value.__exit__,
+              'close': connect.return_value.__exit__}[stage]
+    target.side_effect = RuntimeError('private-user private-password')
+    with pytest.raises(ErpReadError, match='read failed') as error:
+        read().get_current_workplace_status('K7')
+    rendered = ''.join(traceback.format_exception(error.value))
+    assert 'private-user' not in rendered
+    assert 'private-password' not in rendered
+    if stage != 'connect':
+        connect.return_value.__exit__.assert_called_once()

tests/test_material_application.py

@@ -0,0 +1,158 @@
+from datetime import UTC, datetime, timedelta
+from pathlib import Path
+from unittest.mock import MagicMock, Mock
+
+import psycopg
+import pytest
+import yaml
+
+from production_analytics.calculations.config import (
+    CalculationConfigError,
+    load_material_calculation,
+)
+from production_analytics.calculations.material_application import rotational_application_g_m2
+from production_analytics.calculations.material_consumption import MaterialSample
+from production_analytics.enlyze.gateway import EnlyzeApiGateway, EnlyzeProductionRun
+from production_analytics.service.material_polling import MaterialPollingService
+from production_analytics.service.postgres_material import PostgresSettings
+from production_analytics.service.postgres_material_application import (
+    PostgresMaterialApplicationWriter,
+)
+
+NOW = datetime(2026, 9, 7, tzinfo=UTC)
+
+
+def test_realistic_application_and_generic_factor():
+    assert rotational_application_g_m2([3.739, 3.956], 3.12, 8, 0.3) == pytest.approx(3001.05)
+    assert rotational_application_g_m2([2, 3], 1.5, 10, 0.5) == 750
+
+
+@pytest.mark.parametrize('speed', [-10, 0, 1e-300, 0.299999999, 0.3])
+def test_inactive_and_near_zero(speed):
+    assert rotational_application_g_m2([3.739, 3.956], 3.12, speed, 0.3) is None
+
+
+@pytest.mark.parametrize('speeds,factor,speed,threshold', [
+    ([], 3.12, 8, 0.3), ([float('nan')], 3.12, 8, 0.3),
+    ([1], 0, 8, 0.3), ([1], float('inf'), 8, 0.3),
+    ([1], 3.12, float('nan'), 0.3), ([1], 3.12, 8, 0),
+    ([1], 3.12, 8, float('inf')), ([1e308], 3.12, 8, 0.3),
+])
+def test_invalid_inputs(speeds, factor, speed, threshold):
+    with pytest.raises(ValueError):
+        rotational_application_g_m2(speeds, factor, speed, threshold)
+
+
+@pytest.mark.parametrize('width', [1, 4.85, 5, 100])
+def test_gateway_width_cancels_and_only_act_signals_requested(width):
+    config = load_material_calculation('config/bento1-material-consumption.yaml')
+    refs = [*config.rotational_speed_signal_refs, config.gate_signal_ref]
+    client = Mock()
+    client.post_json.return_value.body = {'data': {
+        'columns': ['time', *refs],
+        'records': [[NOW.isoformat(), 3.739, 3.956, 8],
+                    [(NOW + timedelta(seconds=10)).isoformat(), 3.739, 3.956, 0]],
+    }}
+    samples = EnlyzeApiGateway(client).get_material_samples(
+        machine_id=config.machine_ref, rate_variable_id='unused',
+        gate_variable_id=config.gate_signal_ref, start=NOW, end=NOW + timedelta(seconds=10),
+        rotational_speed_variable_ids=config.rotational_speed_signal_refs,
+        nominal_width_m=width, specific_discharge_kg_per_rev_m=3.12,
+        process_application_gate_threshold=0.3,
+    )
+    assert samples[0].application_g_m2 == pytest.approx(3001.05)
+    assert samples[1].application_g_m2 is None
+    assert samples[0].material_rate_kg_per_hour == pytest.approx(7.695 * width * 3.12 * 60)
+    assert client.post_json.call_args.args[1]['variables'] == [{'uuid': ref} for ref in refs]
+
+
+@pytest.mark.parametrize('changes', [
+    {'process_application_calculation_id': ''}, {'process_application_calculation_id': None},
+    {'process_application_calculation_id': 3}, {'process_application_calculation_id': 'x\x00'},
+    {'process_application_calculation_id': 'bento1-fresh-bentonite-consumption'},
+    {'gate_signal_ref': None}, {'gate_threshold': 0}, {'gate_threshold': -0.3},
+])
+def test_process_config_validation(tmp_path, changes):
+    document = yaml.safe_load(Path('config/bento1-material-consumption.yaml').read_text())
+    document['calculations'][0].update(changes)
+    path = tmp_path / 'config.yaml'
+    path.write_text(yaml.safe_dump(document))
+    with pytest.raises(CalculationConfigError):
+        load_material_calculation(path)
+
+
+def test_persistence_before_checkpoint_retries_and_disjoint_runs():
+    old = EnlyzeProductionRun('old', 'machine', None, 'order', NOW, NOW + timedelta(seconds=10))
+    current = EnlyzeProductionRun(
+        'new', 'machine', None, 'order', NOW + timedelta(seconds=15), None,
+    )
+    gateway = Mock()
+    gateway.get_open_production_run.return_value = current
+    gateway.get_production_runs.return_value = [old, current]
+
+    def samples(**kwargs):
+        start = kwargs['start']
+        assert kwargs['process_application_gate_threshold'] == 0.3
+        return [MaterialSample(start, 7202.52, 8, 3001.05),
+                MaterialSample(start + timedelta(seconds=10), 7202.52, 8, 3001.05)]
+
+    gateway.get_material_samples.side_effect = samples
+    store = Mock(load=Mock(return_value=None))
+    writer = Mock()
+    writer.write.side_effect = [None, psycopg.OperationalError(), None, None]
+    service = MaterialPollingService(
+        gateway=gateway, state_store=store, machine_id='machine', rate_variable_id='unused',
+        gate_variable_id='speed', gate_threshold=0.3, max_sample_gap_seconds=20,
+        rotational_speed_variable_ids=('right', 'left'), specific_discharge_kg_per_rev_m=3.12,
+        nominal_width_provider=lambda order: 5, process_application_calculation_id='application',
+        application_writer=writer,
+    )
+    with pytest.raises(psycopg.OperationalError):
+        service.poll_once(now=NOW + timedelta(seconds=25))
+    store.save.assert_not_called()
+    result = service.poll_once(now=NOW + timedelta(seconds=25))
+    assert result.state.cumulative_consumption_kg == pytest.approx(40.014)
+    assert result.state.integrated_running_seconds == 20
+    assert [c.kwargs['run_id'] for c in writer.write.call_args_list] == ['old', 'new', 'old', 'new']
+    store.save.assert_called_once()
+
+
+def test_sql_persistence_idempotent_and_inactive_omitted(monkeypatch):
+    import sqlite3
+
+    database = sqlite3.connect(':memory:')
+    database.executescript(Path('db/schema.sql').read_text())
+    connection = MagicMock()
+    cursor = connection.__enter__.return_value.cursor.return_value.__enter__.return_value
+    cursor.executemany.side_effect = lambda sql, rows: database.executemany(
+        sql.replace('%s', '?'),
+        [(row[0].isoformat(), *row[1:]) for row in rows],
+    )
+    connect = Mock(return_value=connection)
+    monkeypatch.setattr(psycopg, 'connect', connect)
+    writer = PostgresMaterialApplicationWriter(PostgresSettings('host', 5432, 'db', 'u', 'p'))
+    kwargs = dict(calculation_id='application', machine_id='machine', production_order='order',
+                  run_id='run', samples=[MaterialSample(NOW, 7202.52, 8, 3001.05),
+                                        MaterialSample(NOW + timedelta(seconds=10), 7202.52, 0)])
+    writer.write(**kwargs)
+    writer.write(**kwargs)
+    assert database.execute('SELECT * FROM material_application_snapshots').fetchall() == [
+        (NOW.isoformat(), 'application', 'machine', 'order', 'run', 3001.05),
+    ]
+    writer.write(**(kwargs | {'samples': [MaterialSample(NOW, 1, 0)]}))
+    assert connect.call_count == 2
+    database.close()
+
+
+@pytest.mark.parametrize('collision', ['output', 'consumption'])
+def test_output_ids_unique_across_config_entries(tmp_path, collision):
+    document = yaml.safe_load(Path('config/bento1-material-consumption.yaml').read_text())
+    first = document['calculations'][0]
+    second = dict(first, id='second-consumption')
+    if collision == 'consumption':
+        second['process_application_calculation_id'] = first['id']
+    document['calculations'].append(second)
+    path = tmp_path / 'config.yaml'
+    path.write_text(yaml.safe_dump(document))
+    with pytest.raises(CalculationConfigError, match='unique'):
+        load_material_calculation(path, first['id'])

