Pre-Shipment Inspection (PSI), also known as Final Random Inspection, is the most common inspection type to confirm the whole shipment’s quality level. It normally requires the production to be completed and at least 80% of goods packed into cartons.

The inspected samples are selected at random, according to international standards and procedures. V-Trust uses ANSI/ASQ Z1.4-2008 (AQL) as its sampling standard and acceptable level of quality.