FA-95048 / Warehouse slotting and bin packing / Member archive

FEFO putaway: 30-day window made exclusive · case 03

A lot expiring exactly 30 days from the resident lot is refused a shared bin.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

bins [[bin, sku|None, lot, expiry_day, qty, capacity, distance]]; receipt [sku, lot, expiry_day, qty]. A bin is empty when sku is None or qty is 0. Preference: (1) non-empty bin with same sku and lot and room (capacity-qty >= receipt qty), nearest then id; (2) same sku, different lot, expiry within 30 days either way, room; smallest expiry gap, nearest, id; (3) empty bin with capacity >= qty, nearest then id; else "HOLD".

Why this case matters

FEFO storage keeps lots with similar expiry together so the earliest expiring stock ships first.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
generated mix 40	`"B5"`	`"B4"`	Failed

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