Meaning
Statistical selection of production units from completed factory lots verifies product conformity prior to export dispatch. Executing pre-shipment sampling provides international buyers and Chinese regulatory bodies with representative test material for quality verification. Regulated under Chinese customs laws and ISO 2859 inspection standards, the procedure establishes acceptable quality limits for export clearance.
The protocol governs batch acceptance decisions, stopping at the boundary where destructive testing requires dedicated laboratory reserve samples.
Sampling Procedure
Qualified quality inspectors draw random samples across packaged export cartons according to predefined statistical tables. Sampling plans define sample size based on total lot quantity and agreed inspection levels. Technicians inspect selected units for visual defects and dimensional tolerances before issuing inspection certificates.
Sealing sampled cartons prevents product tampering prior to port delivery. Inadequate sample sizes skew quality statistical confidence, increasing the risk of batch rejections at destination ports.
Statutory Enforcement
Chinese customs officials conduct independent verification sampling on targeted export goods categories. Non-conforming test results trigger factory holds and mandatory safety investigations under export control laws. Third-party inspection agencies issue formal certificates required for letter of credit payment releases.
Operational Limit
Non-destructive sampling fails to detect internal structural flaws or subsurface chemical degradation. Laboratory destructive testing on representative units remains mandatory for critical load-bearing products.
