The ANSI/AAQC Z1.4-1993 (former MIL-STD-105E) statistical sampling procedure, or a similar standard, is normally used. A complete pre-shipment inspection program consists of:

Pre-Production Checks (PPC)
Material, components, labels, user manual, etc. are checked before processing in order to reduce the risk that production is jeopardized by insufficient or substandard supplier available.

Initial Production Check (IPC)
IPC is a service that enables to ascertain conformity to basic product specification. The inspection minimum requirement is that at least 10% of the articles have been produced.

During Production Check (DUPRO)
DUPRO is a service that enables to ascertain the initial discrepancies have been rectified and to check the average workmanship quality. The inspection minimum requirement is that at least 30% to 50% of the articles have been produced.

Final Random Inspection (FRI)
FRI is a service that enables to ascertain the quality, quantity, and packaging of the purchase order. The inspection minimum requirements are that 100% of the articles have been produced and at least 80% of the articles in finally packed.

Loading Supervision (L/S)
This intervention can be added to ensure that the goods checked at the Final Random Inspection are those being shipped. Containers are inspected for cleanliness and suitability, and also to ensure that the lot being shipped is suitably packed and in its entirety. Finally, containers are secured with seals after loading.

Re-Inspection
Too often, consignments which failed the first inspection, but passed re-inspection, remain of unsatisfactory quality and lead to complains. It is therefore crucial to check specifically whether manufactures have actually improved / resorted the consignment after the initial failed inspection.