AQL :
ACCEPTABLE QUALITY LIMIT Abbreviation for Acceptable Quality Limit, i.e., the worst allowable process average quality level when a continuous series of lots is submitted for acceptance. AQL1.5, AQL2.5, AQL4.0, AQL6.5, AQL10, AQL15, AQL25, AQL40, AQL65, AQL100, AQL150, AQL250, AQL400, AQL650, AQL1000 Different AQL standards are used for different substances. In AQL sampling, the number of samples taken is the same, and the smaller the value following the AQL, the smaller the number of defects allowed, which means that the quality requirements are higher and the inspection is relatively more stringent. The following is a list of different AQL's:
The inspection of goods is based on: the batch range, the level of inspection, the AQL value to determine the number of samples taken and the number of qualified and unqualified products. Clothing quality inspection using a sampling program, clothing batch of qualified quality level (AQL) of 2.5, the level of inspection for the general level of inspection, inspection of the strictness of the normal inspection. Its sampling program is shown in the table:
Normal inspection of a sampling program (AQL-2.5) AQL is ----ACCEPT QUALITY LEVEL is the abbreviation of an international standard, 1 ) AC = Acceptable number = use the first value below the arrow = use the first value above the arrow
The number of samples are performed at the General Inspection Class II inspection level.
2 ) AQL0.010----0. 10 is used for electronic products, medical devices, etc.
AQL1.0----6.5 is used for clothing, textiles, etc.
It refers to a sampling parameter, which is generally used for mass production, the inspector samples sampling and inspection of the parameter table of the passing or failing
Instructions: When the order quantity ≤ sampling number of pieces When the number of ≤ sampling number of pieces, the number of orders will be considered as the number of sampling pieces, the sampling program of the judgment array [Ac, Re] remains unchanged:
Ac - Accept (qualified judgment number);
Re-- Rcject (number of failing decisions).
Example 1: There is a batch of clothing order is 3000 pieces, according to the AQL2.5 standard sampling 125 pieces, the number of defective ≤ 7 on the PASS (pass), the number of defective ≥ 8 on the FAIL (failed).
Example two: the number of orders for 7 pieces, according to AQL2.5 standard sampling 5 pieces, no defective PASS, there is a defective FAIL; if in accordance with the AQL4.0 standard is only sampling 3 pieces, no defective PASS
AQL2.5/4.0 Sampling and Inspection Table (GB2828-87)
Order number of pieces sampling
AQL2.5 AQL4.0
Ac Re AC RE
2-8 3 0 1
5 0 1
9-15 3 0 1
5 0 1
16-25 5 0 1 <
13 0 1
26-50 5 0 1
13 1 2
51-90 13 1 2
20 1 2
91-150 20 1 2 2 3
151
280 32 2 3 3 4
281-500 50 3 4 5 6
501-1200 80 5 6 7 8
1201-3200 125 7 8 10 11
3201-10000 200 10 11
3201-10000 200 10 11 14 15
10001-35000 315 14 15 21 22