Sampling inspection is a core term in foreign trade quality control, referring to the statistically based random selection of a certain number of samples from a batch of goods to be inspected, and based on the sample results, inferring whether the entire batch meets quality standards. Usage scenarios include: in-process inspection during production, final inspection before shipment, import inspection after arrival, etc., especially suitable for large-volume, destructive testing, or goods where full inspection costs are too high. Precautions: sampling standards (e.g., ISO 2859, GB/T 2828.1), inspection levels (General Inspection Levels I, II, III), AQL (Acceptable Quality Level), and acceptance rules must be clearly defined to avoid disputes caused by inconsistent sampling plans. The difference from '100% Inspection' is that sampling inspection guarantees quality probabilistically, with the risk of accepting a nonconforming lot (α) and the risk of rejecting a conforming lot (β); unlike 'exemption from inspection', sampling inspection still requires inspection procedures. In foreign trade contracts, the sampling method, inspection agency, and handling of nonconformities should be stipulated to protect both parties' interests.
📝 Examples
1. According to the contract, we will entrust SGS to conduct sampling inspection on this batch of 10,000 garments, using AQL 2.5 and General Inspection Level II. If the number of nonconforming items exceeds the allowable value, the entire batch will be rejected. (Note: Clarifies sampling standards and acceptance rules, used for final shipment inspection.)
2. The importer requires sampling inspection on the 20 tons of coffee beans arriving at the port to verify whether moisture and impurity content comply with the letter of credit, with a sampling ratio of 100 grams randomly taken from each bag. (Note: Demonstrates the actual operation of sampling inspection after arrival to ensure quality consistency with documents.)
💡 Foreign Trade Tips
Foreign trade terms are the foundation of international business communication
Trade practices may vary slightly by country; pay attention when using them
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