Table of Control Chart Constants
|
Constants for X-bar chart |
Constants for R chart |
Constants for S chart |
|||||
|
Sample Size = n |
A2 |
A3 |
d2 |
D3 |
D4 |
B3 |
B4 |
|
2 |
1.880 |
2.659 |
1.128 |
- |
3.267 |
0 |
3.267 |
|
3 |
1.023 |
1.954 |
1.693 |
- |
2.574 |
0 |
2.568 |
|
4 |
0.729 |
1.628 |
2.059 |
- |
2.282 |
0 |
2.266 |
|
5 |
0.577 |
1.427 |
2.326 |
- |
2.114 |
0 |
2.089 |
|
6 |
0.483 |
1.287 |
2.534 |
- |
2.004 |
0.030 |
1.970 |
|
7 |
0.419 |
1.182 |
2.704 |
0.076 |
1.924 |
0.118 |
1.882 |
|
8 |
0.373 |
1.099 |
2.847 |
0.136 |
1.864 |
0.185 |
1.815 |
|
9 |
0.337 |
1.032 |
2.970 |
0.184 |
1.816 |
0.239 |
1.761 |
|
10 |
0.308 |
0.975 |
3.078 |
0.223 |
1.777 |
0.284 |
1.716 |
|
11 |
0.285 |
0.927 |
3.173 |
0.256 | |||
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