How to Correctly Photograph Quality Issues for China Supplier Disputes

AQL (Acceptable Quality Level) is a statistical sampling method. For most consumer goods, AQL 2.5 for major defects and 4.0 for minor defects is standard. Critical defects always require zero tolerance. The sampling size is determined by ISO 2859 or ANSI/ASQ Z1.4 tables. A batch of 3,000 units requires 125 samples. If more than 7 major defects are found, the entire batch fails and requires 100% inspection. Always specify AQL levels in your purchase contract.

The 5-point quality control system is the industry standard for China manufacturing. Point 1: Raw Material QC — verify incoming materials against specifications before production. Point 2: In-Process QC — inspect during production, not just at the end. Point 3: Pre-Shipment QC — random sampling before container loading. Point 4: Loading Supervision — confirm quantity, packaging, and marks. Point 5: Corrective Action — when defects are found, ensure the factory implements permanent fixes, not quick patches.