engineering.msa.gauge_capability

Three distinct suites: educational examples on the calculator page, this legacy regression count (11/11 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.1 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-09-25.o2-o3. Calculation version 1.0.1. CVP 1.0.0-proposed. 4/4 golden · 5/5 CVP boundary · 6/6 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 6/6 CVP contract. digest 48f057c8d64f. O2: Cg and Cgk vs a separate-module sample identity (≤2 ULP). Not Gauge R&R. ≤2 ULP vs O3 applies only to the published tabulated Cg vectors. Not Gauge R&R.

• Golden (oracle-backed) 4 / 4
• CVP boundary 5 / 5
• Invalid input 6 / 6
• Property 1 / 1
• Metamorphic 1 / 1
• O3 high-precision 8 / 8
• Cross-interface 2 / 2
• CVP contract 6 / 6
• Interfaces PASS · UI (SSR) / REST / MCP
• Interface claim ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only.
• Verified scope Cg = (frac T)/(6s) and Cgk = (frac T/2 − |x̄−xm|)/(3s), + O3 mpmath tabulated Cg.
• Assurance Engineering
• Deferred Not Gauge R&R and not a capability verdict.

• release artifacts aligned PASS
• schema output required declared PASS
• schema valid input executes PASS
• engine success output validates schema PASS
• schema rejects incomplete input PASS
• rest success payload validates schema PASS

Fingerprint sha256:3e8f2baa118d2907f7c3eb3c4117faaa245f8028a6288939e295f93b94b0a3e3

Input schema sha256:989fcd4d1ddbe3f995f554376698d13cbff3facf9394eff0371e8e153a891df9 · Output schema sha256:56f6ba9b22af77d42e20a27e3dedc82287ae9b42d1c6f58a1c9a3fc324ff20c3 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Tool

gauge-capability

Engine

gauge-capability

Engine build

2026-09-24

Evidence core

2026-09-24T23:23:31.824Z

Rendered

2026-10-23T01:27:11.205Z

Last reviewed

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Assumptions

• Type-1 Cg = (frac·T)/(6s), Cgk = (frac·T/2 − |x̄−xm|)/(3s). frac defaults to 0.2 (Bosch / VDA 5).
• s is overall sample s of repeats on a master. Not AIAG GRR, not Cp/Cpk, and not a Cg≥1.33 verdict.
• Exactly one spec form: lsl+usl, T/span, or half-width tol
• frac is a tolerance fraction (0 < frac ≤ 1), not coverage factor k

Limitations

• Type-1 study on a master — not AIAG GRR compose (EV/AV/PV)
• Not process Cp/Cpk or Pp/Ppk
• Does not issue a Cg≥1.33 pass/fail
• frac is a tolerance fraction (default 0.2), not coverage factor k