tests/test_material_efficiency.py

@@ -0,0 +1,186 @@
+from dataclasses import FrozenInstanceError, replace
+from datetime import UTC, datetime
+from unittest.mock import Mock
+from zoneinfo import ZoneInfo
+
+import pytest
+
+from production_analytics.erp import CurrentWorkplaceStatus
+from production_analytics.service.material_efficiency import MaterialEfficiencyService
+from production_analytics.service.postgres_material import MaterialConsumptionSnapshot
+
+CALC = 'k7-fiber-consumption'
+MACHINE = 'c220f95c-a65e-4cb7-99b7-0626d6c7508c'
+START = datetime(2026, 9, 4, 10, tzinfo=UTC)
+FEEDBACK = START.replace(minute=5)
+STATUS = CurrentWorkplaceStatus(
+    'K7', '12026000815', '212520', 'Stex R 1501 C (PR) 5,80 x 50 m',
+    FEEDBACK, None, 800, None, None, None,
+)
+MATERIAL = MaterialConsumptionSnapshot(START, CALC, MACHINE, 'K 7-12026000815', 'run', 1000)
+
+
+def service(repository=None, **config):
+    return MaterialEfficiencyService(
+        Mock(get_current_workplace_status=Mock(return_value=STATUS)),
+        repository if repository is not None else Mock(latest_at_or_before=Mock(
+            return_value=MATERIAL,
+        )),
+        **dict(workplace='K7', machine_id=MACHINE, calculation_id=CALC,
+               format_template='K 7-{production_order}', **config),
+    )
+
+
+def test_valid_current_feedback():
+    subject = service()
+    result = subject.evaluate_current()
+    assert result.material_consumption_kg_per_m2 == 1.25
+    assert result.material_consumption_g_per_m2 == 1250
+    assert result.nominal_width_m == 5.8
+    assert result.good_quantity_m2 == 800
+    assert result.material_consumption_kg == 1000
+    assert result.erp_feedback_timestamp == FEEDBACK
+    assert result.material_snapshot_timestamp == START
+    assert (result.workplace, result.machine_id, result.calculation_id) == ('K7', MACHINE, CALC)
+    assert (result.erp_production_order, result.enlyze_production_order) == (
+        '12026000815', 'K 7-12026000815',
+    )
+    assert (result.article_number, result.article_description) == (
+        STATUS.article_number, STATUS.article_description,
+    )
+    subject.erp.get_current_workplace_status.assert_called_once_with('K7')
+    subject.materials.latest_at_or_before.assert_called_once_with(
+        calculation_id=CALC, machine_id=MACHINE, production_order='K 7-12026000815',
+        timestamp=FEEDBACK,
+    )
+    with pytest.raises(FrozenInstanceError):
+        result.good_quantity_m2 = 5
+
+
+@pytest.mark.parametrize('quantity', [None, 0, -1, float('nan'), float('inf'), -float('inf')])
+def test_invalid_quantity(quantity):
+    subject = service()
+    assert subject.evaluate(replace(STATUS, good_quantity_m2=quantity)) is None
+    subject.materials.latest_at_or_before.assert_not_called()
+
+
+@pytest.mark.parametrize('description', [None, 'unstructured article'])
+def test_width_is_optional_context(description):
+    result = service().evaluate(replace(STATUS, article_description=description))
+    assert result.nominal_width_m is None
+    assert result.material_consumption_kg_per_m2 == 1.25
+
+
+def test_unavailable_sources():
+    subject = service()
+    subject.erp.get_current_workplace_status.return_value = None
+    assert subject.evaluate_current() is None
+    subject.materials.latest_at_or_before.return_value = None
+    assert subject.evaluate(STATUS) is None
+
+
+@pytest.mark.parametrize('consumption, quantity', [
+    (float('nan'), 800), (float('inf'), 800), (-1, 800),
+    (1e308, 1e-308), (1e308, 1),
+])
+def test_invalid_consumption_and_overflow(consumption, quantity):
+    subject = service()
+    subject.materials.latest_at_or_before.return_value = replace(
+        MATERIAL, consumption_kg=consumption,
+    )
+    assert subject.evaluate(replace(STATUS, good_quantity_m2=quantity)) is None
+
+
+def test_zero_consumption_is_valid():
+    subject = service()
+    subject.materials.latest_at_or_before.return_value = replace(MATERIAL, consumption_kg=0)
+    assert subject.evaluate(STATUS).material_consumption_kg_per_m2 == 0
+
+
+@pytest.mark.parametrize('changes', [
+    dict(timestamp=START.replace(minute=10)), dict(timestamp=START.replace(tzinfo=None)),
+    dict(production_order='K 7-12026000815-K 7-12026000816'),
+    dict(machine_id='other'), dict(calculation_id='other'),
+])
+def test_repository_contract_is_checked(changes):
+    subject = service()
+    subject.materials.latest_at_or_before.return_value = replace(MATERIAL, **changes)
+    with pytest.raises(ValueError, match='unaligned'):
+        subject.evaluate(STATUS)
+
+
+def test_other_explicit_configuration():
+    repository = Mock()
+    repository.latest_at_or_before.return_value = replace(
+        MATERIAL, machine_id='example-machine', production_order='ORDER/00123',
+    )
+    subject = MaterialEfficiencyService(
+        Mock(), repository, workplace='example', machine_id='example-machine',
+        calculation_id=CALC, format_template='ORDER/{production_order}',
+    )
+    result = subject.evaluate(replace(STATUS, workplace='example', production_order=' 00123 '))
+    assert result.enlyze_production_order == 'ORDER/00123'
+
+
+def test_wrong_workplace_and_combined_order_rejected():
+    with pytest.raises(ValueError, match='workplace'):
+        service().evaluate(replace(STATUS, workplace='other'))
+    with pytest.raises(ValueError, match='ERP production order'):
+        service().evaluate(replace(STATUS, production_order='K 7-123-K 7-456'))
+
+
+def test_temporal_regression_and_successive_feedback():
+    later = replace(
+        MATERIAL, timestamp=START.replace(minute=10), consumption_kg=1100, run_id='run2',
+    )
+    repository = Mock()
+    repository.latest_at_or_before.side_effect = lambda **kw: max(
+        (row for row in [MATERIAL, later] if row.timestamp <= kw['timestamp']),
+        key=lambda row: row.timestamp, default=None,
+    )
+    subject = service(repository)
+    first = subject.evaluate(STATUS)
+    second = subject.evaluate(replace(
+        STATUS, feedback_timestamp=later.timestamp, good_quantity_m2=1000,
+    ))
+    assert first.material_snapshot_timestamp == START
+    assert first.material_consumption_kg == 1000
+    assert first.material_consumption_kg_per_m2 == 1.25
+    assert second.material_snapshot_timestamp == later.timestamp
+    assert second.material_consumption_kg == 1100
+    assert second.material_consumption_kg_per_m2 == 1.1
+    assert first.good_quantity_m2 == 800
+
+
+def test_naive_feedback_requires_explicit_timezone_and_returns_instant():
+    naive = datetime(2026, 9, 4, 12, 5)
+    status = replace(STATUS, feedback_timestamp=naive)
+    with pytest.raises(ValueError, match='explicit erp_timezone'):
+        service().evaluate(status)
+    subject = service(erp_timezone=ZoneInfo('Europe/Berlin'))
+    result = subject.evaluate(status)
+    assert result.erp_feedback_timestamp == FEEDBACK
+    assert status.feedback_timestamp == naive
+    assert subject.materials.latest_at_or_before.call_args.kwargs['timestamp'] == FEEDBACK
+
+
+@pytest.mark.parametrize('timestamp', [datetime(2026, 3, 29, 2, 30), datetime(2026, 10, 25, 2, 30)])
+def test_dst_gap_and_overlap_rejected(timestamp):
+    with pytest.raises(ValueError, match='ambiguous or nonexistent'):
+        service(erp_timezone=ZoneInfo('Europe/Berlin')).evaluate(
+            replace(STATUS, feedback_timestamp=timestamp),
+        )
+
+
+def test_aware_feedback_returns_utc():
+    timestamp = FEEDBACK.astimezone(ZoneInfo('Europe/Berlin'))
+    result = service().evaluate(replace(STATUS, feedback_timestamp=timestamp))
+    assert result.erp_feedback_timestamp == timestamp
+    assert result.erp_feedback_timestamp.tzinfo is UTC
+
+
+def test_database_failure_propagates():
+    subject = service()
+    subject.materials.latest_at_or_before.side_effect = RuntimeError('unavailable')
+    with pytest.raises(RuntimeError, match='unavailable'):
+        subject.evaluate(STATUS)

