What is the inspection standard of AQL, what is the standard of AQL 1 0

AQL standards are ,,,AQL10, AQL15, AQL25, AQL40, AQL65, AQL100, AQL150, AQL250, AQL400, AQL650, AQL1000. Different AQL standards are applied to the testing of different substances. In AQL sampling, the same number is extracted, and the smaller the value followed by AQL, the lower the number of defects allowed, indicating that the higher the quality requirements and the stricter the inspection.

AQL: Acceptable Quality Limit is an abbreviation for acceptable quality limit, which is the worst allowable average quality level of process when a continuous series of batches is submitted for acceptance.

AQL is widely used in export garment, textile inspection, AQL standards are,,,AQL10, AQL15, AQL25, AQL40, AQL65, AQL100, AQL150, AQL250, AQL400, AQL650, AQL1000. Different AQL standards are applied to the testing of different substances. In AQL sampling, the same number is extracted, and the smaller the value followed by AQL, the lower the number of defects allowed, indicating that the higher the quality requirements and the stricter the inspection.

Here's a list of the different AQLs:

During the inspection, the number of samples and the number of qualified and unqualified products are determined according to the batch range, inspection level, and AQL value. The garment quality inspection adopts a sampling scheme, the qualified quality level (AQL) of the garment batch is, the inspection level is the general inspection level, and the strictness of the inspection is the normal inspection.

The sampling scheme is shown in the table

Normally check the one-time sampling scheme (AQL is the abbreviation of --- accept quality level, which is 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 is carried out at the level of general inspection level II.

2) It is used for inspection of electronic products, medical equipment, etc.

It is used for garment, textile inspection, etc.

It refers to a sampling parameter, which is generally used for mass production, and the inspector samples are sampled and inspected to pass or not.

Note: When the number of orders is the number of random checks, the order quantity is regarded as the number of random checks, and the judgment array [ac,re] of the sampling scheme remains unchanged

ac - accept (the number of qualified judgments);

re——rcject (number of failed judgments).

Example 1: The number of orders for a batch of clothing is 3,000 pieces, and 125 pieces are randomly inspected according to the standard, and the number of defective products is 7 on the pass (pass), and the number of defective products is 8 on the fail (unqualified).

Example 2: The number of orders is 7 pieces, 5 pieces are randomly checked according to the standard, no defective products are passed, and one defective product is fail; If it is in accordance with the standard, only 3 pieces will be randomly checked, and no defective products will be passed

Spot check checklist (GB2828-87).

Number of orders The number of pieces to be inspected.

ac re ac re

Summary. AQL = requires that the maximum non-conforming product rate on the basis of continuous and stable production does not exceed it, and AQL = cannot be expressed simply by the pass rate. There is a correspondence between them.

AQL = to change the door to the production on the basis of continuous and stable production of the most hall of the large non-conforming product rate does not exceed, AQL = not pretending to be a mu can be simply expressed by the pass rate. There is a correspondence between them.

Hope it helps, dear.

What is the sampling standard?

AQL is not an inspection standard but a parameter basis for inspection.

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On what basis.

This judgment is first based on the customer's criteria, and secondly, the classification of defects is as follows: Serious Defect (CR): Defects that affect the personal safety of the user and cause danger, which are called serious defects; Major Defect (MA):

The lack of wisdom that affects the use of the product is called a major defect; Minor Defect (MI): Defect that does not affect the function of the product, which is called a minor defect; The allowable number of defects should be implemented in accordance with the AQL acceptance criteria provided by the customer.

Hope it helps, dear.

<> AQL sampling steps:

Looking at the inspection criteria, a complete inspection item should contain 3 elements: batch number, inspection level, and AQL value.

For example, if the batch number of a certain inspection item is 20, according to the general inspection level II, the AQL value is pressed respectively.

1. Before talking first, according to the number of batches and the test level, check the sample size word code, 20 according to the general test level II, and the corresponding sample size word code is C.

