QS9000 clause 4.10.4.2 Final Product Audit states
"The supplier shall conduct audits of packaged final product to verify conformance to all specified requirements (e.g. product packaging, labeling) at an appropriate frequency). Note: This activity, also known as a "dock audit", is based upon sampling and is generally performed after final inspection but prior to shipment." Where customer PPM requirements are net, the frequency of Final Product Audits may be reduced.