Audit Trails Aren't "On/Off": How To Build A Review Program QA Can Actually Sustain

An audit trail that is switched on but never reviewed tells an inspector the organization knew what to capture and never built the program to evaluate it. In maintenance and calibration environments, that pattern shows up as missing SOPs, undefined cadences, and reason-for-change entries like "updated." Five checks separate a functioning control from a log, followed by guidance on scoping to critical data, structuring reasons, tiering review by risk, and sampling so QA is not reading logs full time. A worked exception review, an inspection evidence package, a sample review log, and a ramp-up sequence for teams starting from zero are included. Test your own program against what inspectors expect.