Inspection Standards

QC China follows the ANSI/ASQ Z1.4-2008 (AQL) sampling standard, widely used to assess production lots without inspecting every single item. This standard has equivalents in various international organizations, ensuring consistency in sample sizes and defect limits. The default Acceptable Quality Level (AQL) is Level II, with allowances for defects depending on client specifications. This approach helps define how many samples to inspect and sets clear guidelines on acceptable defect rates.