engineering.msa.hysteresis

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 1.0.1 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 · 4/4 CVP boundary · 5/5 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 6/6 CVP contract. digest 0c987c084d1c. O2: max |y_up − y_down| vs a separate-module identity (≤2 ULP). Not a %Hysteresis verdict. ≤2 ULP vs O3 applies only to the published tabulated hysteresis vectors. Not a %Hysteresis verdict.

• Golden (oracle-backed) 4 / 4
• CVP boundary 4 / 4
• Invalid input 5 / 5
• 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 Hysteresis = max |y_up − y_down| over n≥2 paired stations, + O3 mpmath tabulated hysteresis.
• Assurance Engineering
• Deferred Not a %Hysteresis 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:f80080654d677d691f351e90675f72660483cdea30b9e501a4b0d9a090b52098

Input schema sha256:1f2b30bb499681531fdf96098a7ce1538158b21e2c3f8ed0ef056c85ea3c3f2d · Output schema sha256:34e21b114f51288c9cfdc1494576170079926b1b9a4ca3c4e1c556a4384c77e5 · 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

hysteresis

Engine

hysteresis

Engine build

2026-09-24

Evidence core

2026-09-24T23:55:58.629Z

Rendered

2026-10-23T01:27:11.206Z

Last reviewed

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Assumptions

• VIM 4.17 hysteresis as max |y_up − y_down| at index-paired stations
• n≥2; pairing is by index, not interpolated vs xref
• Not OLS linearity, not a %Hysteresis verdict, and not AIAG GRR

Limitations

• Maximum paired |y_up − y_down| — not a %Hysteresis / process-variation verdict
• Not OLS of ε versus xref (Linearity) and not a single-shot measurement error
• Does not take T and does not issue pass/fail
• n≥2 index-paired points; not AIAG GRR