Goods inspection sampling: batch range, inspection level, AQL value determines the number of samples and the number of qualified and unqualified products. Clothing quality inspection using a one-time sampling program, clothing batch qualified quality level (AQL) is 2.5, the level of inspection for the general level of inspection, the strictness of the inspection is normal inspection.
Normal Inspection One Sampling Program (AQL-2.5) AQL is the abbreviation of ----ACCEPT QUALITY LEVEL, an international standard.
1, AC = Acceptable number = Use the first value below the arrow = Use the first value above the arrow Sampling number is carried out at the General Inspection Class II inspection level.
2, AQL0.010----0.10 is to use electronic products, medical devices and other tests.
AQL1.0----6.5 is used for clothing, textiles and other tests.
It refers to a sampling parameter, generally used in mass production, the inspector sample sampling and test pass or fail the parameter table.
AQL theory
(AcceptanceQualityLimit, Acceptable Quality Level) is based on the statistical assumption that there is a bias in everything, such as the rate of surgical accidents can not be more than a few percent, the rate of misdelivery of postal mail can not be more than a few percent of the standard.
The AQL (Acceptable Quality Level) is the basis of the Adjusted Sampling System, and is the upper limit of the process average of consecutively submitted lots that can be accepted as agreed upon between the supplier and the demander***. The process average is the average quality of a series of consecutively submitted lots and is expressed as the "lot failure rate" or "defect rate per 100 units".
The relationship between AQL and sample size (can sample size be interpreted as "sample size"? Sample size should be interpreted as the size of the number of samples taken) is that a test level (the number of samples taken) is the average of the quality of a test lot. The relationship between AQL and sample size (is the so-called sample size understood as "sample size" or sample size?) lies in the conversion of a test level (I, II, III three general checking levels, as well as S-1, S-2, S-3, S-4 four special checking levels) and the degree of severity (severities).