Quality Protocol
Statistical criteria for product inspection determine the number of items drawn from a production batch to evaluate overall quality. Implementing iso 2859-1 lot sampling allows garment inspectors to make clear decisions about accepting or rejecting a whole cargo based on the number of defects found in a smaller test group. This standard applies to discrete finished units of apparel, rather than continuous fabric rolls or raw fiber bales.
It gives brands and mills a shared mathematical language to settle disputes about batch quality.
Inspection Level
The plan defines several inspection levels that adjust the sample size based on the historical performance of the factory. For a new supplier, a tighter inspection level is chosen to verify that quality remains high. Once a factory proves its reliability, the buyer can switch to normal or reduced sampling to save time.
Acceptable Boundary
The tables within the standard use an acceptable quality limit to set the maximum allowed number of defective garments in the sample. If the count of major defects exceeds this number, the entire shipment is rejected. This clear boundary prevents arguments between the factory and the buyer.
Risk Balance
Using statistical sampling balances the cost of checking thousands of garments against the risk of shipping poor quality goods. This balance keeps shipping costs predictable.
