Quality standard  
page 03  



High valued products

Low or medium valued products

Critical defectives

No critical defect is accepted

no critical defect is accepted

Major defectives

AQL 1.0

AQL 2.5

Minor defectives

AQL 2.5

AQL 4.0

Acceptable quality level (AQL) sample inspection methods have been proven to be accurate over a long run. However, the quality level of merchandise at destination is sometimes lower than the per-shipment inspection results. This may be due to transport, handling, change in environment and/or reliability problems. Buyers are therefore advised to take this into consideration when deciding the AQL levels.

Defect Classification
The client defines the AQL and the maximum number of defective goods allowed in the sample size.
Defects detected during visual inspection are usually classified within 3 categories: "Critical", "Major" and "Minor"

  • Critical: likely to result in unsafe condition or contravene mandatory regulation or reject by import customs.
  • Major: reduces the usability/function and/or sale of the product or is an obvious appearance defect
  • Minor: doesn't reduce the usability/function of the product, but is a defect beyond the defined quality standard more or less reduces the sale of the products.

An Individual with defect(s) is called defective sample. In the inspection process, one defective sample is counted one for the most serious defect only no matter how many defects found in the said sample.

Clients can specify what points are minor, major or critical in a defect classification checking-list together with the inspection criteria and product specification.



The below example illustrates the procedures for utilizing the single sampling plan.

Given:FM/AM auto scan radio

Batch size = 8,000 pcs.

Method: level II major 2.5 & minor 4.0

Sample size = 200 pieces

Acceptance number = 10 pcs of major & 14 pcs of minor.


That means either the major defects exceed 10 pcs or minor defects exceed 14 pcs or both are considered to be “Fail”.



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