Pre-shipment inspection (also preshipment inspection or PSI) is a part of supply chain management and an important quality control method for checking the quality of goods clients buy from suppliers.
PSI helps ensure that production complies with the governing specification, contract, or purchase order. A final random inspection (FRI) checks finished products, often when at least 80% of an order has been produced and export-packed. Samples are selected at random, according to standards and procedures.
Re-shipment acceptance sampling, involving inspection, and acceptance testing, may be agreed upon between a buyer, a supplier, and a bank, and it can be used to initiate payment under a letter of credit. A PSI can be performed at different stages before shipment, such as checking the total amount of goods and packing, controlling the quality or consistency of goods, checking of all documentation, as for example test reports, packaging list, or verification of compliance