UAT regression framework for billing system upgrades. Tolerance-aware diffing of pre/post-upgrade report extracts: 100% catch rate measured against 1,299 planted regressions across 7 classes, zero false alarms on a benign-only control, 1M rows in 67s, and a formatted Excel sign-off evidence workbook as the first-class artifact.
python sql data-validation excel test-automation regression-testing openpyxl data-quality duckdb healthcare-it revenue-cycle-management uat-testing hospital-billing ehr-upgrades
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Updated
Jul 16, 2026 - Python