FA-67749 / Elevator dispatch scheduling / Member archive

Traffic pattern detection with hysteresis: exit hysteresis · case 04

Up-peak flickers off as soon as the lobby share dips below the entry level.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Per 5-minute window, total = lobby_up + other_up + down. up% = lobby_up*100//total and down% = to_lobby*100//total (0 if total is 0). An active peak ends when its percentage falls below 40 or total < 10. From interfloor (including just after a peak ended) a window with total >= 10 enters up-peak at up% >= 60, else down-peak at down% >= 60. Output the mode per window.

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: hysteresis keeps up-peak	`["up-peak", "interfloor"]`	`["up-peak", "up-peak"]`	Failed

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