If there are 3 or less defects in the total sample, the lot will be accepted. If there are 4 or more defects in the total sample, the lot will be rejected. The other double sampling plans operate in a similar manner with the only differences being the sample sizes and acceptance and rejection numbers.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.15 Defects per Hundred Units
[Sampling plans-AQL = 0.15]
Comparable sampling plans | Identification number of OC curve | ||||||||||||||||||||||||||
R1 | R2 | R3 | R4 | N4 | N5 | N6 | N7 | N8 | |||||||||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 1 | 2 | 84 | 1 | 2 | 126 | 0 | 1 | 315 | 1 | 2 | 168 | 1 | 2 | 264 | 1 | 2 | 500 | 2 | 3 | 800 | 3 | 4 | 1,250 | 4 | 5 |
Double | 18 | 0 | 2 | 36 | 0 | 2 | 120 | 0 | 2 | 174 | 0 | 2 | 252 | 0 | 3 | 456 | 0 | 4 | |||||||||
36 | 1 | 2 | 96 | 1 | 2 | 180 | 1 | 2 | 336 | 1 | 2 | 540 | 2 | 3 | 864 | 3 | 4 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.15 Defects per Hundred Units
[Sampling plans-AQL = 0.15]
Comparable sampling plans | Identification number of OC curves | |||||||||||
1 | 2 | 3 | 4 | |||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 264 | 0 | 1 | 500 | 1 | 2 | 800 | 2 | 3 | 1,250 | 3 | 4 |
Double | 360 | 0 | 2 | 456 | 0 | 3 | 576 | 0 | 3 | |||
516 | 1 | 2 | 864 | 2 | 3 | 1,296 | 3 | 4 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.25 Defects per Hundred Units
[Sampling plans-AQL = 0.25]
Comparable sampling plans | Identification number OC curves | ||||||||||||||||||||
R1 | N2 | R3 | N and R4 | N and R5 | N6 | N7 | |||||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 1 | 2 | 84 | 0 | 1 | 84 | 1 | 2 | 168 | 1 | 2 | 315 | 2 | 3 | 500 | 3 | 4 | 800 | 4 | 5 |
Double | 18 | 0 | 2 | 36 | 0 | 2 | 120 | 0 | 2 | 168 | 0 | 3 | 228 | 0 | 3 | ||||||
18 | 1 | 2 | 96 | 1 | 2 | 180 | 1 | 2 | 348 | 2 | 3 | 516 | 3 | 4 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operation Characteristics (OC) Curves for AQL = 0.25 Defects per Hundred Units
[Sampling plans-AQL = 0.25]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 0 | 1 | 315 | 1 | 2 | 500 | 2 | 3 | 800 | 3 | 4 | 1,250 | 4 | 5 |
Double | 168 | 0 | 2 | 228 | 0 | 3 | 456 | 0 | 4 | ||||||
348 | 1 | 2 | 516 | 2 | 3 | 864 | 3 | 4 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.50 Defects per Hundred Units
[Sampling plans-AQL = 0.50]
Comparable sampling plans | Identification number of OC curves | |||||||||||||||||
R1 | N and R2 | N and R3 | N and R4 | N5 | N6 | |||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 1 | 2 | 84 | 1 | 2 | 168 | 2 | 3 | 315 | 3 | 4 | 500 | 5 | 6 | 800 | 7 | 8 |
Double | 18 | 0 | 2 | 36 | 0 | 2 | 120 | 0 | 3 | 168 | 0 | 4 | 228 | 0 | 5 | |||
36 | 1 | 2 | 96 | 1 | 2 | 180 | 2 | 3 | 348 | 3 | 4 | 516 | 5 | 6 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.50 Defects per Hundred Units
[Sampling plans-AQL = 0.50]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 1 | 2 | 315 | 2 | 3 | 500 | 3 | 4 | 800 | 4 | 5 | 1,250 | 6 | 7 |
