FA-66509 / Airline fare rule evaluation / Member archive

Routing exactly on a band limit pushed to the next band · case 04

A routing exactly 5% over MPM is charged a 10M surcharge.

Member previewVariant 4 · 3 implementations · 11 checks per implementation

Case contract

Input {'tpm':[segment miles],'tpd':deduction miles,'mpm'}. Total = sum(TPM) - TPD. Total <= MPM -> ['M',0]; else the smallest band b in 5,10,15,20,25 with total <= MPM*(1+b/100) -> ['bM', b]; beyond 25% -> 'ERR_EXCEEDS'. Comparisons are exact integer arithmetic.

Why this case matters

The mileage system surcharges fares in 5% bands when the ticketed routing exceeds the maximum permitted mileage.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
exactly 5 percent over	`["10M", 10]`	`["5M", 5]`	Failed

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