tests/test_material_efficiency_persistence.py

@@ -0,0 +1,488 @@
+import io
+import sqlite3
+from dataclasses import replace
+from datetime import UTC, datetime
+from pathlib import Path
+from unittest.mock import MagicMock, Mock
+
+import psycopg
+import pytest
+import yaml
+
+from production_analytics.calculations.config import CalculationConfigError
+from production_analytics.cli.__main__ import main
+from production_analytics.erp import CurrentWorkplaceStatus, ErpReadError
+from production_analytics.service.material_efficiency import (
+    MaterialEfficiencySnapshot,
+)
+from production_analytics.service.material_efficiency_runner import MaterialEfficiencyRunner
+from production_analytics.service.material_efficiency_runtime import (
+    build_material_efficiency_runner,
+)
+from production_analytics.service.postgres_material import (
+    MaterialConsumptionSnapshot,
+    PostgresSettings,
+)
+from production_analytics.service.postgres_material_efficiency import (
+    PostgresMaterialEfficiencyWriter,
+)
+
+NOW = datetime(2026, 9, 4, 10, tzinfo=UTC)
+SNAPSHOT = MaterialEfficiencySnapshot(
+    "example",
+    "machine",
+    "calc",
+    "00123",
+    " ORDER/00123'; -- ",
+    "article",
+    "fabric 5 x 50 m",
+    5,
+    NOW,
+    NOW,
+    800,
+    1000,
+    1.25,
+    1250,
+)
+SETTINGS = PostgresSettings("localhost", 5432, "analytics", "writer", "secret")
+
+
+@pytest.fixture
+def storage(monkeypatch):
+    # Real schema and INSERT semantics, with only driver transport adapted for SQLite.
+    database = sqlite3.connect(":memory:")
+    database.executescript(Path("db/schema.sql").read_text())
+    connection = MagicMock()
+
+    def execute(sql, params):
+        assert sql.lstrip().startswith("INSERT INTO")
+        assert "SELECT" not in sql.upper()
+        assert "RETURNING 1" in sql
+        assert sql.count("%s") == 14
+        assert SNAPSHOT.enlyze_production_order not in sql
+        return database.execute(
+            sql.replace("%s", "?"),
+            tuple(value.isoformat() if isinstance(value, datetime) else value for value in params),
+        )
+
+    connection.__enter__.return_value.execute.side_effect = execute
+    connect = Mock(return_value=connection)
+    monkeypatch.setattr(psycopg, "connect", connect)
+    yield database, connect, connection
+    database.close()
+
+
+@pytest.mark.parametrize("nullable", [False, True])
+def test_all_fields_and_immutable_event(storage, nullable):
+    database, connect, connection = storage
+    snapshot = (
+        replace(SNAPSHOT, article_number=None, article_description=None, nominal_width_m=None)
+        if nullable
+        else SNAPSHOT
+    )
+    writer = PostgresMaterialEfficiencyWriter(SETTINGS)
+    assert writer.write(snapshot) is True
+    inserted = writer.write(
+        replace(
+            snapshot,
+            material_consumption_kg=9999,
+            material_snapshot_timestamp=NOW.replace(minute=1),
+        )
+    )
+    assert inserted is False
+    assert connection.__enter__.return_value.execute.call_count == 2
+    assert database.execute("SELECT * FROM material_efficiency_snapshots").fetchall() == [
+        (
+            NOW.isoformat(),
+            NOW.isoformat(),
+            "calc",
+            "machine",
+            "example",
+            "00123",
+            SNAPSHOT.enlyze_production_order,
+            snapshot.article_number,
+            snapshot.article_description,
+            snapshot.nominal_width_m,
+            800,
+            1000,
+            1.25,
+            1250,
+        )
+    ]
+    assert connect.call_count == 2
+    assert connect.call_args.kwargs["connect_timeout"] == 10
+    connection.__exit__.assert_called_with(None, None, None)
+
+
+@pytest.mark.parametrize(
+    "field,value",
+    [
+        ("calculation_id", "other"),
+        ("machine_id", "other"),
+        ("enlyze_production_order", SNAPSHOT.enlyze_production_order.strip()),
+        ("enlyze_production_order", SNAPSHOT.enlyze_production_order + "-combined"),
+        ("erp_feedback_timestamp", NOW.replace(minute=1)),
+    ],
+)
+def test_exact_identity(storage, field, value):
+    writer = PostgresMaterialEfficiencyWriter(SETTINGS)
+    writer.write(SNAPSHOT)
+    writer.write(replace(SNAPSHOT, **{field: value}))
+    assert storage[0].execute("SELECT count(*) FROM material_efficiency_snapshots").fetchone() == (
+        2,
+    )
+
+
+@pytest.mark.parametrize("field", ["erp_feedback_timestamp", "material_snapshot_timestamp"])
+def test_naive_rejected(storage, field):
+    with pytest.raises(ValueError, match="timezone-aware"):
+        PostgresMaterialEfficiencyWriter(SETTINGS).write(
+            replace(SNAPSHOT, **{field: NOW.replace(tzinfo=None)}),
+        )
+    storage[1].assert_not_called()
+
+
+@pytest.mark.parametrize(
+    "field",
+    [
+        "nominal_width_m",
+        "good_quantity_m2",
+        "material_consumption_kg",
+        "material_consumption_kg_per_m2",
+        "material_consumption_g_per_m2",
+    ],
+)
+@pytest.mark.parametrize("value", [float("nan"), float("inf"), -float("inf")])
+def test_nonfinite_rejected(storage, field, value):
+    with pytest.raises(ValueError, match="finite"):
+        PostgresMaterialEfficiencyWriter(SETTINGS).write(replace(SNAPSHOT, **{field: value}))
+    storage[1].assert_not_called()
+
+
+def run_cycles(service, writer, cycles, interval=60, stdout=None):
+    sleep = Mock(side_effect=[None] * (cycles - 1) + [KeyboardInterrupt])
+    errors = io.StringIO()
+    MaterialEfficiencyRunner(
+        service, writer, poll_interval_seconds=interval, sleep=sleep, stderr=errors, stdout=stdout
+    ).run()
+    assert sleep.call_args_list == [((interval,),)] * cycles
+    return errors.getvalue()
+
+
+def test_runner_history_and_none(storage):
+    service = Mock(
+        evaluate_current=Mock(
+            side_effect=[
+                None,
+                SNAPSHOT,
+                SNAPSHOT,
+                replace(SNAPSHOT, erp_feedback_timestamp=NOW.replace(minute=15)),
+            ]
+        )
+    )
+    output = io.StringIO()
+    run_cycles(service, PostgresMaterialEfficiencyWriter(SETTINGS), 4, 73, stdout=output)
+    lines = output.getvalue().splitlines()
+    assert len(lines) == 2
+    assert lines[0].startswith(NOW.isoformat())
+    assert lines[1].startswith(NOW.replace(minute=15).isoformat())
+    assert storage[1].call_count == 3
+    assert storage[0].execute("SELECT count(*) FROM material_efficiency_snapshots").fetchone() == (
+        2,
+    )
+
+
+@pytest.mark.parametrize("error", [ErpReadError, psycopg.OperationalError, psycopg.InterfaceError])
+def test_read_recovers(error):
+    service = Mock(evaluate_current=Mock(side_effect=[error("secret"), SNAPSHOT]))
+    writer = Mock()
+    errors = run_cycles(service, writer, 2)
+    writer.write.assert_called_once_with(SNAPSHOT)
+    assert error.__name__ in errors and "secret" not in errors
+
+
+def test_write_recovers_with_fresh_transaction(storage):
+    database, connect, connection = storage
+    connect.side_effect = [psycopg.OperationalError("secret"), connection]
+    errors = run_cycles(
+        Mock(evaluate_current=Mock(return_value=SNAPSHOT)),
+        PostgresMaterialEfficiencyWriter(SETTINGS),
+        2,
+    )
+    assert "OperationalError" in errors and "secret" not in errors
+    assert connect.call_count == 2
+    assert database.execute("SELECT count(*) FROM material_efficiency_snapshots").fetchone() == (1,)
+
+
+@pytest.mark.parametrize("error", [ValueError, TypeError, psycopg.ProgrammingError])
+def test_programming_errors_propagate(error):
+    with pytest.raises(error):
+        run_cycles(Mock(evaluate_current=Mock(side_effect=error("bad contract"))), Mock(), 1)
+
+
+@pytest.mark.parametrize("interval", [0, -1, float("nan"), float("inf"), True])
+def test_invalid_interval(interval):
+    with pytest.raises(CalculationConfigError):
+        MaterialEfficiencyRunner(Mock(), Mock(), poll_interval_seconds=interval)
+
+
+@pytest.fixture
+def runtime_files(tmp_path):
+    config = tmp_path / "config.yaml"
+    config.write_text(
+        yaml.safe_dump(
+            dict(
+                workplace="example",
+                machine_id="machine",
+                calculation_id="calc",
+                production_order_format="ORDER/{production_order}",
+                erp_timezone="Europe/Berlin",
+            )
+        )
+    )
+    postgres = tmp_path / "postgres.env"
+    postgres.write_text(
+        "POSTGRES_HOST=localhost\nPOSTGRES_PORT=5432\nPOSTGRES_DB=analytics\n"
+        "POSTGRES_USER=writer\nPOSTGRES_PASSWORD=secret\n"
+    )
+    erp = tmp_path / "erp.env"
+    erp.write_text(
+        "ERP_DB_HOST=localhost\nERP_DB_PORT=1433\nERP_DB_NAME=erp\n"
+        "ERP_DB_USER=reader\nERP_DB_PASSWORD=secret\n"
