Published methodology
CMMS-BS method 0.4, published and versioned.
Method 0.4 · Release 11 · deployed September 13, 2026, 00:07 UTC (September 12, 8:07 p.m. ET)
Dataset last updated: September 12, 2026
Unit of analysis
Entity + mineral + supply-chain role + product niche + reporting period + company or facility level.
Six disclosure criteria
Derived from the five-step framework of the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals, third edition.
| Criterion | OECD framework |
|---|---|
| Sourcing policy | OECD Step 1 |
| Accountable oversight | OECD Step 1 |
| Upstream transparency | OECD Step 2 |
| Assessment evidence | OECD Step 4 |
| Risk response | OECD Step 3 |
| Reporting and limitations | OECD Step 5 |
Evidence states
- ✓ Supported — 2 points.
- ◐ Partial — 1 point.
- ! Gap — 0 points. Requires a cited, affirmative gap; silence is not a gap.
- ? Unknown — excluded from the observed denominator and lowers coverage.
- — Not applicable — excluded from both denominators, with a recorded reason.
Score and coverage
Coverage = round(100 × observed ÷ applicable criteria)
Example: 5 Supported + 1 Partial = 11 ÷ 12 = 92, with 100% coverage.
Publication gates
A band is published only with at least 80% coverage, at least four criteria observed, dated evidence no more than 730 days old, and no review hold.
- Insufficient or undated evidence: Unrated.
- Stale evidence: Historical.
- A review hold overrides any band.
An overall-risk overlay is defined but is not published until an independent review is complete.
Verification record
All 128 observed-score calculations recomputed with no mismatch.
Workbook SHA-256:2d95e2b9983c973a4562b31c3279c6f50bebdcd9ccccf83637c9e0a56a847bc6
Source commit:0fef66204de1c38b20041420c051755071a9bdea
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Method 0.5 and a blind independent specialist review.
CMMS-BS assesses what public sourcing disclosures establish. It is not a certification, an audit or legal advice.