Sampling Strategy
Quality inspection of finished linen fabric utilizes a statistical system to determine the number of rolls that must be evaluated from each production lot. Applying ISO 2859-1 acceptance sampling provides a structured plan that balances the cost of inspection against the risk of accepting a defective batch. The size of the sample is determined by the total lot size and the chosen inspection level.
This system ensures that the inspection process remains objective and standardized across different manufacturing batches.
Defect Classification
Inspection procedures classify yarn defects, fabric faults, and dyeing irregularities according to their severity. Under the rules of ISO 2859-1 acceptance sampling, the buyer and the mill agree on an acceptable quality limit for minor, major, and critical defects. Minor faults might include small oil stains, while major faults include large warp breaks that affect the structural integrity of the linen fabric.
These classifications are detailed in the mill’s quality manual.
Batch Acceptance
Decision rules for accepting or rejecting a lot are based on the number of defects found in the sample. If the number of defects exceeds the rejection threshold, the entire lot is held for sorting. This statistical boundary protects the buyer from receiving substandard linen fabric.
