Split-Half a Broken Expense Upload
Apply split-half isolation to a workflow with file, user, browser, and system variables.
Devon cannot upload a receipt PDF before the finance cutoff. The symptom could be file, browser, account, network, or upload service. Split-half isolation: hold most variables steady, change one boundary, and record the result. Changing file name, browser, account, and network in one burst may make the upload work while leaving the team unable to prevent the next failure. Anchor the failing path Same account, same browser, same upload page, same receipt PDF fails again. This confirms the symptom is reproducible enough to test. Without a repeatable path, every later result is shaky. Test a known-good file Same account and…
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