FA-94648 / Exam timetabling constraints / Member archive

Conflict pair reported in booking order · case 03

The same conflict appears under different pair orders.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

bookings [room, exam, start, end, setup minutes]; each booking occupies [start - setup, end + cleanup). Two bookings in the same room conflict if their occupied intervals overlap (touching is fine). Return sorted [room, exam, exam] rows with the exam pair sorted.

Why this case matters

Exam rooms need setup and clearance time; conflicts must account for both buffers.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: pair normalisation 1	`[["R1", "ENG", "ART"]]`	`[["R1", "ART", "ENG"]]`	Failed

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