engineering.msa.gauge_rr

Three distinct suites: educational examples on the calculator page, this legacy regression count (8/8 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 1.0.0 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 2026-09-16.o2-o3. Calculation version 1.0.0. CVP 1.0.0-proposed. 5/5 golden · 4/4 CVP boundary · 7/7 invalid · 3/3 property · 2/2 metamorphic · 8/8 O3 · 4/4 cross-interface · 4/4 CVP contract. digest 91696d47fa7d. O2: AIAG GRR/TV/%GRR/ndc and range EV=R̄/d2 vs separate-module identities (≤2 ULP). Not full ANOVA, not %tolerance vs spec, not Cg. ≤2 ULP vs O3 applies only to the published tabulated GRR vectors (stated EV, range EV, custom d2, AV=0, PV=0, aliases, scale). It is not a whole-domain guarantee and does not cover full ANOVA or %tolerance vs spec.

• Golden (oracle-backed) 5 / 5
• CVP boundary 4 / 4
• Invalid input 7 / 7
• Property 3 / 3
• Metamorphic 2 / 2
• O3 high-precision 8 / 8
• Cross-interface 4 / 4
• CVP contract 4 / 4
• 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 AIAG Gauge R&R compose GRR/TV/%GRR/ndc from EV/AV/PV, optional range EV=R̄/d2 + O3 mpmath tabulated GRR.
• Assurance Engineering
• Deferred Not a full ANOVA Gauge R&R, not nested study tables, not %tolerance vs spec, not Cg/Cgk, and not X̄/R constants beyond d2 for n=2.

• release artifacts aligned PASS
• schema valid input executes PASS
• engine success output validates schema PASS
• schema rejects incomplete input PASS

Fingerprint sha256:b3b98497ba42d897e007438b58bf39c5b25e1fb4218b7c18f6de34c3825fbded

Input schema sha256:7fafa61ccb90494e4b9a004b46e43e812d4467c383095577a0fece97c8e38ed4 · Output schema sha256:700648723e9499b8fc173be03bae0e5442391fa64b1af01d44fe2935cb09691a · 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-rr

Engine

gauge-rr

Engine build

2026-09-16

Evidence core

2026-09-16T21:07:40.795Z

Rendered

2026-09-16T22:38:08.856Z

Last reviewed

—

Assumptions

• AIAG compose: GRR=√(EV²+AV²), TV=√(GRR²+PV²), %GRR=100·GRR/TV, ndc=1.41·PV/GRR
• Range-method EV = R̄/d2 (d2 defaults to 1.128 for n=2). Not a full ANOVA Gauge R&R.
• Provide ev or rbar, not both

Limitations

• AIAG compose of stated EV, AV, PV — not a full ANOVA Gauge R&R
• Range-method EV uses d2 default 1.128 (n=2)
• GRR must be > 0 for ndc