+    )
+    return config, postgres, erp
+
+
+def test_configured_runtime_naive_feedback_to_persistence(runtime_files, storage):
+    config, postgres, erp = runtime_files
+    runner = build_material_efficiency_runner(config, secrets_file=postgres, erp_secrets_file=erp)
+    assert runner.interval == 60
+    runner.service.erp = Mock(
+        get_current_workplace_status=Mock(
+            return_value=CurrentWorkplaceStatus(
+                "example",
+                "00123",
+                None,
+                None,
+                datetime(2026, 9, 4, 12),
+                None,
+                800,
+                None,
+                None,
+                None,
+            )
+        )
+    )
+    runner.service.materials = Mock(
+        latest_at_or_before=Mock(
+            return_value=MaterialConsumptionSnapshot(
+                NOW,
+                "calc",
+                "machine",
+                "ORDER/00123",
+                "run",
+                1000,
+            )
+        )
+    )
+    runner.sleep = Mock(side_effect=KeyboardInterrupt)
+    runner.run()
+    row = storage[0].execute("SELECT * FROM material_efficiency_snapshots").fetchone()
+    assert row[:7] == (
+        NOW.isoformat(),
+        NOW.isoformat(),
+        "calc",
+        "machine",
+        "example",
+        "00123",
+        "ORDER/00123",
+    )
+
+
+@pytest.mark.parametrize(
+    "changes",
+    [
+        {"erp_timezone": "invalid"},
+        {"production_order_format": "missing"},
+        {"workplace": ""},
+        {"machine_id": None},
+        {"poll_interval_seconds": 0},
+        {"unknown": 1},
+    ],
+)
+def test_startup_config_errors(runtime_files, changes, capsys):
+    config, postgres, erp = runtime_files
+    config.write_text(yaml.safe_dump(yaml.safe_load(config.read_text()) | changes))
+    assert (
+        main(
+            [
+                "run",
+                "material-efficiency",
+                "--config",
+                str(config),
+                "--secrets-file",
+                str(postgres),
+                "--erp-secrets-file",
+                str(erp),
+            ]
+        )
+        == 2
+    )
+    assert "Config/startup error" in capsys.readouterr().err
+
+
+def test_k7_config_and_cli(runtime_files, monkeypatch):
+    _, postgres, erp = runtime_files
+    runner = build_material_efficiency_runner(
+        Path("config/k7-material-efficiency.yaml"), secrets_file=postgres, erp_secrets_file=erp
+    )
+    assert runner.service.workplace == "K7"
+    assert runner.service.machine_id == "c220f95c-a65e-4cb7-99b7-0626d6c7508c"
+    assert runner.service.calculation_id == "k7-fiber-consumption"
+    assert runner.service.format_template == "K 7-{production_order}"
+    assert runner.service.erp_timezone.key == "Europe/Berlin"
+    run = Mock()
+    monkeypatch.setattr(MaterialEfficiencyRunner, "run", run)
+    assert (
+        main(
+            [
+                "run",
+                "material-efficiency",
+                "--config",
+                "config/k7-material-efficiency.yaml",
+                "--secrets-file",
+                str(postgres),
+                "--erp-secrets-file",
+                str(erp),
+            ]
+        )
+        == 0
+    )
+    run.assert_called_once()
+
+
+def test_failed_insert_rolls_back_and_later_cycle_reconnects(storage):
+    database, connect, connection = storage
+    execute = connection.__enter__.return_value.execute
+    original = execute.side_effect
+    attempts = 0
+
+    def fail_once(sql, params):
+        nonlocal attempts
+        attempts += 1
+        if attempts == 1:
+            raise psycopg.OperationalError("secret SQL")
+        return original(sql, params)
+
+    execute.side_effect = fail_once
+    errors = run_cycles(
+        Mock(evaluate_current=Mock(return_value=SNAPSHOT)),
+        PostgresMaterialEfficiencyWriter(SETTINGS),
+        2,
+    )
+    assert "secret" not in errors
+    assert connect.call_count == 2
+    assert connection.__exit__.call_args_list[0].args[0] is psycopg.OperationalError
+    assert database.execute("SELECT count(*) FROM material_efficiency_snapshots").fetchone() == (1,)
+
+
+def test_configured_interval_and_missing_settings(runtime_files, monkeypatch):
+    config, postgres, erp = runtime_files
+    config.write_text(
+        yaml.safe_dump(yaml.safe_load(config.read_text()) | {"poll_interval_seconds": 91})
+    )
+    runner = build_material_efficiency_runner(config, secrets_file=postgres, erp_secrets_file=erp)
+    assert runner.interval == 91
+    postgres.write_text("")
+    for key in ("HOST", "PORT", "DB", "USER", "PASSWORD"):
+        monkeypatch.delenv(f"POSTGRES_{key}", raising=False)
+    from production_analytics.enlyze.exploration import ConfigurationError
+
+    with pytest.raises(ConfigurationError, match="POSTGRES_HOST"):
+        build_material_efficiency_runner(config, secrets_file=postgres, erp_secrets_file=erp)
+
+
+@pytest.mark.parametrize("result", [None, False, True])
+def test_runner_success_output(result):
+    snapshot = replace(SNAPSHOT, enlyze_production_order="ORDER/00123")
+    service = Mock(evaluate_current=Mock(return_value=None if result is None else snapshot))
+    writer = Mock(write=Mock(return_value=result))
+    output = Mock(wraps=io.StringIO())
+    errors = run_cycles(service, writer, 1, stdout=output)
+    assert errors == ""
+    if result is None:
+        writer.write.assert_not_called()
+    else:
+        writer.write.assert_called_once_with(snapshot)
+    if result is True:
+        assert output.getvalue() == (
+            "2026-09-04T10:00:00+00:00 workplace='example' production_order='ORDER/00123' "
+            "good_m2=800.000 material_kg=1000.000 g_per_m2=1250.000\n"
+        )
+        output.flush.assert_called_once_with()
+    else:
+        assert output.getvalue() == ""
+        output.flush.assert_not_called()
+
+
+def test_repeated_duplicates_are_silent(storage):
+    writer = PostgresMaterialEfficiencyWriter(SETTINGS)
+    assert writer.write(SNAPSHOT) is True
+    output = io.StringIO()
+    run_cycles(Mock(evaluate_current=Mock(return_value=SNAPSHOT)), writer, 3, stdout=output)
+    assert output.getvalue() == ""
+
+
+def test_commit_failure_does_not_log_success(storage):
+    _, _, connection = storage
+    connection.__exit__.side_effect = [psycopg.OperationalError("secret driver SQL"), None]
+    output = io.StringIO()
+    errors = run_cycles(
+        Mock(evaluate_current=Mock(return_value=SNAPSHOT)),
+        PostgresMaterialEfficiencyWriter(SETTINGS),
+        1,
+        stdout=output,
+    )
+    assert output.getvalue() == ""
+    assert errors == "Material efficiency cycle failed: OperationalError\n"
+
+
+def test_bento_uses_generic_efficiency_and_distinct_output_id(runtime_files, storage):
+    _, postgres, erp = runtime_files
+    runner = build_material_efficiency_runner(
+        Path('config/bento1-material-efficiency.yaml'),
+        secrets_file=postgres, erp_secrets_file=erp,
+    )
+    from production_analytics.service.material_efficiency import MaterialEfficiencyService
+
+    assert type(runner.service) is MaterialEfficiencyService
+    service = runner.service
+    status = CurrentWorkplaceStatus(
+        'Bento 1', '00123', None, None, NOW, None, 800, None, None, None,
+    )
+    service.erp = Mock(get_current_workplace_status=Mock(return_value=status))
+    service.materials = Mock(latest_at_or_before=Mock(return_value=MaterialConsumptionSnapshot(
+        NOW, 'bento1-fresh-bentonite-consumption', service.machine_id, 'Bento 1-00123', 'run', 2400,
+    )))
+    snapshot = service.evaluate_current()
+    assert snapshot.calculation_id == 'bento1-fresh-bentonite-efficiency'
+    assert snapshot.material_consumption_g_per_m2 == 3000
+    assert snapshot.nominal_width_m is None
+    service.materials.latest_at_or_before.assert_called_once_with(
+        calculation_id='bento1-fresh-bentonite-consumption', machine_id=service.machine_id,
+        production_order='Bento 1-00123', timestamp=NOW,
+    )
+    runner.writer.write(snapshot)
+    row = storage[0].execute(
+        'SELECT calculation_id, material_consumption_g_per_m2 FROM material_efficiency_snapshots'
+    ).fetchone()
+    assert row == ('bento1-fresh-bentonite-efficiency', 3000)
+
+
+@pytest.mark.parametrize('value', ['', None, 12, 'bad\x00id'])
+def test_invalid_output_calculation_id(runtime_files, value):
+    config, postgres, erp = runtime_files
+    document = yaml.safe_load(config.read_text()) | {'output_calculation_id': value}
+    config.write_text(yaml.safe_dump(document))
+    with pytest.raises(CalculationConfigError, match='output_calculation_id'):
+        build_material_efficiency_runner(config, secrets_file=postgres, erp_secrets_file=erp)

