Ensuring product quality at every manufacturing stage
| Stage | What Checked |
|---|---|
| Incoming QC | Material certificates, visual inspection |
| In-Process QC | Process parameters, first-piece approval |
| Pre-Shipment Inspection | AQL random sampling, functional tests |
| Loading Supervision | Count verification, loading condition |
AQL 0.65 - Critical defects. AQL 2.5 - Major defects. AQL 4.0 - Minor defects.
Major companies: SGS, Bureau Veritas, TUV, Intertek. Typical cost: $300-$600 per man-day.