The number of Critical, Major and Minor defective units allowed are controlled by the Acceptable Quality Level (AQL)

AQL is a number that determines the maximum number of allowable defective units in a sample. AQLs can be considered as an statistical average. It is however, not a percentage. The AQL can also have an influence on the size of the sample for very small or very large consignments,.

Different AQLs may be designed for different defects such as critical, major and minor defects. The AQL should be agreed upon between the buyer and the supplier, prior to manufacture or delivery of the product.

The following AQLs are applied by QC Direct unless otherwise instructed by the client:
For Critical Defects AQL 0
For Major Defects AQL 1.0
For Minor Defects AQL 4.0