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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>
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Risk-estimation data sources & licenses
Provenance for the probability (W) / avoidance (P) tiers in risk_estimation.go
(contactModeTable). We do not vendor any raw dataset — only the small
aggregate facts used as anchors plus our own calibrated tiers live in code.
What we use and how
The tiers are derived in two steps:
- Anchor — the relative ordering of injury contact modes from public, permissively-licensed occupational-accident statistics (which mechanisms are more vs. less frequent).
- Calibrate — adjust the tier values to our own ground-truth corpus (the professional's W/P per mode). Well-sampled modes are set to the GT mean; sparse modes use conservative defaults (no overfitting to a 2-GT sample).
The numbers in code are therefore ours, not a copy of any dataset, and they do not reproduce any standard's risk-graph table, decision tree or matrix.
Primary source — Eurostat ESAW
- Dataset: European Statistics on Accidents at Work (ESAW), contact mode of injury.
- License: CC BY 4.0 — commercial and non-commercial reuse permitted, source acknowledgement required.
- Attribution string:
Source: Eurostat (ESAW), CC BY 4.0— surface this in any generated risk-assessment export that shows engine risk numbers. - URL: https://ec.europa.eu/eurostat/statistics-explained/index.php/Accidents_at_work_-_statistics_on_causes_and_circumstances
- Aggregate facts used (anchor only): contact-mode shares of accidents at work, e.g. impact with stationary object ~24%, struck by moving object ~13% (non-fatal) / ~24% (fatal), trapped/crushed ~14% (fatal), contact with sharp agent ~15%. Retrieved 2026-06.
Acceptable supplements
- US BLS / OSHA (Bureau of Labor Statistics, occupational injuries) — U.S. Government work, public domain; free for any use.
- UK HSE (RIDDOR / kinds-of-accident) — Open Government Licence v3; commercial reuse with attribution.
Explicitly excluded
- DGUV statistics — terms grant only editorial use and forbid modification / re-licensing; unsuitable for a commercial product. Not used.
- DIN / Beuth / ISO / IEC standards (e.g. risk-graph tables, parameter decision trees, SIL/PL matrices) — copyrighted; not reproduced or re-implemented. Our model uses only the universal, non-protectable risk dimensions (severity, frequency, probability, avoidance).
Maintenance
When a tier in contactModeTable changes, record the source figure and the GT
calibration basis here. Add this file to the repository SBOM / license register
alongside software dependencies.