FA-94494 / Exam timetabling constraints / Member archive

Period durations looked up with one-based indices · case 04

Each exam is checked against the previous period's length.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

timetable maps exam -> period index, exams exam -> duration, periods -> duration. Duration violations (exam longer than its period) are listed first by exam id; then for each constraint in order: after (a must be in a strictly later period than b), exclusion (different periods), coincidence (same period), exclusive (a must be alone in its period). Return violation rows.

Why this case matters

Hard-constraint validation gates every candidate exam timetable.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: period index base 1	`[["duration", "BIO130"], ["duration", "CHEM120"], ["duration", "HIST140"], ["duration", "MATH101"], ["duration", "MATH101H"], ["duration", "PHYS110"], ["after", "CHEM120", "MATH101H"]]`	`[["duration", "BIO130"], ["duration", "MATH101"], ["duration", "MATH101H"], ["duration", "PHYS110"], ["after", "CHEM120", "MATH101H"]]`	Failed

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