FA-67675 / Elevator dispatch scheduling / Member archive

Car relevelling with doors open: fault handling · case 05

A relevel continues after a fault sample.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

While standing at a floor the level offset (mm) is sampled. Beyond +-200 mm the sample is a fault and any relevel stops. Relevelling starts when |offset| > 10 and continues until |offset| <= 3 (hysteresis). A relevel runs with doors open when |offset| <= 75, otherwise the doors close first (close-relevel). Output hold, relevel, close-relevel or fault per sample.

Why this case matters

Lift group controllers make these decisions many times per minute; a wrong answer strands passengers, wastes trips or overrides a safety rule.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: fault clears relevelling	`["relevel", "fault", "relevel"]`	`["relevel", "fault", "hold"]`	Failed

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