tests/test_material_polling_service.py

@@ -0,0 +1,409 @@
+from datetime import UTC, datetime
+from unittest.mock import Mock
+
+import pytest
+
+from production_analytics.calculations.material_consumption import (
+    MaterialIntegrationState,
+    MaterialSample,
+)
+from production_analytics.enlyze.gateway import EnlyzeProductionRun
+from production_analytics.service.material_polling import (
+    MaterialPollingService,
+    MaterialPollingState,
+)
+
+
+def test_poll_once_starts_at_run_start_without_saved_state() -> None:
+    gateway = Mock()
+    gateway.get_production_runs.return_value = []
+    state_store = Mock()
+    state_store.load.return_value = None
+
+    run = EnlyzeProductionRun(
+        uuid="run-1",
+        machine_id="machine-1",
+        product_id="product-1",
+        production_order="ORDER-1",
+        start=datetime(2026, 9, 3, 5, 7, 47, tzinfo=UTC),
+        end=None,
+    )
+    gateway.get_open_production_run.return_value = run
+    gateway.get_production_runs.return_value = [run]
+
+    samples = [
+        MaterialSample(
+            timestamp=datetime(2026, 9, 3, 5, 7, 50, tzinfo=UTC),
+            material_rate_kg_per_hour=3600.0,
+            gate_value=1.0,
+        ),
+        MaterialSample(
+            timestamp=datetime(2026, 9, 3, 5, 8, 0, tzinfo=UTC),
+            material_rate_kg_per_hour=3600.0,
+            gate_value=1.0,
+        ),
+    ]
+    gateway.get_material_samples.return_value = samples
+
+    service = MaterialPollingService(
+        gateway=gateway,
+        state_store=state_store,
+        machine_id="machine-1",
+        rate_variable_id="rate-variable",
+        gate_variable_id="gate-variable",
+        gate_threshold=0.5,
+        max_sample_gap_seconds=20.0,
+    )
+
+    result = service.poll_once(
+        now=datetime(2026, 9, 3, 5, 8, 10, tzinfo=UTC),
+    )
+
+    assert result is not None
+    assert result.run == run
+    assert result.state.cumulative_consumption_kg == 10.0
+    assert result.state.integrated_running_seconds == 10.0
+
+    gateway.get_material_samples.assert_called_once_with(
+        machine_id="machine-1",
+        rate_variable_id="rate-variable",
+        gate_variable_id="gate-variable",
+        start=run.start,
+        end=datetime(2026, 9, 3, 5, 8, 10, tzinfo=UTC),
+    )
+
+    state_store.save.assert_called_once_with(
+        "machine-1",
+        run.production_order,
+        MaterialPollingState(
+            run_id=run.uuid,
+            integration_state=result.state,
+        ),
+    )
+
+
+def test_poll_once_resumes_from_saved_timestamp_without_double_counting() -> None:
+    gateway = Mock()
+    gateway.get_production_runs.return_value = []
+    state_store = Mock()
+
+    run = EnlyzeProductionRun(
+        uuid="run-1",
+        machine_id="machine-1",
+        product_id="product-1",
+        production_order="ORDER-1",
+        start=datetime(2026, 9, 3, 5, 7, 47, tzinfo=UTC),
+        end=None,
+    )
+    gateway.get_open_production_run.return_value = run
+
+    saved_state = MaterialIntegrationState(
+        cumulative_consumption_kg=10.0,
+        integrated_running_seconds=10.0,
+        last_processed_timestamp=datetime(2026, 9, 3, 5, 8, 0, tzinfo=UTC),
+        last_material_rate_kg_per_hour=3600.0,
+        last_gate_value=1.0,
+        integration_active=True,
+    )
+    state_store.load.return_value = MaterialPollingState(
+        run_id=run.uuid,
+        integration_state=saved_state,
+    )
+
+    gateway.get_material_samples.return_value = [
+        MaterialSample(
+            timestamp=datetime(2026, 9, 3, 5, 8, 0, tzinfo=UTC),
+            material_rate_kg_per_hour=3600.0,
+            gate_value=1.0,
+        ),
+        MaterialSample(
+            timestamp=datetime(2026, 9, 3, 5, 8, 10, tzinfo=UTC),
+            material_rate_kg_per_hour=3600.0,
+            gate_value=1.0,
+        ),
+    ]
+
+    service = MaterialPollingService(
+        gateway=gateway,
+        state_store=state_store,
+        machine_id="machine-1",
+        rate_variable_id="rate-variable",
+        gate_variable_id="gate-variable",
+        gate_threshold=0.5,
+        max_sample_gap_seconds=20.0,
+    )
+
+    result = service.poll_once(
+        now=datetime(2026, 9, 3, 5, 8, 20, tzinfo=UTC),
+    )
+
+    assert result is not None
+    gateway.get_production_runs.assert_not_called()
+    assert result.state.cumulative_consumption_kg == 20.0
+    assert result.state.integrated_running_seconds == 20.0
+
+    gateway.get_material_samples.assert_called_once_with(
+        machine_id="machine-1",
+        rate_variable_id="rate-variable",
+        gate_variable_id="gate-variable",
+        start=saved_state.last_processed_timestamp,
+        end=datetime(2026, 9, 3, 5, 8, 20, tzinfo=UTC),
+    )
+
+
+def test_poll_once_without_open_run_does_nothing() -> None:
+    gateway = Mock()
+    gateway.get_production_runs.return_value = []
+    state_store = Mock()
+    gateway.get_open_production_run.return_value = None
+
+    service = MaterialPollingService(
+        gateway=gateway,
+        state_store=state_store,
+        machine_id="machine-1",
+        rate_variable_id="rate-variable",
+        gate_variable_id="gate-variable",
+        gate_threshold=0.5,
+        max_sample_gap_seconds=20.0,
+    )
+
+    result = service.poll_once(
+        now=datetime(2026, 9, 3, 5, 8, 20, tzinfo=UTC),
+    )
+
+    assert result is None
+    gateway.get_material_samples.assert_not_called()
+    state_store.load.assert_not_called()
+    state_store.save.assert_not_called()
+
+
+def test_new_run_of_same_order_keeps_total_but_restarts_integration_at_run_start() -> None:
+    gateway = Mock()
+    gateway.get_production_runs.return_value = []
+    state_store = Mock()
+
+    run = EnlyzeProductionRun(
+        uuid="run-2",
+        machine_id="machine-1",
+        product_id="product-1",
+        production_order="ORDER-1",
+        start=datetime(2026, 9, 3, 8, 0, 0, tzinfo=UTC),
+        end=None,
+    )
+    gateway.get_open_production_run.return_value = run
+
+    previous_integration_state = MaterialIntegrationState(
+        cumulative_consumption_kg=100.0,
+        integrated_running_seconds=360.0,
+        last_processed_timestamp=datetime(2026, 9, 3, 6, 0, 0, tzinfo=UTC),
+        last_material_rate_kg_per_hour=3600.0,
+        last_gate_value=1.0,
+        integration_active=True,
+    )
+
+    state_store.load.return_value = MaterialPollingState(
+        run_id="run-1",
+        integration_state=previous_integration_state,
+    )
+
+    gateway.get_material_samples.return_value = [
+        MaterialSample(
+            timestamp=datetime(2026, 9, 3, 8, 0, 10, tzinfo=UTC),
+            material_rate_kg_per_hour=3600.0,
+            gate_value=1.0,
+        ),
+        MaterialSample(
+            timestamp=datetime(2026, 9, 3, 8, 0, 20, tzinfo=UTC),
+            material_rate_kg_per_hour=3600.0,
+            gate_value=1.0,
+        ),
+    ]
+
+    service = MaterialPollingService(
+        gateway=gateway,
+        state_store=state_store,
+        machine_id="machine-1",
+        rate_variable_id="rate-variable",
+        gate_variable_id="gate-variable",
+        gate_threshold=0.5,
+        max_sample_gap_seconds=20.0,
+    )
+
+    result = service.poll_once(
+        now=datetime(2026, 9, 3, 8, 0, 30, tzinfo=UTC),
+    )
+
+    assert result is not None
+    gateway.get_production_runs.assert_not_called()
+    assert result.state.cumulative_consumption_kg == 110.0
+    assert result.state.integrated_running_seconds == 370.0
+
+    state_store.load.assert_called_once_with(
+        "machine-1",
+        "ORDER-1",
+    )
+
+    gateway.get_material_samples.assert_called_once_with(
+        machine_id="machine-1",
+        rate_variable_id="rate-variable",
+        gate_variable_id="gate-variable",
+        start=run.start,
+        end=datetime(2026, 9, 3, 8, 0, 30, tzinfo=UTC),
+    )
+
+
+@pytest.fixture
+def polling(tmp_path):
+    from production_analytics.service.material_state_store import JsonMaterialStateStore
+
+    gateway = Mock()
+    gateway.get_production_runs.return_value = []
+    gateway.get_open_production_run.return_value = EnlyzeProductionRun(
+        "run", "machine", None, "order", datetime(2026, 9, 3, tzinfo=UTC), None,
+    )
+    gateway.get_material_samples.return_value = []
+    store = JsonMaterialStateStore(tmp_path)
+    service = MaterialPollingService(
+        gateway=gateway, state_store=store, machine_id="machine",
+        rate_variable_id="rate", gate_variable_id="gate", gate_threshold=0.5,
+        max_sample_gap_seconds=20,
+    )
+    return service, gateway, store
+
+
+def test_empty_response_persists_state_without_inferred_consumption(polling) -> None:
+    service, gateway, store = polling
+    now = datetime(2026, 9, 3, 1, tzinfo=UTC)
+    assert service.poll_once(now=now).state == MaterialIntegrationState()
+    saved = MaterialPollingState("run", MaterialIntegrationState(
+        cumulative_consumption_kg=10, integrated_running_seconds=10,
+        last_processed_timestamp=now, last_material_rate_kg_per_hour=3600,
+        last_gate_value=1, integration_active=True,
+    ))
+    store.save("machine", "order", saved)
+    assert service.poll_once(now=now).state == saved.integration_state
+    assert store.load("machine", "order") == saved
+
+
+def test_different_order_does_not_reuse_state(polling) -> None:
+    service, gateway, store = polling
+    store.save("machine", "other-order", MaterialPollingState(
+        "old", MaterialIntegrationState(cumulative_consumption_kg=100),
+    ))
+    result = service.poll_once(now=datetime(2026, 9, 3, 1, tzinfo=UTC))
+    assert result.state == MaterialIntegrationState()
+    assert gateway.get_material_samples.call_args.kwargs["start"] == result.run.start
+    assert store.load("machine", "other-order").integration_state.cumulative_consumption_kg == 100
+
+
+def test_now_before_run_start_does_not_query_or_save(polling) -> None:
+    service, gateway, store = polling
+    assert service.poll_once(now=datetime(2026, 9, 2, tzinfo=UTC)) is None
+    gateway.get_production_runs.assert_not_called()
+    gateway.get_material_samples.assert_not_called()
+    assert store.load("machine", "order") is None
+
+
+def test_naive_now_is_rejected_before_io(polling) -> None:
+    service, gateway, store = polling
+    with pytest.raises(ValueError, match="now must be timezone-aware"):
+        service.poll_once(now=datetime(2026, 9, 3))
+    gateway.get_open_production_run.assert_not_called()
+
+
+def test_new_run_empty_response_resets_baseline_and_retains_totals(polling) -> None:
+    service, gateway, store = polling
+    store.save("machine", "order", MaterialPollingState("previous", MaterialIntegrationState(
+        cumulative_consumption_kg=100, integrated_running_seconds=50,
+        last_processed_timestamp=datetime(2026, 9, 2, 23, 59, 59, tzinfo=UTC),
+        last_material_rate_kg_per_hour=3600, last_gate_value=1, integration_active=True,
+    )))
+    result = service.poll_once(now=datetime(2026, 9, 3, 1, tzinfo=UTC))
+    assert result.state == MaterialIntegrationState(
+        cumulative_consumption_kg=100, integrated_running_seconds=50,
+    )
+    assert store.load("machine", "order") == MaterialPollingState("run", result.state)
+
+
+def test_now_before_saved_timestamp_leaves_state_unchanged(polling) -> None:
+    service, gateway, store = polling
+    saved = MaterialPollingState("run", MaterialIntegrationState(
+        last_processed_timestamp=datetime(2026, 9, 3, 2, tzinfo=UTC),
+    ))
+    store.save("machine", "order", saved)
+    assert service.poll_once(now=datetime(2026, 9, 3, 1, tzinfo=UTC)) is None
+    gateway.get_material_samples.assert_not_called()
+    assert store.load("machine", "order") == saved
+
+
+@pytest.mark.parametrize("order", [
+    "K 7-12026000815", "K 7-12025000074-K 7-12025000075",
+])
+@pytest.mark.parametrize("gap_seconds", [5, 86400])
+def test_bootstrap_replays_exact_order_segments_and_then_resumes(
+    polling, order, gap_seconds,
+) -> None:
+    from dataclasses import replace
+    from datetime import timedelta
+
+    service, gateway, store = polling
+    base = datetime(2026, 9, 3, tzinfo=UTC)
+    runs = [
+        EnlyzeProductionRun(
+            f"run-{i}", "machine", None, order,
+            base + timedelta(seconds=i * (10 + gap_seconds)),
+            base + timedelta(seconds=i * (10 + gap_seconds) + 10) if i < 4 else None,
+        )
+        for i in range(5)
+    ]
+    current = runs[-1]
+    now = current.start + timedelta(seconds=10)
+    gateway.get_open_production_run.return_value = current
+    gateway.get_production_runs.return_value = [
+        current, runs[2], runs[0], runs[3], runs[1],
+        replace(runs[0], uuid="unrelated", production_order=order + "-suffix"),
+        replace(runs[0], uuid="component", production_order="K 7-12025000074"),
+        replace(runs[0], uuid="whitespace", production_order=order + " "),
+        replace(current, uuid="future", start=now + timedelta(days=1)),
+    ]
+
+    def samples(**kwargs):
+        return [
+            MaterialSample(kwargs["start"], 3600, 1),
+            MaterialSample(kwargs["end"], 3600, 1),
+        ]
+
+    gateway.get_material_samples.side_effect = samples
+    result = service.poll_once(now=now)
+    assert result.state.cumulative_consumption_kg == 50
+    assert result.state.integrated_running_seconds == 50
+    assert [
+        (call.kwargs["start"], call.kwargs["end"])
+        for call in gateway.get_material_samples.call_args_list
+    ] == [(run.start, run.end or now) for run in runs]
+    assert store.load("machine", order) == MaterialPollingState(current.uuid, result.state)
+
+    gateway.get_production_runs.reset_mock()
+    gateway.get_material_samples.reset_mock()
+    result = service.poll_once(now=now + timedelta(seconds=10))
+    gateway.get_production_runs.assert_not_called()
+    assert gateway.get_material_samples.call_args.kwargs["start"] == now
+    assert result.state.cumulative_consumption_kg == 60
+    assert result.state.integrated_running_seconds == 60
+
+
+def test_bootstrap_failure_does_not_persist_partial_totals(polling) -> None:
+    from dataclasses import replace
+    from datetime import timedelta
+
+    service, gateway, store = polling
+    current = gateway.get_open_production_run.return_value
+    gateway.get_production_runs.return_value = [
+        replace(current, uuid="old", start=current.start - timedelta(hours=1),
+                end=current.start - timedelta(minutes=30)),
+        current,
+    ]
+    gateway.get_material_samples.side_effect = [[], ValueError("failed page")]
+    with pytest.raises(ValueError, match="failed page"):
+        service.poll_once(now=current.start + timedelta(seconds=10))
+    assert store.load("machine", "order") is None

