FA-12259 / Power metering accounting / Member archive

An interval end label selects the next tariff period · case 04

An interval end label selects the next tariff period.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Rows [end, energy] represent one-slot intervals (end-1,end]. A tariff changes at boundary b: intervals starting below b cost low, others high. Return integer charge; all labels and boundaries are integer slots.

Why this case matters

Meter settlement depends on explicit register and tariff policies; this controlled model makes that policy observable.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
ends at transition	`28`	`8`	Failed

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