What a Pre-Shipment Inspection in China Actually Checks
18 September 2026 · Yzsource Sourcing Team
A pre-shipment inspection (PSI) is the last checkpoint before your money becomes freight. It does not create quality — that is the factory's job — but it converts vague hope into evidence, while there is still time to fix problems. Here is what it involves in practice.
When to book it
The common trigger is 100% of the order produced and at least 80% packed. Earlier than that, the sample is unrepresentative; later, defects discovered mean scrambling rather than correction. Book the date into the production schedule at order confirmation, not after production finishes — factories plan around it, and inspectors need lead time.
What the inspector actually does
Most PSIs follow the AQL sampling framework of ISO 2859-1 (the same statistical standard known in the US as ANSI/ASQ Z1.4). You do not check everything and you do not check three pieces — you draw a statistically defensible random sample, sized by your order quantity and your chosen acceptance quality limit (AQL 2.5 is a commonly used general level; sensitive products warrant stricter limits). On the sampled units the inspector typically checks:
- Quantity — actual carton count and units per carton against the packing list
- Workmanship — defects classified as critical, major or minor against the agreed standard
- Function and dimensions — testing against the written specification and the approved sample, not memory
- Assortment and marking — correct models, labels, barcodes, language requirements
- Packing — carton quality, inner boxes, dunnage, container loading supervision if booked
The report — and what happens after
You receive a photographic report with the sample drawn, defects found by classification, measurements, and a pass/fail against your AQL. If the result fails, the contract — not the inspector — determines what happens next: rework and re-inspection, sorting of defective units, price adjustment, or rejection. This is why the inspection standard belongs in the contract before production starts, alongside the specification.
A PSI typically costs a small fraction of one container's value, and it buys you the one thing a discount cannot: facts before the goods leave. If you buy from Hebei's clusters and want inspection handled locally, tell us the product and schedule — we will tell you what we can check and what is better left to a certified third party.