Examples of the Acceptable Quality Level (AQL)

Example
Single Sampling
Acceptable Quality Level60 %
Sample Size30 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%.

SampleSample QuantityResult
15 piecesGood
210 piecesBad
315 piecesGood

 

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.

Continuous Sampling
Acceptable Quality Level60 %
Order Quantity300 pieces
Frequency100 pieces
Sample size10 pieces

 

Sample noSample SizeActual Quality Level
110 pieces70 % bad
210 pieces50 % good
310 pieces80 % bad

 

Compare the results to the Acceptable Quality Level.

SampleQuality LevelQuantity
-ActualAcceptableAcceptedRejected
170 %60 %0100 pieces
250 %60 %100 pieces0
380 %60 %0100 pieces
--Total100 pieces200 pieces