AQL Sampling Calculator

Quantity

Inspection Level

Critical AQL

Major AQL

Minor AQL

Sample Size: 0 units

Critical

Accept: 0 Reject: 0

Major

Accept: 0 Reject: 0

Minor

Accept: 0 Reject: 0

I. Select the total shipment quantity (lot size).
II. Choose an inspection level, typically General Level II.
III. Set the AQL values for critical, major, and minor defects. Common defaults are 0 / 2.5 / 4.0.

The AQL sampling tables determine sample sizes and acceptance/rejection numbers based on the lot size, inspection level, and selected AQL values.

Find the lot size and inspection level to identify the sample size code letter on the left side of the table.
Use the code letter to find the corresponding sample size in the middle of the table.
Locate the selected AQL value to find the acceptance number (Ac) and rejection number (Re) on the right of the table.

Ac (Acceptance Number): The maximum number of defective units allowed in the sample for acceptance.

Re (Rejection Number): The minimum number of defective units that results in rejection under the selected sampling plan.