FA-97199 / Recipe scaling and nutrition / Member archive

Roast timing and carryover planner: cook time rounding · case 04

A 1.2 kg medium-rare roast (42 min) is scheduled for 40 minutes instead of 45.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Doneness (trimmed, lower) rare 52C/30 min per kg, medium rare 57/35, medium 63/40, well 71/50; unknown -> error; weight <= 0 -> error. Carryover 2C below 1.5 kg, 4C below 3 kg, else 6C. Beef and lamb pull at target - carryover. Poultry ignores doneness: pull at 74 (no carryover credit) and uses the well-done rate. cook_min = ceiling to a multiple of 5 of weight*rate. rest_min = half-up weight*5 clamped to [10, 30].

Why this case matters

Roast planners must account for carryover cooking and food-safety minimums for poultry.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: cook time rounding	`{"cook_min": 35, "pull_c": 50, "rest_min": 10}`	`{"cook_min": 40, "pull_c": 50, "rest_min": 10}`	Failed

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