FA-97037 / Recipe scaling and nutrition / Member archive

Baking pan substitution: fill factor direction · case 02

Moving to a bigger pan shrinks the recipe.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Pans: ["round", diameter], ["square", side], ["rect", w, l] in inches; other -> "error: pan". If scale_to_fill, return factor round(area_new/area_old, 2), same minutes, warning None. Otherwise the same batter goes into the new pan: depth ratio = area_old/area_new, minutes = bake_min*(1+(ratio-1)/2) rounded half-up to a multiple of 5, factor 1.0, warning "overflow risk" when ratio > 1.5 else None.

Why this case matters

Bakers swap pan shapes and must scale the batter or adjust bake time for batter depth.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
round to square fill	`{"factor": 0.79, "minutes": 30, "warning": null}`	`{"factor": 1.27, "minutes": 30, "warning": null}`	Failed

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