With the development of foreign trade in recent years, many international clients ask China inspection services to help them inspect their goods in China, which is cost saved and convenient.
But, actually, honestly, when they get a very detailed inspection report, some people do n’t know anything about the AQL result in the inspection report, they are a little vague about what the AQL result represents, and they do n’t know how to use it.
What is AQL? How is the AQL result should be read?
The AQL standard takes into account the probability of having this defect on the whole batch of goods only. Its purpose is to provide information about the defects available compared to the acceptance quality limits of reference. AQL results are very useful for identifying major defects in production. However, it remains a probability.
It is natural for many people to calculate the percentage of defects over the sample size and then estimate the number of defective goods on the whole lot. But it’s not correct. For example: on a 1000 Pcs order, if we take a sample size of 100 pcs and found 30 pcs are defective, it does not mean that there will be in a total of 30 defective pieces on the total order. The only way to know the total defective quantity is to check the total order quantity.
How should we read the AQL Result?
First, you should analyze each defect; pay attention to each classification of defects because there is always the probability that the number of defects on the overall order could be higher or lower than the AQL result.
Second, ask yourself: Is it acceptable for you if present in a higher quantity on the total order? If not, you should ask your supplier to improve the quality of their products.
Also, in an inspection report, the inspector will report some defects separately on the comment if these defects appear on too many samples (>10%-20 % of the sample size in general). We usually call these defects “general defects” at the same time. It can be a minor defect, the same time; it can be a major defect. In any case, you should pay close attention to these defects, because it is likely to be present in a high percentage on the whole batch of goods.
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