PSI (Pre-Shipment Inspection)
An inspection of finished, packed goods before they leave the factory, used to confirm quality and quantity before the buyer pays the balance.
TL;DR: A PSI is a check of finished goods carried out before shipment, usually when production is complete and most goods are packed. It lets the buyer find problems while the goods are still at the factory.
A typical PSI covers quantity, appearance and workmanship, dimensions, function if relevant, labeling, packaging, and Shipping Marks. The inspector selects a random sample using a plan based on AQL (Acceptable Quality Limit), compares it with the specifications and the approved PPS (Pre-Production Sample), and issues a report with photos and a pass, fail, or pending result.
PSI timing matters. Many buyers link it to the Deposit and Balance Payment structure, paying the balance only after the inspection passes. This gives the buyer leverage to have defects fixed before the goods are loaded. Once cargo has shipped, fixing problems becomes slow and expensive.
A PSI can be done by the buyer’s own staff, a sourcing agent, or a Third-Party Inspection company. Some importing countries also require a government-mandated PSI or certificate of conformity for certain goods, which is a separate requirement.
For custom glass mosaic murals, a useful PSI checks color against the approved sample, confirms that every sheet is present and numbered to the layout, checks for chipped or loose tiles, and reviews carton and crate packing. Book the inspection a few days in advance and share your specifications and sample photos with the inspector.