| Lot size | Level I: n / Ac / Re | Level II: n / Ac / Re | Level III: n / Ac / Re |
|---|---|---|---|
| 2 – 8 | 100 % | 100 % | 100 % |
| 9 – 15 | 100 % | 100 % | 100 % |
| 16 – 25 | 100 % | 100 % | 100 % |
| 26 – 50 | 20 / 0 / 1 | 20 / 0 / 1 | 20 / 0 / 1 |
| 51 – 90 | 20 / 0 / 1 | 20 / 0 / 1 | 20 / 0 / 1 |
| 91 – 150 | 20 / 0 / 1 | 20 / 0 / 1 | 20 / 0 / 1 |
| 151 – 280 | 20 / 0 / 1 | 20 / 0 / 1 | 80 / 1 / 2 |
| 281 – 500 | 20 / 0 / 1 | 80 / 1 / 2 | 80 / 1 / 2 |
| 501 – 1,200 | 20 / 0 / 1 | 80 / 1 / 2 | 125 / 2 / 3 |
| 1,201 – 3,200 | 80 / 1 / 2 | 125 / 2 / 3 | 200 / 3 / 4 |
| 3,201 – 10,000 | 80 / 1 / 2 | 200 / 3 / 4 | 315 / 5 / 6 |
| 10,001 – 35,000 | 125 / 2 / 3 | 315 / 5 / 6 | 500 / 7 / 8 |
| 35,001 – 150,000 | 200 / 3 / 4 | 500 / 7 / 8 | 800 / 10 / 11 |
| 150,001 – 500,000 | 315 / 5 / 6 | 800 / 10 / 11 | 1250 / 14 / 15 |
| 500,001 and over | 500 / 7 / 8 | 1250 / 14 / 15 | 2000 / 21 / 22 |
n = sample size, Ac = accept if this many or fewer nonconforming units are found, Re = reject if this many or more are found. Where the sample is larger than the lot, the whole lot is inspected. Arrows of the standard table are already resolved. Always check plans for contractual use against the current edition of ISO 2859-1.
Other AQL values
AQL 0.065AQL 0.1AQL 0.15AQL 0.25AQL 0.4AQL 1AQL 1.5AQL 2.5AQL 4AQL 6.5AQL 10
Learn how to read the OC curve in the AQL guide.
Frequently asked questions
What does AQL 0.65 mean?
AQL 0.65 % is the worst average percentage of nonconforming units that is still considered acceptable. Lots at that quality level are accepted most of the time (typically about 95 %); worse lots are rejected more often, as the OC curve of each plan shows.