FA-94665 / Exam timetabling constraints / Member archive

Repeated assignment row charges the room penalty again · case 05

Duplicate rows from a timetable merge inflate the room cost.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Assignment rows [exam, room, period] (a split exam has one row per room; rows may repeat). Each exam pays its period penalty once per distinct period it occupies and each room penalty once per distinct (exam, room). Return [period penalty, room penalty, total].

Why this case matters

Period and room preferences are soft costs that must not be multiplied by exam splitting.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: repeated row room charge 1	`[40, 22, 62]`	`[40, 16, 56]`	Failed

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