FA-67409 / Elevator dispatch scheduling / Member archive

Door dwell time calculation: nudging onset · case 04

The door keeps reopening on the third obstruction instead of nudging.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Dwell time in deciseconds: base 40 for a hall call stop (or a stop with both hall and car calls), 25 for a car-call-only stop. Accessible mode extends the base by half (integer). Every passenger beyond the first adds 10. The result is capped at 150. From the third reopen onward the door nudges with a fixed dwell of 20.

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: third reopen with nobody moving	`{"dwell_ds": 25, "nudge": false}`	`{"dwell_ds": 20, "nudge": true}`	Failed

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