Examples of the Acceptable Quality Level (AQL)

Example

Acceptable Quality Level 60 %
Sample Size 30 pieces

AQL 60 % means that 60% of the sample can be defective and the sample would be rejected only if the rejected piece is more than 60%.

Sample Sample Quantity Result
1 5 pieces Good
2 10 pieces Bad
3 15 pieces Good

Actual Quality Level = [ 10 / (5+10+15 ) ] x 100% = 33.33 %

The actual defective level is much lesser than the Acceptable Quality level. Consequently, the order quantity or the sample is accepted.

Acceptable Quality Level 60 %
Order Quantity 300 pieces
Frequency 100 pieces
Sample size 10 pieces
Sample no Sample Size Actual Quality Level
1 10 pieces 70 % bad
2 10 pieces 50 % good
3 10 pieces 80 % bad

Compare the results to the Acceptable Quality Level.

Sample Quality Level Quantity
- Actual Acceptable Accepted Rejected
1 70 % 60 % 0 100 pieces
2 50 % 60 % 100 pieces 0
3 80 % 60 % 0 100 pieces
- - Total 100 pieces 200 pieces