Double | 120 | 0 | 2 | 168 | 0 | 3 | 228 | 0 | 3 | 456 | 1 | 5 | |||
180 | 1 | 2 | 348 | 2 | 3 | 516 | 3 | 4 | 864 | 4 | 5 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.00 Defects per Hundred Units
[Sampling plans-AQL = 1.00]
Comparable sampling plans | Identification number of OC curves | |||||||||||||||||
R1 | N and R2 | N and R3 | N and R4 | N5 | N6 | |||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 1 | 2 | 84 | 2 | 3 | 168 | 4 | 5 | 315 | 6 | 7 | 500 | 9 | 10 | 800 | 13 | 14 |
Double | 18 | 0 | 2 | 36 | 0 | 3 | 120 | 2 | 5 | 168 | 1 | 5 | 228 | 2 | 7 | |||
36 | 1 | 2 | 96 | 2 | 3 | 180 | 4 | 5 | 348 | 7 | 8 | 516 | 9 | 10 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.00 Defects per Hundred Units
[Sampling plans-AQL = 1.00]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 2 | 3 | 315 | 3 | 4 | 500 | 5 | 6 | 800 | 7 | 8 | 1,250 | 10 | 11 |
Double | 120 | 0 | 3 | 168 | 0 | 4 | 228 | 0 | 5 | 456 | 2 | 6 | |||
180 | 2 | 3 | 348 | 3 | 4 | 516 | 5 | 6 | 864 | 8 | 9 |
nc = Cumulative sample size Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.50 Defects per Hundred Units
[Sampling plans-AQL = 1.50]
Comparable sampling plans | Identification number of OC curves | |||||||||||||||||
R1 | N and R2 | N and R3 | N and R4 | N5 | N6 | |||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 1 | 2 | 84 | 3 | 4 | 168 | 5 | 6 | 315 | 8 | 9 | 500 | 12 | 13 | 800 | 18 | 19 |
Double | 18 | 0 | 2 | 36 | 0 | 4 | 120 | 2 | 6 | 168 | 2 | 7 | 228 | 3 | 9 | |||
36 | 1 | 2 | 96 | 3 | 4 | 180 | 5 | 6 | 348 | 9 | 10 | 516 | 12 | 13 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.50 Defects per Hundred Units
[Sampling plans-AQL = 1.50]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 4 | 5 | 315 | 6 | 7 | 500 | 9 | 10 | 800 | 13 | 14 | 1,250 | 19 | 20 |
Double | 120 | 2 | 5 | 168 | 1 | 5 | 228 | 2 | 7 | 456 | 5 | 10 | |||
180 | 4 | 5 | 348 | 7 | 8 | 516 | 9 | 10 | 864 | 14 | 15 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 2.50 Defects per Hundred Units
[Sampling plans-AQL = 2.50]
Comparable sampling plans | Identification number of OC curves | |||||||||||||||||
R1 | N and R2 | N and R3 | N and R4 | N5 | N6 | |||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 2 | 3 | 84 | 4 | 5 | 168 | 7 | 8 | 315 | 13 | 14 | 500 | 18 | 19 | 800 | 27 | 28 |
Double | 18 | 0 | 3 | 36 | 0 | 4 | 120 | 3 | 7 | 168 | 5 | 10 | 228 | 5 | 11 | |||
36 | 2 | 3 | 96 | 4 | 5 | 180 | 8 | 9 | 348 | 14 | 15 | 516 | 19 | 20 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 2.50 Defects per Hundred Units
[Sampling plans-AQL = 2.50]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 5 | 6 | 315 | 8 | 9 | 500 | 12 | 13 | 800 | 18 | 19 | 1,250 | 26 | 27 |
Double | 120 | 2 | 6 | 168 | 2 | 7 | 228 | 3 | 9 | 456 | 8 | 13 | |||
180 | 5 | 6 | 348 | 9 | 10 | 516 | 12 | 13 | 864 | 19 | 20 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 4.00 Defects per Hundred Units
[Sampling plans-AQL = 4.00]
Comparable sampling plans | Identification number of OC curves | |||||||||||||||||
