FA-63223 / Insurance premium rating / Member archive

Retrospective rating adjustment: Bounds are enforced before the tax multiplier · case 03

Capped or floored retro premiums exceed the plan bounds by the tax multiplier.

Member previewVariant 3 · 3 implementations · 9 checks per implementation

Case contract

Input standard premium, basic, lcf, tax (x1000), min and max (per mille of standard), loss_limit, claims (negative = recovery). max<min -> 'invalid bounds'. Limited losses = max(0, sum(min(claim, limit))). Retro = (standard*basic + limited*lcf)*tax, bounded by [standard*min, standard*max] (bounds already include tax), rounded half-up. Return [limited, retro].

Why this case matters

Retrospective plans settle premium after losses, so each conversion factor and bound has to sit at the right step.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
large claim limited	`[5026063, 4334387]`	`[5026063, 4127988]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.