AQL Standard (Single sampling plan for normal inspection)
BNS uses well-proven and widely adopted international standard ANSI/ASQC Z1.4 (ISO2859-1) Single Sampling Plan. General Inspection Level Normal II is usually applied to determine the inspection sample size for aesthetic and functional check. Special Inspection Level will be applied for safety, reliability, performance or other special test if whereas applicable.
The number of sample unit inspected shall be equal to the sample size given by the plan. If the number of non-conforming units found in the sample is equal to or less than the acceptable number, the lot or batch shall be considered acceptable. If the number of nonconforming units is equal to or greater than the rejection number, the lot or batch shall be considered not acceptable.
AQL Table A:
AQL Table B:
Defects Classification Criteria
Defects detected during inspection are classified within 3 categories -"Critical", " Major ", " Minor "and the normal definitions are:
Critical: Defects which could result in hazardous or unsafe conditions for individuals using or maintaining the product as well as defects contravening legal regulations.
Major: Functional defects reducing the usability or solidity of the product as well as obvious visual defects reducing the sales value of the product.
Minor: Defects that are unlikely to reduce the use of the product, but nevertheless may influence the sale.
For random inspection, the following rules are applied: If the same sample has several defects, only the most serious defect is counted. In the case of critical defects, the entire shipment must be rejected as a matter of principle and clients consulted for a decision.