1. AQL TABLE (Single sampling plan for normal inspection):
QCINASIA uses well-proven and widely adopted international standard ANSI/ASQC Z1.4-2003 (equivalent to MIL STD 105E, ISO 2859, NF06-022, BS6001, DIN40080, GB2828) to inspect a randomly selected number of products.
Table A:
Table B:
As default, QCINASIA uses general inspection level II, Acceptable Quality Level (AQL) Not allowed / 2.5 / 4.0 of Critical, Major, Minor defect.
For example, there're 6,000 units to be inspected. As per single sampling level II, AQL: Not allowed / 2.5 / 4.0 of Critical / Major / Minor:
According to table A, from quantity 3201 to 10000, the corresponding sample size code letter is "L", therefore in table B, “L” is corresponding to sample size "200". So the maximum allowed number of defective unit is as follow:
Critical Defect 0; Major Defect 10; Minor Defect: 14.
In other words, if the number of critical defective units is more than 0, or major defective units is more than 10, or minor defective units is more than 14, the lot has to be rejected.
2. Defect Classifications:
The defect classifications can be specified by client, otherwise, generally, QCINASIA define the defects as below:
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
Function defects which could reduce the usability or solidity of the product as well as obvious visual defects reducing the sale value of the product.
Minor
Defects which are unlikely to reduce the use of the product, but nevertheless may influence the sale.
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