AQL stands for ACCEPTANCE QUALITY LEVEL, which is the abbreviation of acceptance quality limit, that is, the average quality level of the worst process that can be allowed when a continuous batch is submitted for acceptance.

AQL is widely used in the inspection of export clothing and textiles, and different AQL standards are used for the inspection of different substances. In AQL sampling, the number of samples is the same. The smaller the value after AQL, the fewer defects are allowed, indicating that the higher the quality requirements, the stricter the inspection.

AQLL sampling inspection:

Judgment: Sampling inspection is to inspect and judge the product or process by using the sampled samples.

Sampling inspection is applicable to:

1, the inspection is destructive to the product;

2. The measured object is process material;

3. I hope to save the cost and time of unit inspection.

Sampling scheme:

The number of unit products (sample size or series sample size) to be inspected in each batch and a specific batch acceptance standard scheme (including the number of products received, the number of unqualified products, the decision rules, etc.). ) is specified.

sampling method

1, simple random sampling method; Everyone has the same chance, similar to the familiar lottery.

2. Systematic random sampling method; (equidistant or mechanical)

3. Stratified sampling method; (Simple random sampling is conducted according to product characteristics, such as: safety, serious and extremely serious sampling is divided into three times)

4. Grouping sampling method. (grouping)