FA-67805 / Elevator dispatch scheduling / Member archive

Energy saving car shutdown: reactivation trigger · case 05

A car is reactivated at exactly 45 s, or reactivation runs past the fleet size.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Samples [t, demand, max wait]. If the max wait exceeds 45 s and some car is shut down, one car is reactivated and the low-demand timer cleared. Otherwise, while demand < low_demand, a timer runs from the first low sample; once it has run 600 s or more and more than min_active cars are active, one car shuts down and the timer restarts at that time. Any sample with normal demand clears the timer. Output active cars 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
sampled regression 76	`[4, 4, 3, 2, 3, 3, 3, 4, 4]`	`[4, 4, 3, 2, 1, 1, 1, 1, 2]`	Failed

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