engineering.process.cpmk_performance

• Golden tests 0 / 0
• Boundary tests 6 / 6
• Property tests 3 / 3
• Production surface contract 4 / 4
}
• Engine tested Yes
• Source checked Yes
• Artifact integrity PASS
• Production attestation Embedded snapshot: STALE · Last attested schema matched 1.0.0 snapshot / local build · Semantic contract ✓ · Last attestation PASS · current evidence changed · re-attestation required · Public/cache ✓ · Origin ✓ · Live production status PASS (0 stale; 164 CURRENT) @ 2026-09-16T06:44:24.909Z
• Semantic contract PASS
• Evidence attested at 2026-09-16T06:44:24.203Z
• Last production check 2026-09-16T06:44:24.203Z
• Public / cache PASS
• Origin PASS
• Supplemental domain review Not performed
• Named expert review Not performed

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

Fingerprint sha256:cd2f6404e7c539f5af3c2d7fe063bd75dfc222cb63c8c8b53236902094d368a2

Input schema sha256:5f9410299d4db124f6875cbef98dd70e86112c6f5d8d4ce2e4c4afdc1ade4c59 · Output schema sha256:37d45708a84a4b0d44d5bfa58475878565d60d2d797af053494488286635f560 · 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

cpmk-performance

Engine

cpmk-performance

Engine build

2026-09-16

Evidence core

2026-09-16T21:07:40.795Z

Rendered

2026-09-16T22:38:08.850Z

Last reviewed

—

Assumptions

• Overall Taguchi Ppmk = min(USL−x̄, x̄−LSL)/(3√(s²+(x̄−target)²)) from a sample. s is summarizeSample.
• Not design-stage Cpmk, not Ppk (no target), not Ppm (two-sided span), and not a 1.33 verdict.

Limitations

• Overall sample s — not design-stage Cpmk from a stated σ
• Not Ppk (Ppk has no target in the denominator)
• Not Ppm (that uses the two-sided span USL−LSL)
• This page does not issue a Ppmk≥1.33 verdict