engineering.msa.linearity

Three distinct suites: educational examples on the calculator page, this legacy regression count (9/9 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 419aa3b30091. O2: OLS slope and intercept of ε versus xref (≤2 ULP). Not a %Linearity verdict. ≤2 ULP vs O3 applies only to the published tabulated linearity vectors. Not a %Linearity verdict.

• 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 OLS of ε = ylab − xref versus xref, + O3 mpmath tabulated linearity.
• Assurance Engineering
• Deferred Not a %Linearity verdict and not Gauge R&R.

• 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 sha256:94ca4d65f7da86710fb9639b9076c5cae775d2d5a8d8467f3e216fb66ab61faa

Input schema sha256:2458c91510ec28c3f252113ffc85f66875852df8419b203dc9f6eb467b57b288 · Output schema sha256:6f460ef38c0ae10a84b1e110bfd48ee8e830756668e34d182fc3cfe8ce41e283 · 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

linearity

Engine

linearity

Engine build

2026-09-24

Evidence core

2026-09-24T23:38:14.098Z

Rendered

2026-10-23T01:27:11.205Z

Last reviewed

—

Assumptions

• Ordinary least squares of ε = ylab − xref versus xref. slope = dε/d(xref).
• n≥3 paired points. xref must not all be equal.
• Not a single-master bias, not Type-1 Cg/Cgk, and not a %Linearity pass/fail.
• Does not take T.

Limitations

• Ordinary least squares of ε versus xref — not a %Linearity / process-variation verdict
• Not a single-master bias (Accuracy) and not Type-1 Cg/Cgk
• Does not take T and does not issue pass/fail
• n≥3 paired points; xref must not all be equal