FA-63047 / Insurance premium rating / Member archive

Schedule rating credits and debits: Later items overwrite earlier items in a category · case 02

Only the last credit or debit in a category counts.

Member previewVariant 2 · 3 implementations · 9 checks per implementation

Case contract

Input premium, items [[category, per mille; negative is a credit]], caps {category: max abs per mille}, max_credit, max_debit. Unknown category -> 'unknown category <name>'. Items are summed per category, each category clamped to its cap, the total clamped to [-max_credit, max_debit], and premium*(1000+total)/1000 rounded half-up. Return [total, premium].

Why this case matters

Premium rating engines apply ordered tabular rules where one misplaced boundary or step silently misprices policies.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
split credits in one category	`[-25, 357364]`	`[-60, 344535]`	Failed

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