tests/test_material_runner.py

@@ -0,0 +1,291 @@
+import io
+from datetime import UTC, datetime, timedelta
+from pathlib import Path
+from unittest.mock import Mock, patch
+
+import pytest
+import yaml
+
+from production_analytics.calculations.config import (
+    CalculationConfigError,
+    load_material_calculation,
+)
+from production_analytics.calculations.material_consumption import MaterialIntegrationState
+from production_analytics.cli.__main__ import main
+from production_analytics.enlyze.exploration import ConfigurationError
+from production_analytics.enlyze.gateway import EnlyzeProductionRun
+from production_analytics.service.material_polling import MaterialPollResult
+from production_analytics.service.material_runner import MaterialPollingRunner, MaterialStateError
+from production_analytics.service.material_runtime import (
+    _ReportingStateStore,
+    build_material_runner,
+)
+
+EXAMPLE = Path(__file__).resolve().parents[1] / 'config/k7-material-consumption.yaml'
+NOW = datetime(2026, 1, 1, tzinfo=UTC)
+
+
+def write_config(tmp_path, entries):
+    path = tmp_path / 'calculations.yaml'
+    path.write_text(yaml.safe_dump({'calculations': entries}))
+    return path
+
+
+def entry():
+    return yaml.safe_load(EXAMPLE.read_text())['calculations'][0]
+
+
+def test_valid_k7_config():
+    config = load_material_calculation(EXAMPLE)
+    assert config.id == 'k7-fiber-consumption'
+    assert config.machine_ref == 'c220f95c-a65e-4cb7-99b7-0626d6c7508c'
+    assert config.rate_signal_ref == 'c9d06af5-f6d6-4ede-b6c4-5a98bac77129'
+    assert config.gate_signal_ref == '823867bb-f5d2-40eb-b875-657155addfd0'
+    assert config.gate_threshold == 0.5
+    assert config.max_sample_gap_seconds == 20.0
+
+
+@pytest.mark.parametrize('field', list(entry()))
+def test_missing_fields(tmp_path, field):
+    data = entry()
+    del data[field]
+    with pytest.raises(CalculationConfigError, match=f'missing fields: {field}'):
+        load_material_calculation(write_config(tmp_path, [data]))
+
+
+@pytest.mark.parametrize(('field', 'value'), [
+    ('type', 'integration'), ('version', 1), ('version', '2'),
+    ('machine_ref', ''), ('rate_signal_ref', '  '), ('gate_signal_ref', None), ('id', ''),
+    ('gate_threshold', True), ('gate_threshold', '0.5'), ('gate_threshold', float('nan')),
+    ('max_sample_gap_seconds', float('inf')), ('max_sample_gap_seconds', 0),
+    ('max_sample_gap_seconds', -1), ('output_unit', 'tonnes'), ('group_by', 'run'),
+    ('gate_treshold', 1),
+])
+def test_invalid_fields(tmp_path, field, value):
+    data = entry()
+    data[field] = value
+    with pytest.raises(CalculationConfigError):
+        load_material_calculation(write_config(tmp_path, [data]))
+
+
+@pytest.mark.parametrize('content', [
+    'calculations: [', 'calculations: []', 'calculations: {}', 'other: []',
+    'calculations: []\ncalculations: []', 'calculations:\n - id: x\n   id: y',
+])
+def test_malformed_documents(tmp_path, content):
+    path = tmp_path / 'bad.yaml'
+    path.write_text(content)
+    with pytest.raises(CalculationConfigError):
+        load_material_calculation(path)
+
+
+def test_selection(tmp_path):
+    first, second = entry(), dict(entry(), id='second')
+    path = write_config(tmp_path, [first, second])
+    with pytest.raises(CalculationConfigError, match='specify --calculation-id'):
+        load_material_calculation(path)
+    assert load_material_calculation(path, 'second').id == 'second'
+    with pytest.raises(CalculationConfigError, match='not found'):
+        load_material_calculation(path, 'absent')
+    with pytest.raises(CalculationConfigError, match='unique'):
+        load_material_calculation(write_config(tmp_path, [first, first]), first['id'])
+
+
+def test_repeated_sequential_polls_and_long_cycle():
+    events = []
+    elapsed = 0
+
+    def poll(*, now):
+        nonlocal elapsed
+        assert now == NOW + timedelta(seconds=elapsed)
+        events.append('poll-start')
+        elapsed += 25  # Longer than the interval; no real sleep or concurrent work.
+        events.append('poll-end')
+
+    def sleep(seconds):
+        nonlocal elapsed
+        events.append(('sleep', seconds))
+        elapsed += seconds
+        if elapsed >= 70:
+            raise KeyboardInterrupt
+
+    output = io.StringIO()
+    service = Mock(poll_once=Mock(side_effect=poll))
+    MaterialPollingRunner(
+        service, calculation_id='test-calculation', snapshot_writer=Mock(),
+        machine_id='machine', poll_interval_seconds=10,
+        clock=lambda: NOW + timedelta(seconds=elapsed), sleep=sleep, stdout=output,
+    ).run()
+    assert events == ['poll-start', 'poll-end', ('sleep', 10)] * 2
+    assert service.poll_once.call_count == 2
+    assert output.getvalue().count('no open Production Run') == 2
+    assert 'stopped' in output.getvalue()
+
+
+def test_error_then_success_preserves_opaque_order_and_reports_totals():
+    run = EnlyzeProductionRun('run', 'machine', None, ' 00842/ABC ', NOW, None)
+    result = MaterialPollResult(run, MaterialIntegrationState(12.5, 20))
+    service = Mock(poll_once=Mock(side_effect=[ValueError('SECRET'), result]))
+    output, errors = io.StringIO(), io.StringIO()
+    sleep = Mock(side_effect=[None, KeyboardInterrupt])
+    MaterialPollingRunner(
+        service, calculation_id='test-calculation', snapshot_writer=Mock(),
+        machine_id='machine', poll_interval_seconds=5, clock=lambda: NOW,
+        sleep=sleep, stdout=output, stderr=errors,
+    ).run()
+    assert service.poll_once.call_count == 2
+    assert sleep.call_count == 2
+    assert 'gateway/poll cycle: ValueError' in errors.getvalue()
+    assert 'SECRET' not in errors.getvalue()
+    assert "production_order=' 00842/ABC '" in output.getvalue()
+    assert 'consumption_kg=12.500000000 running_seconds=20.000' in output.getvalue()
+    assert NOW.isoformat() in output.getvalue()
+
+
+def test_interrupt_during_poll():
+    sleep, output = Mock(), io.StringIO()
+    MaterialPollingRunner(
+        Mock(poll_once=Mock(side_effect=KeyboardInterrupt)),
+        calculation_id='test-calculation', snapshot_writer=Mock(), machine_id='m',
+        poll_interval_seconds=1, sleep=sleep, stdout=output,
+    ).run()
+    sleep.assert_not_called()
+    assert 'stopped' in output.getvalue()
+
+
+def test_cycle_configuration_failure_is_fatal():
+    sleep = Mock()
+    runner = MaterialPollingRunner(
+        Mock(poll_once=Mock(side_effect=ConfigurationError('bad settings'))),
+        calculation_id='test-calculation', snapshot_writer=Mock(),
+        machine_id='m', poll_interval_seconds=1, sleep=sleep,
+    )
+    with pytest.raises(ConfigurationError):
+        runner.run()
+    sleep.assert_not_called()
+
+
+@pytest.mark.parametrize('interval', [0, -1, float('nan'), float('inf'), True])
+def test_invalid_interval(interval):
+    with pytest.raises(CalculationConfigError):
+        MaterialPollingRunner(
+            Mock(), machine_id='m', calculation_id='test', snapshot_writer=Mock(),
+            poll_interval_seconds=interval,
+        )
+
+
+@pytest.mark.parametrize('operation', ['load', 'save'])
+def test_state_error_classification(operation):
+    store = Mock()
+    getattr(store, operation).side_effect = OSError('SECRET')
+    wrapped = _ReportingStateStore(store)
+    arguments = ('machine', ' 00842 ') if operation == 'load' else ('machine', ' 00842 ', Mock())
+    phase = 'loading' if operation == 'load' else 'saving'
+    with pytest.raises(MaterialStateError, match=f'state {phase}: OSError') as error:
+        getattr(wrapped, operation)(*arguments)
+    assert 'SECRET' not in str(error.value)
+
+
+def test_runtime_wiring(tmp_path, monkeypatch):
+    monkeypatch.setenv('ENLYZE_BASE_URL', 'https://example.invalid/api/')
+    secrets = tmp_path / 'secret.env'
+    for key, value in dict(HOST='localhost', PORT='5432', DB='analytics',
+                           USER='user', PASSWORD='environment-password').items():
+        monkeypatch.setenv(f'POSTGRES_{key}', value)
+    secrets.write_text('ENLYZE_API_KEY=secret-from-file\nPOSTGRES_PASSWORD=file-password\n')
+    with patch('production_analytics.service.material_runtime.MaterialPollingService') as service:
+        runner = build_material_runner(
+            load_material_calculation(EXAMPLE), poll_interval_seconds=7,
+            state_directory=tmp_path / 'state', secrets_file=secrets,
+        )
+    kwargs = service.call_args.kwargs
+    assert kwargs['machine_id'] == entry()['machine_ref']
+    assert kwargs['rate_variable_id'] == entry()['rate_signal_ref']
+    assert kwargs['gate_variable_id'] == entry()['gate_signal_ref']
+    assert kwargs['gate_threshold'] == 0.5
+    assert kwargs['max_sample_gap_seconds'] == 20.0
+    assert kwargs['gateway']._client._settings.api_key == 'secret-from-file'
+    assert kwargs['state_store'].store._directory == tmp_path / 'state'
+    assert runner.service is service.return_value
+    assert runner.interval == 7
+    assert runner.calculation_id == 'k7-fiber-consumption'
+    assert runner.snapshot_writer.settings.password == 'file-password'
+    assert runner.snapshot_writer.settings.dbname == 'analytics'
+
+
+def test_cli_bad_config(tmp_path, capsys):
+    assert main(['run', 'material-poll', '--config', str(tmp_path / 'missing')]) == 2
+    assert 'Config/startup' in capsys.readouterr().err
+
+
+def test_cli_startup_and_success(tmp_path, capsys):
+    args = ['run', 'material-poll', '--config', str(EXAMPLE),
+            '--calculation-id', 'k7-fiber-consumption']
+    with patch('production_analytics.service.material_runtime.build_material_runner') as build:
+        assert main(args) == 0
+        build.return_value.run.assert_called_once_with()
+        assert build.call_args.kwargs['state_directory'] == Path('data/state/material')
+        build.side_effect = ConfigurationError('bad settings')
+        assert main(args) == 2
+    assert 'bad settings' in capsys.readouterr().err
+
+
+def test_failed_cycle_keeps_checkpoint_and_recovers(tmp_path):
+    from production_analytics.calculations.material_consumption import MaterialSample
+    from production_analytics.service.material_polling import (
+        MaterialPollingService,
+        MaterialPollingState,
+    )
+    from production_analytics.service.material_state_store import JsonMaterialStateStore
+
+    order = ' 00842 '
+    store = JsonMaterialStateStore(tmp_path)
+    store.save('machine', order, MaterialPollingState('run', MaterialIntegrationState(
+        cumulative_consumption_kg=1, integrated_running_seconds=10,
+        last_processed_timestamp=NOW, last_material_rate_kg_per_hour=3600,
+        last_gate_value=1, integration_active=True,
+    )))
+    checkpoint = next(tmp_path.glob('*.json'))
+    original = checkpoint.read_bytes()
+    gateway = Mock()
+    gateway.get_open_production_run.return_value = EnlyzeProductionRun(
+        'run', 'machine', None, order, NOW, None,
+    )
+    gateway.get_material_samples.side_effect = [
+        ValueError('bad response'), [MaterialSample(NOW + timedelta(seconds=10), 3600, 1)],
+    ]
+    service = MaterialPollingService(
+        gateway=gateway, state_store=_ReportingStateStore(store), machine_id='machine',
+        rate_variable_id='rate', gate_variable_id='gate', gate_threshold=.5,
+        max_sample_gap_seconds=20,
+    )
+    sleeps = 0
+
+    def sleep(seconds):
+        nonlocal sleeps
+        sleeps += 1
+        if sleeps == 1:
+            assert checkpoint.read_bytes() == original
+        else:
+            raise KeyboardInterrupt
+
+    MaterialPollingRunner(
+        service, calculation_id='test-calculation', snapshot_writer=Mock(),
+        machine_id='machine', poll_interval_seconds=1,
+        clock=lambda: NOW + timedelta(seconds=10), sleep=sleep,
+        stdout=io.StringIO(), stderr=io.StringIO(),
+    ).run()
+    restored = store.load('machine', order)
+    assert restored.integration_state.cumulative_consumption_kg == 11
+    assert restored.integration_state.integrated_running_seconds == 20
+
+
+def test_unwritable_state_location_is_startup_failure(tmp_path, monkeypatch, capsys):
+    monkeypatch.setenv('ENLYZE_BASE_URL', 'https://example.invalid/api/')
+    blocked = tmp_path / 'file'
+    blocked.write_text('not a directory')
+    assert main([
+        'run', 'material-poll', '--config', str(EXAMPLE),
+        '--state-directory', str(blocked), '--secrets-file', str(tmp_path / 'absent'),
+    ]) == 2
+    assert 'State directory startup check failed' in capsys.readouterr().err