R1 | N and R2 | N and R3 | N and R4 | N5 | N6 | |||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 3 | 4 | 84 | 6 | 7 | 168 | 11 | 12 | 315 | 19 | 20 | 500 | 28 | 29 | 800 | 42 | 43 |
Double | 18 | 1 | 3 | 36 | 0 | 5 | 120 | 6 | 10 | 168 | 7 | 13 | 228 | 8 | 17 | |||
36 | 4 | 5 | 96 | 7 | 8 | 180 | 12 | 13 | 348 | 21 | 22 | 516 | 29 | 30 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 4.00 Defects per Hundred Units
[Sampling plans-AQL = 4.00]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 7 | 8 | 315 | 13 | 14 | 500 | 18 | 19 | 800 | 27 | 28 | 1,250 | 41 | 42 |
Double | 120 | 3 | 7 | 168 | 5 | 10 | 228 | 5 | 11 | 456 | 12 | 19 | |||
180 | 8 | 9 | 348 | 14 | 15 | 516 | 19 | 20 | 864 | 29 | 30 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 2.50 Defects per Hundred Units
[Sampling plans-AQL = 6.50]
Comparable sampling plans | Identification number of OC curves | |||||||||||||||||
R1 | N and R2 | N and R3 | N and R4 | N5 | N6 | |||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 4 | 5 | 84 | 9 | 10 | 168 | 16 | 17 | 315 | 28 | 29 | 500 | 42 | 43 | 800 | 64 | 65 |
Double | 18 | 1 | 4 | 36 | 2 | 7 | 120 | 10 | 14 | 168 | 12 | 18 | 228 | 15 | 24 | |||
36 | 5 | 6 | 96 | 10 | 11 | 180 | 17 | 18 | 348 | 31 | 32 | 516 | 43 | 44 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 6.50 Defects per Hundred Units
[Sampling plans-AQL = 6.50]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 11 | 12 | 315 | 19 | 20 | 500 | 28 | 29 | 800 | 42 | 43 | 1,250 | 63 | 64 |
Double | 120 | 6 | 10 | 168 | 7 | 13 | 228 | 8 | 17 | 456 | 21 | 28 | |||
180 | 12 | 13 | 348 | 21 | 22 | 516 | 29 | 30 | 864 | 44 | 45 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Reduced and Normal Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 10.00 Defects per Hundred Units
[Sampling plans-AQL = 10.00]
Comparable sampling plans | Identification number of OC curves | |||||||||||||||||
R1 | N and R2 | N and R3 | N and R4 | N5 | N6 | |||||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 29 | 5 | 6 | 84 | 13 | 14 | 168 | 23 | 24 | 315 | 41 | 42 | 500 | 62 | 63 | 800 | 95 | 96 |
Double | 18 | 2 | 5 | 36 | 3 | 9 | 120 | 14 | 19 | 168 | 19 | 26 | 228 | 23 | 34 | |||
36 | 6 | 7 | 96 | 15 | 16 | 180 | 25 | 26 | 348 | 45 | 46 | 516 | 64 | 65 |
nc = Cumulative sample size. Ac = Acceptance number. Re = Rejection number.
Tightened Inspection Plans-Sampling Plans and Operating Characteristic (OC) Curves for AQL = 10.00 Defects per Hundred Units
[Sampling plans-AQL = 10.00]
Comparable sampling plans | Identification number of OC curves | ||||||||||||||
1 | 2 | 3 | 4 | 5 | |||||||||||
nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | nc | Ac | Re | |
Single | 168 | 16 | 17 | 315 | 28 | 29 | 500 | 42 | 43 | 800 | 64 | 65 | 1,250 | 96 | 97 |
Double | 120 | 10 | 14 | 168 | 12 | 18 | 228 | 15 | 24 | 456 | 32 | 41 | |||
180 | 17 | 18 | 348 | 31 | 32 | 516 | 43 | 44 | 864 | 69 | 70 |
nc = Cumulative sampling size. Ac = Acceptance number. Re = Rejection number.
7 C.F.R. §42.140