FA-94869 / Warehouse slotting and bin packing / Member archive

ABC velocity: report follows ranking not input · case 04

The class report is returned in velocity rank order, misaligning it with the caller item master rows.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input [[sku, weekly_picks]]. Rank by picks descending then sku ascending. SKUs with equal picks form a tie group whose cumulative prior share is the picks of strictly faster groups. picks 0 -> D (dead stock); prior share < 80% -> A; < 95% -> B; else C. Return [[sku, class]] in input order.

Why this case matters

Velocity classes drive which SKUs are slotted into forward pick areas.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
generated mix 25	`[["S15", "A"], ["S06", "A"], ["S19", "B"], ["S25", "B"]]`	`[["S25", "B"], ["S06", "A"], ["S15", "A"], ["S19", "B"]]`	Failed

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