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IP/copyright fix: ComputePLr reproduced the EN ISO 13849-1 Anhang A risk-graph decision table (S/F/P -> PLr a..e) and SeverityToS/ExposureToF its parameter binning, emitted into every hazard description. Removed — we may not reproduce DIN/Beuth norm logic. Replaced with BreakPilot's OWN risk model: - risk_estimation.go: probability (W) + avoidance (P) estimated from public, permissively-licensed accident statistics (Eurostat ESAW, CC BY 4.0) by contact mode, calibrated to our ground-truth corpus; own risk index + bands. - iace_handler_init.go now emits "Risikoeinschaetzung (BreakPilot-Modell): S F W P -> Risiko: <level>" instead of the norm PLr string. - DATA_SOURCES.md: data provenance + license register (ESAW CC BY 4.0; BLS/OSHA public domain; HSE OGL; DGUV + DIN/Beuth explicitly excluded). - gt_risk_benchmark_test.go: first GT validation of risk numbers — W within +-1 99%, P 93% vs the professional across both ground truths. Removed risk_graph_test.go (pinned the reproduced norm table). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
55 lines
2.6 KiB
Markdown
55 lines
2.6 KiB
Markdown
# Risk-estimation data sources & licenses
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Provenance for the probability (W) / avoidance (P) tiers in `risk_estimation.go`
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(`contactModeTable`). We do **not** vendor any raw dataset — only the small
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aggregate facts used as anchors plus our own calibrated tiers live in code.
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## What we use and how
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The tiers are derived in two steps:
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1. **Anchor** — the *relative ordering* of injury contact modes from public,
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permissively-licensed occupational-accident statistics (which mechanisms are
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more vs. less frequent).
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2. **Calibrate** — adjust the tier *values* to our own ground-truth corpus
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(the professional's W/P per mode). Well-sampled modes are set to the GT mean;
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sparse modes use conservative defaults (no overfitting to a 2-GT sample).
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The numbers in code are therefore **ours**, not a copy of any dataset, and they
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do **not** reproduce any standard's risk-graph table, decision tree or matrix.
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## Primary source — Eurostat ESAW
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- **Dataset:** European Statistics on Accidents at Work (ESAW), contact mode of injury.
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- **License:** **CC BY 4.0** — commercial and non-commercial reuse permitted,
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source acknowledgement required.
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- **Attribution string:** `Source: Eurostat (ESAW), CC BY 4.0` — surface this in
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any generated risk-assessment export that shows engine risk numbers.
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- **URL:** https://ec.europa.eu/eurostat/statistics-explained/index.php/Accidents_at_work_-_statistics_on_causes_and_circumstances
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- **Aggregate facts used (anchor only):** contact-mode shares of accidents at
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work, e.g. impact with stationary object ~24%, struck by moving object ~13%
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(non-fatal) / ~24% (fatal), trapped/crushed ~14% (fatal), contact with sharp
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agent ~15%. Retrieved 2026-06.
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## Acceptable supplements
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- **US BLS / OSHA** (Bureau of Labor Statistics, occupational injuries) — **U.S.
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Government work, public domain**; free for any use.
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- **UK HSE** (RIDDOR / kinds-of-accident) — **Open Government Licence v3**;
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commercial reuse with attribution.
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## Explicitly excluded
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- **DGUV statistics** — terms grant only editorial use and forbid modification
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/ re-licensing; **unsuitable for a commercial product**. Not used.
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- **DIN / Beuth / ISO / IEC standards** (e.g. risk-graph tables, parameter
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decision trees, SIL/PL matrices) — copyrighted; **not reproduced or
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re-implemented**. Our model uses only the universal, non-protectable risk
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*dimensions* (severity, frequency, probability, avoidance).
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## Maintenance
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When a tier in `contactModeTable` changes, record the source figure and the GT
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calibration basis here. Add this file to the repository SBOM / license register
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alongside software dependencies.
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