engineering.conformity.normalized_error

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 2026-09-24.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 · 3/3 cross-interface · 6/6 CVP contract. digest 7b7a4c158ed2. O2: proficiency-testing En vs a separate-module hypot identity (≤2 ULP). Not zeta, not TUR, and not an ILAC G8 specification decision. ≤2 ULP vs O3 applies only to the published tabulated En vectors (pass, the |En|=1 boundary, fail, an alias, a negative result, one awkward pair, equal expanded uncertainties, and a close pair). It is not a whole-domain guarantee and does not cover zeta, TUR, or an ILAC G8 specification decision.

• 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 3 / 3
• 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 Proficiency-testing En from ylab, xref, and already-expanded Ulab and Uref, + O3 mpmath tabulated En.
• Assurance Engineering
• Deferred Not zeta (standard uncertainties), not TUR, and not an ILAC G8 specification decision.

• 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 sha256:96bdb042a5e8e2bb7c4d1941a7b104471677cd35fd98e746cea1571c3e30ba02

Input schema sha256:43d7d78ee321f3895d41974819980f5f1a3b01d3ca5d500573979af783e1d06b · Output schema sha256:23b69c8ef3da6010a7217fa7afd23f653303e816debcb1193711d2b2aeb6c0b6 · 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

normalized-error

Engine

normalized-error

Engine build

2026-09-24

Evidence core

2026-09-24T13:48:41.685Z

Rendered

2026-10-22T08:54:34.776Z

Last reviewed

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Assumptions

• ISO 13528 / ISO/IEC 17043 En with already-expanded Ulab and Uref
• |En| ≤ 1 is pass; |En| > 1 is fail
• Not zeta (standard u), not TUR, and not an ILAC G8 spec decision

Limitations

• Ulab and Uref are already expanded — this page does not compute U = k·u
• Not the zeta-score (that uses standard u, not U)
• Not TUR and not an ILAC G8 specification decision on y
• |En| ≤ 1 is pass; the test does not add a warning zone