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         East Inspection use well-proven and widely adopted international standard MIL STD 105E, which is equivalent to ANSI/ASQC Z1.4, ISO 2859, NF06-022, BS6001, DIN40080, GB2828, to inspect a randomly selected number of products. As illustrated below:
 
Table1
Table2
As default, EastInspection uses general inspection level II, special inspection level S1, Acceptable Quality Level (AQL) 0/2.5/4.0 of critical, major, minor defect.

For example, we have a lot of 4,000 units to inspect. According to table 1, "L" is right sample size code for general inspection level II. Therefore in table 2, we pick "200" as L's corresponding sample size. So the allowed maximum number of defective unit is as follows:
Critical Defect 0; Major Defect 10; Minor Defect: 14.

In other words, if the number of critical defective units is more than 0, or major defective units is more than 10, or minor defective units is more than 14, the lot has to be rejected.


Defect classification

, Critical defect
The "Critical Defect" corresponds to a defect likely to result in unsafe conditions for end-users or specifically requested by customers.

, Major defect
The "Major Defect" corresponds to a defect at the function, or to reduce the usability of the unit of product for its intended purpose.

, Minor defect
The "Minor Defect" corresponds to a defect that is not likely to reduce the usability of the unit of product for its intended purpose, or is a departure from established standards having little bearing on the effective use or operation of the unit.
 
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