Operating characteristic curves from ISO 2859–1: 1999 for the lot size range of 35,001–500,000 for various sampling options (AQL, inspection level).

For each AQL / inspection level provided in the figure, the respective number of samples and accept/reject ratio is listed as follows for single sampling plans at normal inspection: (1) 0.65, S-4, 80, 1/2 (green highlighted selected for use); (2) 0.65, S-3, 20, 0/1; (3) 0.40, S-4, 125, 1/2; (4) 0.40, S-3, 32, 0/1; (5) 0.25, S-4, 50, 0/1; (6) 0.15, S-4, 80, 0/1). Operating characteristic curve data in ISO-2859-1: 1999 is provided as expected percentage of lots to be accepted (%A) but presented here as an expected percentage of lots rejected (%R = 100 - %A) to visually correlate increases in percent non-conformity with increases in lot rejection.