AQL calculation tables

The Acceptable Quality Level is intended to assess the quality of a product. To determine the AQL, it is necessary to calculate:

the sampling code,
the AQL value.

Determining the sample size

Maximum number of parts contained in the initial lot	Sampling code	Size of the sample for a simple sampling plan
8	A	2
15	B	3
25	C	5
50	D	8
90	E	13
150	F	20
280	G	32
500	H	50
1200	J	80
3200	K	125
10000	L	200
35000	M	315
150000	N	500
500000	P	800
9999999999	Q	1250

Determining the acceptance and rejection parameters (parameter A)

AQL	Sampling code	A
1.0	A	0
1.0	B	0
1.0	C	0
1.0	D	0
1.0	E	0
1.0	F	0
1.0	G	1
1.0	H	1
1.0	J	2
1.0	K	3
1.0	L	5
1.0	M	7
1.0	N	10
1.0	P	14
1.0	Q	21
1.5	A	0
1.5	B	0
1.5	C	0
1.5	D	0
1.5	E	0
1.5	F	1
1.5	G	1
1.5	H	2
1.5	J	3
1.5	K	5
1.5	L	7
1.5	M	10
1.5	N	14
1.5	P	21
1.5	Q	21
2.5	A	0
2.5	B	0
2.5	C	0
2.5	D	0
2.5	E	1
2.5	F	1
2.5	G	2
2.5	H	3
2.5	J	5
2.5	K	7
2.5	L	10
2.5	M	14
2.5	N	21
2.5	P	21
2.5	Q	21
4.0	A	0
4.0	B	0
4.0	C	0
4.0	D	1
4.0	E	1
4.0	F	2
4.0	G	3
4.0	H	5
4.0	J	7
4.0	K	10
4.0	L	14
4.0	M	21
4.0	N	21
4.0	P	21
4.0	Q	21
6.5	A	0
6.5	B	0
6.5	C	1
6.5	D	1
6.5	E	2
6.5	F	3
6.5	G	5
6.5	H	7
6.5	J	10
6.5	K	14
6.5	L	21
6.5	M	21
6.5	N	21
6.5	P	21
6.5	Q	21
10	A	1
10	B	1
10	C	1
10	D	2
10	E	3
10	F	5
10	G	7
10	H	10
10	J	14
10	K	21
10	L	21
10	M	21
10	N	21
10	P	21
10	Q	21
15	A	1
15	B	1
15	C	2
15	D	3
15	E	5
15	F	7
15	G	10
15	H	14
15	J	21
15	K	21
15	L	21
15	M	21
15	N	21
15	P	21
15	Q	21
25	A	1
25	B	2
25	C	3
25	D	5
25	E	7
25	F	10
25	G	14
25	H	21
25	J	21
25	K	21
25	L	21
25	M	21
25	N	21
25	P	21
25	Q	21
40	A	2
40	B	3
40	C	5
40	D	7
40	E	10
40	F	14
40	G	21
40	H	21
40	J	21
40	K	21
40	L	21
40	M	21
40	N	21
40	P	21
40	Q	21
65	A	3
65	B	5
65	C	7
65	D	10
65	E	14
65	F	21
65	G	21
65	H	21
65	J	21
65	K	21
65	L	21
65	M	21
65	N	21
65	P	21
65	Q	21
100	A	5
100	B	7
100	C	10
100	D	14
100	E	21
100	F	21
100	G	21
100	H	21
100	J	21
100	K	21
100	L	21
100	M	21
100	N	21
100	P	21
100	Q	21

Example:
Let us consider an inittial lot of 100 parts and an AQL equal to 25: the sampling code is F and the sampling size contains 20 parts.
As a consequence, the acceptance criterion is 1:
- if the number of non-complying parts is less than or equal to 1, the sample is accepted.
- if the number of non-complying parts is greater than or equal to 2, the sample is rejected.