01 · 6 min read
How an AQL inspection works
What inspectors check and how pass or fail is decided.
What AQL means
AQL stands for Acceptable Quality Limit. Instead of checking every piece, the inspector checks a random sample. The sample size depends on your order quantity and the inspection level, usually General Level II.
For an order of 3,000 pieces at Level II, for example, the inspector checks 125 pieces chosen at random from different cartons.
Defect levels and limits
Defects are sorted into three levels. Critical defects make the product unsafe or illegal; the limit is usually zero. Major defects make it unsellable or likely to be returned. Minor defects are small cosmetic issues.
Each level has a maximum number allowed in the sample. A common setting is AQL 0 for critical, 2.5 for major and 4.0 for minor defects. If the count goes above the limit, the inspection fails.
When and how to inspect
The pre-shipment inspection happens when production is finished and at least 80% of the goods are packed, so the sample represents what will ship.
Besides counting defects, inspectors check quantities, packaging, labels, measurements, function tests and anything on your own checklist, with photos of each finding.