tests/test_material_snapshot_repository.py

@@ -0,0 +1,101 @@
+import sqlite3
+import sys
+from datetime import UTC, datetime
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from production_analytics.service.postgres_material import (
+    PostgresMaterialSnapshotRepository,
+    PostgresSettings,
+)
+
+START = datetime(2026, 9, 4, 10, tzinfo=UTC)
+ORDER = " K 7-123'; -- "
+SETTINGS = PostgresSettings('localhost', 5432, 'analytics', 'reader', 'secret')
+
+
+@pytest.fixture
+def database():
+    # Execute the actual portable SELECT in SQLite; only adapt driver placeholders
+    # and datetime transport. This tests SQL semantics without a live PostgreSQL server.
+    with sqlite3.connect(':memory:') as database:
+        database.execute('''CREATE TABLE material_consumption_snapshots (
+            timestamp TEXT, calculation_id TEXT, machine_id TEXT, production_order TEXT,
+            run_id TEXT, consumption_kg REAL
+        )''')
+        rows = [
+            (START.isoformat(), 'calc', 'machine', ORDER, 'run1', 1000),
+            (START.replace(minute=10).isoformat(), 'calc', 'machine', ORDER, 'run2', 1100),
+            (START.replace(minute=4).isoformat(), 'other', 'machine', ORDER, 'run', 9999),
+            (START.replace(minute=4).isoformat(), 'calc', 'other', ORDER, 'run', 9999),
+            (START.replace(minute=4).isoformat(), 'calc', 'machine', ORDER.strip(), 'run', 9999),
+            (START.replace(minute=4).isoformat(), 'calc', 'machine', ORDER + '-other', 'run', 9999),
+        ]
+        database.executemany(
+            'INSERT INTO material_consumption_snapshots VALUES (?,?,?,?,?,?)', rows,
+        )
+        yield database
+
+
+@pytest.mark.parametrize('minute, expected_minute, consumption', [
+    (-1, None, None), (0, 0, 1000), (5, 0, 1000), (10, 10, 1100), (15, 10, 1100),
+])
+def test_aligned_lookup_sql(database, minute, expected_minute, consumption):
+    cutoff = START.replace(minute=minute) if minute >= 0 else START.replace(hour=9, minute=59)
+    driver = MagicMock()
+    connection = driver.connect.return_value.__enter__.return_value
+
+    def execute(sql, parameters):
+        assert parameters == ('calc', 'machine', ORDER, cutoff)
+        assert sql.count('%s') == 4
+        assert ORDER not in sql
+        assert 'ORDER BY timestamp DESC' in sql
+        assert 'LIMIT 1' in sql
+        row = database.execute(
+            sql.replace('%s', '?'), (*parameters[:3], parameters[3].isoformat()),
+        ).fetchone()
+        if row is not None:
+            row = (datetime.fromisoformat(row[0]), *row[1:])
+        return MagicMock(fetchone=MagicMock(return_value=row))
+
+    connection.execute.side_effect = execute
+    with patch.dict(sys.modules, psycopg=driver):
+        result = PostgresMaterialSnapshotRepository(SETTINGS).latest_at_or_before(
+            calculation_id='calc', machine_id='machine', production_order=ORDER, timestamp=cutoff,
+        )
+    if expected_minute is None:
+        assert result is None
+    else:
+        assert result.timestamp == START.replace(minute=expected_minute)
+        assert result.timestamp <= cutoff
+        assert result.consumption_kg == consumption
+        assert (result.calculation_id, result.machine_id, result.production_order) == (
+            'calc', 'machine', ORDER,
+        )
+        assert result.run_id == ('run1' if expected_minute == 0 else 'run2')
+    connection.execute.assert_called_once()
+    driver.connect.assert_called_once_with(
+        host='localhost', port=5432, dbname='analytics', user='reader', password='secret',
+        connect_timeout=10, options='-c statement_timeout=10000',
+    )
+    driver.connect.return_value.__exit__.assert_called_once_with(None, None, None)
+
+
+def test_naive_cutoff_rejected_before_connection():
+    driver = MagicMock()
+    with patch.dict(sys.modules, psycopg=driver), pytest.raises(ValueError, match='timezone-aware'):
+        PostgresMaterialSnapshotRepository(SETTINGS).latest_at_or_before(
+            calculation_id='calc', machine_id='machine', production_order=ORDER,
+            timestamp=START.replace(tzinfo=None),
+        )
+    driver.connect.assert_not_called()
+
+
+def test_database_failure_propagates():
+    driver = MagicMock()
+    driver.connect.side_effect = RuntimeError('connection unavailable')
+    with patch.dict(sys.modules, psycopg=driver), pytest.raises(RuntimeError):
+        PostgresMaterialSnapshotRepository(SETTINGS).latest_at_or_before(
+            calculation_id='calc', machine_id='machine', production_order=ORDER, timestamp=START,
+        )

tests/test_material_state_store.py

@@ -0,0 +1,141 @@
+from datetime import UTC, datetime
+
+import pytest
+
+from production_analytics.calculations.material_consumption import (
+    MaterialIntegrationState,
+)
+from production_analytics.service.material_polling import MaterialPollingState
+from production_analytics.service.material_state_store import JsonMaterialStateStore
+
+
+def test_json_state_store_returns_none_for_missing_state(tmp_path) -> None:
+    store = JsonMaterialStateStore(tmp_path)
+
+    assert store.load("machine-1", "ORDER-1") is None
+
+
+def test_json_state_store_roundtrip(tmp_path) -> None:
+    store = JsonMaterialStateStore(tmp_path)
+
+    original = MaterialPollingState(
+        run_id="run-1",
+        integration_state=MaterialIntegrationState(
+            cumulative_consumption_kg=123.4,
+            integrated_running_seconds=456.0,
+            last_processed_timestamp=datetime(
+                2026, 9, 3, 5, 10, 50, tzinfo=UTC
+            ),
+            last_material_rate_kg_per_hour=1028.5,
+            last_gate_value=2.1,
+            integration_active=True,
+        ),
+    )
+
+    store.save("machine-1", "ORDER-1", original)
+    restored = store.load("machine-1", "ORDER-1")
+
+    assert restored == original
+
+
+def test_json_state_store_separates_orders(tmp_path) -> None:
+    store = JsonMaterialStateStore(tmp_path)
+
+    state_a = MaterialPollingState(
+        run_id="run-a",
+        integration_state=MaterialIntegrationState(
+            cumulative_consumption_kg=10.0,
+        ),
+    )
+    state_b = MaterialPollingState(
+        run_id="run-b",
+        integration_state=MaterialIntegrationState(
+            cumulative_consumption_kg=20.0,
+        ),
+    )
+
+    store.save("machine-1", "ORDER-1", state_a)
+    store.save("machine-1", "ORDER-2", state_b)
+
+    assert store.load("machine-1", "ORDER-1") == state_a
+    assert store.load("machine-1", "ORDER-2") == state_b
+
+
+def test_identifiers_are_isolated_safe_and_deterministic(tmp_path) -> None:
+    store = JsonMaterialStateStore(tmp_path)
+    pairs = [("a/b", "x"), ("a_b", "x"), ("a", "b__x"), ("a__b", "x"),
+             ("../..", "/tmp/escape"), ("", ""), ("a/b", "y")]
+    for index, pair in enumerate(pairs):
+        store.save(*pair, MaterialPollingState(str(index), MaterialIntegrationState()))
+    assert len(list(tmp_path.iterdir())) == len(pairs)
+    for index, pair in enumerate(pairs):
+        assert JsonMaterialStateStore(tmp_path).load(*pair).run_id == str(index)
+    assert all(path.parent == tmp_path and len(path.name) == 69 for path in tmp_path.iterdir())
+
+
+def test_failed_write_preserves_primary_and_cleans_temporary_file(tmp_path, monkeypatch) -> None:
+    import production_analytics.service.material_state_store as module
+
+    store = JsonMaterialStateStore(tmp_path)
+    state = MaterialPollingState("old", MaterialIntegrationState())
+    store.save("machine", "order", state)
+    path = next(tmp_path.iterdir())
+    original = path.read_bytes()
+
+    def fail_dump(payload, file, **kwargs):
+        file.write('{"partial":')
+        raise OSError("disk full")
+
+    monkeypatch.setattr(module.json, "dump", fail_dump)
+    with pytest.raises(OSError, match="disk full"):
+        store.save("machine", "order", MaterialPollingState("new", MaterialIntegrationState()))
+    assert path.read_bytes() == original
+    assert list(tmp_path.iterdir()) == [path]
+
+
+def test_replace_failure_preserves_primary(tmp_path, monkeypatch) -> None:
+    import production_analytics.service.material_state_store as module
+
+    store = JsonMaterialStateStore(tmp_path)
+    state = MaterialPollingState("old", MaterialIntegrationState())
+    store.save("m", "o", state)
+    path = next(tmp_path.iterdir())
+
+    def fail_replace(source, target):
+        assert source.parent == target.parent == tmp_path
+        assert store.load("m", "o") == state
+        raise OSError("replace failed")
+
+    monkeypatch.setattr(module.os, "replace", fail_replace)
+    with pytest.raises(OSError, match="replace failed"):
+        store.save("m", "o", MaterialPollingState("new", MaterialIntegrationState()))
+    assert store.load("m", "o") == state
+    assert list(tmp_path.iterdir()) == [path]
+
+
+@pytest.mark.parametrize("contents", ['{', '[]', '{}', '{"run_id": null}',
+                                      '{"run_id": "r", "integration_state": {}}'])
+def test_corrupt_state_fails_clearly(tmp_path, contents) -> None:
+    store = JsonMaterialStateStore(tmp_path)
+    store.save("m", "o", MaterialPollingState("r", MaterialIntegrationState()))
+    next(tmp_path.iterdir()).write_text(contents)
+    with pytest.raises(ValueError, match="Invalid material polling state"):
+        store.load("m", "o")
+
+
+@pytest.mark.parametrize("field,value", [
+    ("integration_active", "false"), ("cumulative_consumption_kg", float("nan")),
+    ("integrated_running_seconds", -1), ("last_processed_timestamp", "2026-09-03T05:00:00"),
+    ("integration_active", True), ("last_gate_value", True),
+])
+def test_malformed_integration_state_fails(tmp_path, field, value) -> None:
+    import json
+
+    store = JsonMaterialStateStore(tmp_path)
+    store.save("m", "o", MaterialPollingState("r", MaterialIntegrationState()))
+    path = next(tmp_path.iterdir())
+    payload = json.loads(path.read_text())
+    payload["integration_state"][field] = value
+    path.write_text(json.dumps(payload))
+    with pytest.raises(ValueError, match="Invalid material polling state"):
+        store.load("m", "o")

