Prioritize a four-hour test window for an order release.
Instruction: Choose a complete set of checks within the time limit, show your arithmetic, and state the remaining risk.
All inputs are fictional planning estimates. You have 240 minutes including investigation and reporting. Candidate checks are: changed payment retry path, 90 minutes; changed discount calculation, 45 minutes; unchanged login smoke test, 20 minutes; changed receipt typography, 30 minutes; changed stock reservation under concurrent orders, 60 minutes; release summary and triage reserve, at least 25 minutes. Payment errors can duplicate charges; reservation errors can oversell. Existing unit checks passed, but there is no other integration evidence for the three changed business paths. Each listed check must be run in full or explicitly deferred.
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I would allocate 90 minutes to payment retry, 60 to concurrent stock reservation, 45 to discounts, and 20 to login smoke, leaving 25 for triage and the release summary. That totals 240 minutes...
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