| |
First of all, let me
start by saying that I am NOT a mathematician. I have absolutely
no clue how to develop statistical analysis calculations. The fact
of the matter is that I am not even certain what association originally
developed the AQL standards. Over the past numerous years, I have
seen many charts floating around the fashion industry explaining how to
utilize AQL for inspecting garment production. What I have
attempted to do is take the previously existing charts, and compile the
date in a slightly different format to make the chart easier to read.
In doing such, I have removed much of the table that I believe is not
necessarily directly relevant to the apparel industry. Note:
Please use this chart and method illustrated at your own risk.
Industry standards may have changed. This is simply a guide that
you may wish to follow. If you are doing inspections for a
specific company, we suggest you contact them for the exact
requirements.
How to Use This AQL Chart
|
Acceptable Quality Levels |
|
AQL Chart |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Single Sampling Plans for Normal Inspection |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
Apparel Search 2008 : ApparelSearch.com |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
AQL's in Percent Nonconforming Items and Nonconformities
per 100 items (normal inspection) |
|
Sample Size Code Letter |
Sample Size(number
of samples) |
|
|
|
2.5 AQL |
|
|
Acceptable |
Rejected |
|
|
A |
2 |
|
|
|
|
B |
3 |
|
|
|
|
C |
5 |
0 |
1 |
|
|
D |
8 |
 |
|
|
|
E |
13 |
|
|
|
|
F |
20 |
1 |
2 |
|
|
G |
32 |
2 |
3 |
|
|
H |
50 |
3 |
4 |
|
|
J |
80 |
5 |
6 |
|
|
K |
125 |
7 |
8 |
|
|
L |
200 |
10 |
11 |
|
|
M |
315 |
14 |
15 |
|
|
N |
500 |
21 |
22 |
|
|
P |
800 |
|
|
|
|
Q |
1250 |
|
|
|
|
R |
2000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
This up arrow means, use the first sampling plan BELOW
the arrow. If sample size equals, or exceeds, lot size,
carry out 100% inspection. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
This down arrow means, use the first sampling plan ABOVE
the arrow. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Sample Size Code Letters |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
Special Inspection Levels |
|
General Inspection Levels |
|
|
|
Lot or Batch Size |
S-1 |
S-2 |
S-3 |
S-4 |
|
I |
II |
|
III |
|
|
|
2 to 8 |
A |
A |
A |
A |
A |
A |
B |
|
|
|
9 to 15 |
A |
A |
A |
A |
A |
B |
C |
|
|
|
16 to 25 |
A |
A |
B |
B |
B |
C |
D |
|
|
|
26 to 50 |
A |
B |
B |
C |
C |
D |
E |
|
|
|
51 to 90 |
B |
B |
C |
C |
C |
E |
F |
|
|
|
91 to 150 |
B |
B |
C |
D |
D |
F |
G |
|
|
|
151 to 280 |
B |
C |
D |
E |
E |
G |
H |
|
|
|
281 to 500 |
B |
C |
D |
E |
| |