tests/test_postgres_material.py

@@ -0,0 +1,128 @@
+import io
+import sys
+from datetime import UTC, datetime
+from unittest.mock import MagicMock, Mock, patch
+
+import pytest
+
+from production_analytics.calculations.material_consumption import MaterialIntegrationState
+from production_analytics.enlyze.exploration import ConfigurationError
+from production_analytics.enlyze.gateway import EnlyzeProductionRun
+from production_analytics.service.material_polling import MaterialPollResult
+from production_analytics.service.material_runner import MaterialPollingRunner
+from production_analytics.service.postgres_material import (
+    PostgresMaterialSnapshotWriter,
+    PostgresSettings,
+)
+
+ENV = dict(POSTGRES_HOST='localhost', POSTGRES_PORT='5432', POSTGRES_DB='analytics',
+           POSTGRES_USER='writer', POSTGRES_PASSWORD='secret-password')
+NOW = datetime(2026, 1, 1, tzinfo=UTC)
+
+
+@pytest.mark.parametrize('key', ENV)
+@pytest.mark.parametrize('value', [None, '', '  ', '\x00'])
+def test_required_settings(key, value):
+    environment = dict(ENV)
+    if value is None:
+        del environment[key]
+    else:
+        environment[key] = value
+    with pytest.raises(ConfigurationError, match=key) as error:
+        PostgresSettings.from_environment(environment)
+    assert 'secret-password' not in str(error.value)
+
+
+@pytest.mark.parametrize('port', ['0', '-1', '65536', '1.5', 'secret-password'])
+def test_invalid_port(port):
+    with pytest.raises(ConfigurationError, match='POSTGRES_PORT') as error:
+        PostgresSettings.from_environment(dict(ENV, POSTGRES_PORT=port))
+    assert str(error.value) == 'POSTGRES_PORT must be an integer from 1 to 65535'
+
+
+def test_valid_settings_and_password_repr():
+    settings = PostgresSettings.from_environment(ENV)
+    assert (settings.host, settings.port, settings.dbname, settings.user) == (
+        'localhost', 5432, 'analytics', 'writer',
+    )
+    assert settings.password == 'secret-password'
+    assert settings.password not in repr(settings)
+
+
+def test_parameterized_insert_and_connection_lifecycle():
+    driver = MagicMock()
+    connection = driver.connect.return_value.__enter__.return_value
+    writer = PostgresMaterialSnapshotWriter(PostgresSettings.from_environment(ENV))
+    fields = dict(timestamp=NOW, calculation_id='calc', machine_id='machine',
+                  production_order=" 00842'; DROP TABLE x; -- ", run_id='run', consumption_kg=12.5)
+    with patch.dict(sys.modules, psycopg=driver):
+        writer.write(**fields)
+    sql, parameters = connection.execute.call_args.args
+    assert sql.count('%s') == 6
+    assert fields['production_order'] not in sql
+    assert parameters == tuple(fields.values())
+    assert 'ON CONFLICT' in sql
+    connection.execute.assert_called_once()
+    driver.connect.assert_called_once_with(
+        host='localhost', port=5432, dbname='analytics', user='writer',
+        password='secret-password', connect_timeout=10, options='-c statement_timeout=10000',
+    )
+    driver.connect.return_value.__exit__.assert_called_once_with(None, None, None)
+
+
+def test_writer_failure_propagates_and_next_write_reconnects():
+    driver = MagicMock()
+    driver.connect.return_value.__enter__.return_value.execute.side_effect = [
+        RuntimeError('secret'), None,
+    ]
+    writer = PostgresMaterialSnapshotWriter(PostgresSettings.from_environment(ENV))
+    fields = dict(timestamp=NOW, calculation_id='calc', machine_id='machine',
+                  production_order='order', run_id='run', consumption_kg=0)
+    with patch.dict(sys.modules, psycopg=driver):
+        with pytest.raises(RuntimeError):
+            writer.write(**fields)
+        writer.write(**fields)
+    assert driver.connect.call_count == 2
+    assert driver.connect.return_value.__exit__.call_count == 2
+
+
+@pytest.mark.parametrize('consumption', [0, 12.5])
+def test_runner_snapshot_fields_and_none(consumption):
+    result = MaterialPollResult(
+        EnlyzeProductionRun('run', 'machine', None, ' 00842 ', NOW, None),
+        MaterialIntegrationState(consumption, 20),
+    )
+    writer = Mock()
+    output = io.StringIO()
+    MaterialPollingRunner(
+        Mock(poll_once=Mock(side_effect=[None, result])), machine_id='machine',
+        calculation_id='configured-calculation', snapshot_writer=writer,
+        poll_interval_seconds=10, clock=lambda: NOW,
+        sleep=Mock(side_effect=[None, KeyboardInterrupt]), stdout=output,
+    ).run()
+    writer.write.assert_called_once_with(
+        timestamp=NOW, calculation_id='configured-calculation', machine_id='machine',
+        production_order=' 00842 ', run_id='run', consumption_kg=consumption,
+    )
+    assert 'no open Production Run' in output.getvalue()
+    assert f'consumption_kg={consumption:.9f}' in output.getvalue()
+
+
+def test_snapshot_failure_reports_safely_and_continues():
+    result = MaterialPollResult(
+        EnlyzeProductionRun('run', 'machine', None, 'order', NOW, None),
+        MaterialIntegrationState(12.5, 20),
+    )
+    service = Mock(poll_once=Mock(return_value=result))
+    writer = Mock(write=Mock(side_effect=[RuntimeError('secret-password arbitrary SQL'), None]))
+    output, errors = io.StringIO(), io.StringIO()
+    MaterialPollingRunner(
+        service, machine_id='machine', calculation_id='calc', snapshot_writer=writer,
+        poll_interval_seconds=10, clock=lambda: NOW,
+        sleep=Mock(side_effect=[None, KeyboardInterrupt]), stdout=output, stderr=errors,
+    ).run()
+    assert service.poll_once.call_count == writer.write.call_count == 2
+    assert errors.getvalue().count('PostgreSQL snapshot write failed') == 1
+    assert 'secret-password' not in errors.getvalue()
+    assert 'arbitrary SQL' not in errors.getvalue()
+    assert output.getvalue().count('consumption_kg=12.500000000') == 2

tests/test_rotational_material_consumption.py

@@ -0,0 +1,122 @@
+from datetime import UTC, datetime, timedelta
+from pathlib import Path
+from unittest.mock import Mock, patch
+
+import pytest
+import yaml
+
+from production_analytics.calculations.config import (
+    CalculationConfigError,
+    load_material_calculation,
+)
+from production_analytics.calculations.material_consumption import (
+    MaterialConsumptionIntegrator,
+    MaterialIntegratorConfig,
+    rotational_discharge_rate_kg_per_hour,
+)
+from production_analytics.enlyze.gateway import EnlyzeApiGateway
+from production_analytics.service.material_runtime import build_material_runner
+
+
+@pytest.mark.parametrize('speeds,width,factor,expected', [
+    ([3.739, 3.956], 5, 3.12, 7202.52),
+    ([3.739, 3.956], 4.85, 3.12, 6986.4444),
+    ([2], 4, 1.5, 720),
+    ([2, 3, 4], 4, 1.5, 3240),
+])
+def test_conversion(speeds, width, factor, expected):
+    assert rotational_discharge_rate_kg_per_hour(speeds, width, factor) == pytest.approx(expected)
+
+
+@pytest.mark.parametrize('speeds,width,factor', [
+    ([], 5, 3.12), ([float('nan')], 5, 3.12), ([1], 0, 3.12),
+    ([1], float('inf'), 3.12), ([1], 5, 0), ([1], 5, float('nan')),
+    ([1e308], 5, 3.12),
+])
+def test_invalid_conversion(speeds, width, factor):
+    with pytest.raises(ValueError):
+        rotational_discharge_rate_kg_per_hour(speeds, width, factor)
+
+
+@pytest.mark.parametrize('gate_id', ['speed', None])
+def test_gate_and_gap(gate_id):
+    start = datetime(2026, 8, 25, tzinfo=UTC)
+    times = [0, 10, 20, 40, 61, 71, 81]
+    gates = [2, 0.3, 0, 8, 1, 1, 1]
+    client = Mock()
+    client.post_json.return_value.body = {'data': {
+        'columns': ['time', 'right', 'left'] + ([gate_id] if gate_id else []),
+        'records': [[(start + timedelta(seconds=t)).isoformat(), 3.739, 3.956]
+                    + ([gate] if gate_id else []) for t, gate in zip(times, gates, strict=True)],
+    }}
+    samples = EnlyzeApiGateway(client).get_material_samples(
+        machine_id='m', rate_variable_id='unused', gate_variable_id=gate_id,
+        rotational_speed_variable_ids=('right', 'left'), nominal_width_m=5,
+        specific_discharge_kg_per_rev_m=3.12, start=start, end=start + timedelta(seconds=81),
+    )
+    assert all(s.material_rate_kg_per_hour == pytest.approx(7202.52) for s in samples)
+    state = MaterialConsumptionIntegrator(MaterialIntegratorConfig(0.3, 20)).process_many(samples)
+    seconds = 30 if gate_id else 60
+    assert state.integrated_running_seconds == seconds
+    assert state.cumulative_consumption_kg == pytest.approx(120.042 * seconds / 60)
+    assert client.post_json.call_args.args[1]['variables'] == [
+        {'uuid': ref} for ref in ['right', 'left'] + ([gate_id] if gate_id else [])]
+
+
+@pytest.mark.parametrize('field,value', [
+    ('specific_discharge_kg_per_rev_m', None), ('specific_discharge_kg_per_rev_m', 0),
+    ('specific_discharge_kg_per_rev_m', True), ('specific_discharge_kg_per_rev_m', float('inf')),
+    ('application_signal_refs', ['set']), ('rotational_speed_signal_refs', ['']),
+])
+def test_invalid_config(tmp_path, field, value):
+    document = yaml.safe_load(open('config/bento1-material-consumption.yaml'))
+    document['calculations'][0][field] = value
+    path = tmp_path / 'config.yaml'
+    path.write_text(yaml.safe_dump(document))
+    with pytest.raises(CalculationConfigError):
+        load_material_calculation(path)
+
+
+def test_optional_gate_config(tmp_path):
+    document = yaml.safe_load(open('config/bento1-material-consumption.yaml'))
+    del document['calculations'][0]['process_application_calculation_id']
+    del document['calculations'][0]['gate_signal_ref']
+    del document['calculations'][0]['gate_threshold']
+    path = tmp_path / 'config.yaml'
+    path.write_text(yaml.safe_dump(document))
+    (tmp_path / 'material-calibrations.yaml').write_text(
+        Path('config/material-calibrations.yaml').read_text())
+    config = load_material_calculation(path)
+    assert config.gate_signal_ref is None
+    assert config.gate_threshold == 0
+
+
+def test_bento_runtime_wiring(tmp_path, monkeypatch):
+    monkeypatch.setenv('ENLYZE_BASE_URL', 'https://example.invalid/api/')
+    for key, value in dict(HOST='localhost', PORT='5432', DB='analytics',
+                           USER='user', PASSWORD='test').items():
+        monkeypatch.setenv(f'POSTGRES_{key}', value)
+    secrets = tmp_path / 'secret.env'
+    secrets.write_text('ENLYZE_API_KEY=test\n')
+    config = load_material_calculation('config/bento1-material-consumption.yaml')
+    with patch('production_analytics.service.material_runtime.ErpSettings') as erp_settings:
+        runner = build_material_runner(
+            config, poll_interval_seconds=10, state_directory=tmp_path / 'state',
+            secrets_file=secrets, erp_secrets_file=tmp_path / 'erp.env',
+        )
+    service = runner.service
+    assert config.source_mode == 'rotational_discharge'
+    assert service._process_application_calculation_id == 'bento1-fresh-bentonite-application'
+    from production_analytics.service.postgres_material_application import (
+        PostgresMaterialApplicationWriter,
+    )
+    assert isinstance(service._application_writer, PostgresMaterialApplicationWriter)
+    assert service._rotational_speed_variable_ids == (
+        '6e5d2d94-98f9-4cc1-8a88-7987c6282525', 'cd7385c4-337b-4759-ab32-45d65beaf190',
+    )
+    assert service._application_variable_ids == ()
+    assert service._specific_discharge == 2.75
+    assert service._gate_variable_id == 'fef41976-1103-4090-b780-eaeecc02fdfa'
+    assert service._config == MaterialIntegratorConfig(0.3, 20)
+    assert service._nominal_width_provider.workplace == 'Bento 1'
+    erp_settings.from_secret_file.assert_called_once_with(tmp_path / 'erp.env')