V-Trust uses the ANSI/ASQ Z1.4-2008 (AQL) as its sampling standard and acceptable level of quality. This method is widely used to decide whether to accept a production lot without checking every single item. This standard now has equivalents in all national and international standardization organizations such as BS6001, ABC105, ANSI/ASQ Z1.4, NFX 06-022, ISO 2859 and DIN 40080.

It offers the advantage of clearly defining the number of samples to be inspected from a given lot or consignment. It also suggests the maximum number of defective items allowed in the samples size unless specified by clients. Our default Acceptable Quality Level is Level II.