FA-85700 / Ride-hailing fare and surge pricing / Member archive

Minimum fare applied after the width adjustment · case 05

Short trips show a range whose low end equals the high end.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Show a fare range from a point estimate in cents: low = 90% of the estimate floored to whole dollars, but never below the minimum fare; high = 110% of the estimate rounded up to whole dollars; if the range is narrower than 2.00 the high end becomes low + 2.00. Return [low, high] cents.

Why this case matters

Ride-hailing prices are computed per trip at scale; ordering, unit and boundary slips become systematic over- or under-charging.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: minimum clamp ordering	`[1000, 800]`	`[1000, 1200]`	Failed

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