3. Then how to select the sampling scheme when looking at the AQL value.

Look at the sampling scheme table and find the sample size code "C" on the left, and the Received Quality Limit (AQL) 2" above, as shown in the red circle. If the intersection of the two is found to contain Senqing, and the intersection point is "0 1" (shown in the blue circle), then the sample size of the sampling is the corresponding sample size of the bank "5" (shown in the blue circle in the header).

Therefore, the batch of 20 pieces, according to the general inspection level II, AQL value, the sampling scheme is: 5 samples, 0 receive and 1 reject.

4. Let's look at the sampling scheme at AQL value.

Similarly, find the "c" on the left and the top ", find the intersection of the two, and find that the intersection is a downward arrow!

It's different here, please see ** The following remarks: The down arrow indicates "use the first sampling scheme below the arrow". Follow the arrow to find the first number "0 1" (circled in blue) and move on to the next step.

5. Look at the number "0 1" to the left and find the sample size "13" (blue circle), which is the sampling number of this sampling scheme.

Therefore, when the batch of 20 pieces, according to the general inspection level II and AQL value, the sampling scheme is: 13 samples, 0 spring suspicions and 1 rejection.

6. Finally, let's look at the sampling scheme when the AQL value is timely.

See **Note below: If the sample size is equal to or exceeds the batch, then perform a 100% test.

Therefore, in batches of 20, according to the general inspection level II, when the AQL value is used, the sampling scheme is: 20 are fully inspected, 0 receive and 1 reject.

1. If the inspection is destructive to the product, the AQL sampling inspection method is used.

2. If the measurement object is a process material, the AQL sampling test method is used.

3. If you want to save the cost and time of unit inspection, use AQL sampling inspection method.

Methods for determining AQL:

1. Engineering method: The engineering method is based on the performance, life, interchangeability, assembly, safety and other quality requirements of the product, and the quality that must be guaranteed technically is AQL.

3. Empirical method: AQL is agreed upon by the responsible department personnel, engineering and technical personnel, and quality management personnel according to the experience of process capacity.

4. Experimental method: The experimental method is to temporarily specify an AQL value without any bright information to refer to, and then adjust the AQL in a circular line according to the relevant quality information obtained in the process of use.

The AQL Sampling Test Criteria Table is the average quality level of the worst allowable process when a continuous series of batches is submitted for acceptance. AQL is widely used in the quality inspection of products in various industries, and different AQL standards are applied to the inspection of different substances.

In AQL sampling, the number of infiltration extracted is the same, and the smaller the value followed by AQL, the smaller the number of defects allowed, indicating that the higher the quality requirements, the more stringent the inspection.

Some principles that should be followed when determining an AQL:

1. The AQL value is a satisfactory process average quality, and it is expected that the average batch quality of the supplier will not exceed this value.

2. Consider the use of the product and the consequences caused by the failure of the product. For example, the AQL value of the same specification of electronic components can be larger when used in general civilian equipment than in military equipment; The AQL value can be larger when used for ordinary instruments than for precision instruments.

3. Although AQL is not a requirement for the quality of individual batches, if it is indeed known that the number of unqualified products per 100 units of a certain batch of products (or the number of unqualified products per 100 units) does not exceed the specified AQL value, the batch should be accepted; Otherwise, the batch should be rejected.

4. From the user's consideration, the AQL value cannot be required to be too small, otherwise, the inspection fee and product cost will increase, or the product batch is often rejected, so that the supplier refuses to sign the contract.

5. If the quality of the producer is difficult to improve the product urgently needed by the user, in order to get the product, the AQL value has to be selected to be appropriately larger, and the AQL value will be adjusted after the quality of the producer is improved.

6. When there are many spare parts, and the unqualified parts are easy to find and replaced with qualified parts when assembled as a whole, AQL can be selected larger; If a part cannot be removed from the whole part and replaced after failure, so that the whole part fails, AQL should be smaller.

7. From the perspective of assembly sequence, if the unqualified products of the previous process will cause a waste of time and material resources to the latter process, the AQL value of the previous process should be smaller than the AQL value of the latter process.