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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
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Acceptable Quality Levels |
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AQL Chart |
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Single Sampling Plans for Normal Inspection |
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Apparel Search 2008 : ApparelSearch.com |
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AQL's in Percent Nonconforming Items and Nonconformities
per 100 items (normal inspection) |
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Sample Size Code Letter |
Sample Size (number of samples) |
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4.0 AQL |
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Acceptable |
Rejected |
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A |
2 |
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B |
3 |
0 |
1 |
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C |
5 |
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D |
8 |
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E |
13 |
1 |
2 |
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F |
20 |
2 |
3 |
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G |
32 |
3 |
4 |
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H |
50 |
5 |
6 |
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J |
80 |
7 |
8 |
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K |
125 |
10 |
11 |
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L |
200 |
14 |
15 |
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M |
315 |
21 |
22 |
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N |
500 |
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P |
800 |
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Q |
1250 |
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R |
2000 |
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This up arrow means, use the first sampling plan BELOW
the arrow. If sample size equals, or exceeds, lot size,
carry out 100% inspection. |
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This down arrow means, use the first sampling plan ABOVE
the arrow. |
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Sample Size Code Letters |
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Special Inspection Levels |
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General Inspection Levels |
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Lot or Batch Size |
S-1 |
S-2 |
S-3 |
S-4 |
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I |
II |
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III |
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2 to 8 |
A |
A |
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B |
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9 to 15 |
A |
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B |
C |
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16 to 25 |
A |
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B |
B |
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C |
D |
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26 to 50 |
A |
B |
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C |
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D |
E |
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51 to 90 |
B |
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C |
C |
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E |
F |
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91 to 150 |
B |
B |
C |
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