Supplier Defect Unit Rate Calculator

Use one process, asset or item scope, reporting period, cutoff, measurement unit, and written classification rule across both values. All units use the same inspection and disposition rules. Sampling scope and lot selection are disclosed beside the result. Reconcile the numerator to the eligible denominator rather than combining separately filtered reports. A changed population can move the percentage even when underlying operations did not change.

This is an observed inspected-unit rate, not a defect-per-million estimate, shipment rejection rate, or population guarantee. Compare periods or targets prepared from the same rules, not an assumed universal benchmark. Product mix, sampling, schedule changes, reporting delay, exclusions, automation, and event granularity can move the value. Review absolute observations and reason-level evidence beside the percentage before deciding on corrective work.

No. This calculator applies disclosed arithmetic to values you supply; it is not an audit, quality release, maintenance authorization, supplier ruling, forecast, or process certification. A sample rate cannot certify uninspected units or establish contractual acceptance by itself. Retain source records, version the metric definition, test late-arriving events, and obtain accountable review before using the result for incentives, acceptance, or contractual action.