engineering.process.performance

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 2026-09-23.o2-o3. Calculation version 1.0.1. CVP 1.0.0-proposed. 4/4 golden · 5/5 CVP boundary · 8/8 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 3/3 cross-interface · 6/6 CVP contract. digest 46214495714e. O2: overall Pp/Ppk from a sample vs a separate-module identity (≤2 ULP). Not design-stage Cp/Cpk, not Type A u_A = s/√n, and not Cpm. ≤2 ULP vs O3 applies only to the published tabulated process-performance vectors (centered, shifted, low, an alias, population ddof, a negative Ppk, four points, and one awkward sample). It is not a whole-domain guarantee and does not cover design-stage Cp/Cpk, Type A u_A, or Cpm.

• Golden (oracle-backed) 4 / 4
• CVP boundary 5 / 5
• Invalid input 8 / 8
• 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 Overall Pp, Ppk, Ppu, Ppl from a sample standard deviation, + O3 mpmath tabulated Pp/Ppk.
• Assurance Engineering
• Deferred Not design-stage Cp/Cpk from a stated σ, not Type A u_A = s/√n, and not Cpm.

• 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 sha256:7f2cbcc0ea9bc5d06695cf586cac81e4643f776cb48272b982479155cea7e090

Input schema sha256:3968d12d5dc28d7f1a26050802323b1300115ab711e7253d6b0aaad3d61a1431 · Output schema sha256:3f75d729e8362ae3e8f8c654dd07db03b5fffc6931166a70dd2f3c6e3bce1be6 · 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

process-performance

Engine

process-performance

Engine build

2026-09-23

Evidence core

2026-09-23T13:59:18.740Z

Rendered

2026-10-23T01:27:11.167Z

Last reviewed

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Assumptions

• Overall sample s via summarizeSample (ddof=1 default) — not a stated design σ
• Not design-stage Cp/Cpk and not Type A u_A
• Not within-subgroup SPC and not Monte Carlo simulated indices
• Two-sided limits; USL > LSL

Limitations

• Overall sample s — not a stated design σ and not within-subgroup SPC
• Not design-stage Cp/Cpk and not Type A u_A = s/√n
• Not Monte Carlo simulated indices
• Two-sided LSL/USL required; USL must be greater than LSL