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Sample Size
Code Letter
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
Sample
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
First
Second
Sample Size
2
2
3
3
5
5
8
8
13
13
20
20
32
32
50
50
80
80
125
125
200
200
315
315
500
500
800
800
1250
1250
Cumulative
Sample Size
2
4
3
6
5
10
8
16
13
26
20
40
32
64
50
100
80
160
125
250
200
400
315
630
500
1000
800
1600
1250
2500
0
1
2
2
0
1
0
3
2
2
3
4
0
1
0
3
1
4
2
2
3
4
4
5
0
1
0
3
1
4
2
6
2
2
3
4
4
5
5
7
✸
0
✸
1
0 2 0
✸
1 2 3
0 2 0 3 1
✸
1 2 3 4 4
2
0
1
0
2
2
3
0
1
0
3
1
2
2
3
4
4
0
3
1
4
2
3
4
4
5
5
1
4
2
6
3
4
5
5
7
7
2
6
3
8
5
2 3 4 4 5 6 7 8 9 12
3 1 4 2 5 3 7 5 9 7
4 4 5 6 7 8 9 12 13 18
4 2 5 3 7 5 9 7 11 11
5 6 7 8 9 12 13 18 19 26
5 3 7 5 9 7 11 11 16
7 8 9 12 13 18 19 26 27
7 5 9 7 11 11 16
9 12 13 18 19 26 27
0
1
0
3
1
4
2
6
3
8
AQLs (reduced inspection)
0.010 0.015 0.025 0.040 0.065 0.10 0.15 0.25 0.40 0.65 1.0 1.5 2.5 4.0 6.5 10 15 25 40 65 100 150 250 400 650 1000
AcRe AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
AcRe
✸
✸
✸
✸
✸
✸
✸
✸
2
2
3
4
4
5
5
7
7
9
9
13
11
19
16
27
✸ + + + + + + + + +
0 2 0 3 1 4 2 5 3 7 5 9 7 11 11 16 17 22 25
✸
1 2 3 4 4 5 6 7 8 9 12 13 18 19 26 27 37 38 56
0 2 0 3 1 4 2 5 3 7 5 9 7 11 11 16 17 22 25 31
✸
1 2 3 4 4 5 6 7 8 9 12 13 18 19 26 27 37 38 56 57
0 2 0 3 1 4 2 5 3 7 5 9 7 11 11 16 17 22 25 31
1 2 3 4 4 5 6 7 8 9 12 13 18 19 26 27 37 38 56 57
0 2 0 3 1 4 2 5 3 7 5 9 7 11 11 16 17 22 25 31
1 2 3 4 4 5 6 7 8 9 12 13 18 19 26 27 37 38 56 57
2 0 3 1 4 2 5 3 7 5 9 7 11 11 16
2 3 4 4 5 6 7 8 9 12 13 18 19 26 27
3 1 4 2 5 3 7 5 9 7 11 11 16
4 4 5 6 7 8 9 12 13 18 19 26 27
4 2 5 3 7 5 9 7 11 11 16
5 6 7 8 9 12 13 18 19 26 27
5 3 7 5 9 7 11 11 16
7 8 9 12 13 18 19 26 27
7 5 9 7 11 11 16
9 12 13 18 19 26 27
9 7 11 11 16
13 18 19 26 27
11 11 16
19 26 27
16
27
0
1
0
3
1
4
2
6
3
8
5
12
7
18
11
26
31
57
396 Part V: Appendices
= Use first sampling plan below arrow. If sample size equals or exceeds lot or batch size, do 100 percent inspection.
= Use first sampling plan above arrow.
Ac = Acceptance number.
Re = Rejection number.
✸ = Use corresponding single sampling plan.
+ = Use corresponding single sampling plan or double sampling plan for code letter B.
Figure H.4
ANSI/ASQ Z1.4-2003 Table III- A: Double sampling plans for normal inspection.