FA-12427 / Laboratory measurement reporting / Member archive

Carryover correction skips an intervening wash injection · case 02

Carryover correction skips an intervening wash injection.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

For chronological [kind,raw] injections, subtract one tenth of the preceding raw injection from sample signals. First predecessor is zero. Washes emit nothing but update predecessor. Return Fraction strings; kinds sample or wash.

Why this case matters

A deterministic synthetic laboratory reporting model isolates a software metadata contract; it is not a clinical procedure.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
wash residual becomes predecessor	`["200", "20"]`	`["200", "38"]`	Failed

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