User`s manual

- Formula Constants
The following twwpart table contains the constants that the
CSS uses to calculate control limits:
Divisors
for est.
ofstd
Sample
XBar R
Size
Consts
n 1 A2 d2 D3 D4 =43 c4
I I I I
1.880 1.128
1.023 1.693
0.729 2.059
0.577 2.326
0.000
0.000
0.000
3.267 2.659 0.7979
2.574 1.954 0.8862
2.282 1.628 0.9213
2.114 1.427 0.94cO
6
0.483 2.534 0.000 2.004 1.287 0.95 15 0.030 1.970
7
0.419 2.704 0.076 1.924 1.182 0.9594 0.118 1.882
8 0.373 2.847 0.136 1.864 1.099 0.9650 0.185 1.815
9 0.337 2.970 0.184 1.816
1.032
0.9693
0.239
1.761
10 0.308 3.078 0.223 1.777 0.975 0.9727
0.284 1.716
11 0.285 3.173 0.256 1.744 0.927 0.9754 0.321 1.679
-
12
0.266 3.258 0.283 1.717 0.886 0.9776 0.354 1.646
13
0.249 3.336 0.307 1.693 0.850 0.9794 0.382
1.618
14 0.235 3.407
0.328
1.672
0.817 0.98 10 0.406 1.594
15 0.223 3.472 0.347
1.653 0.789 0.9823 0.428 1.572
16 0.212 3.532
0.363
1.637
0.763 0.9835
17 0.203
3.588 0.378 1.622 0.739
0.9845
18 0.194
3.640 0.39 1 1.608 0.718
0.9854
19 0.187
3.689 0.403 1.597 0.698 0.9862
20 0.180
3.735 0.415 1.585 0.680
0.9869
21 0.173 3.778
0.425 1.575 0.663 0.9876
22 0.167 3.819
0.434 1.566 0.647 0.9882
23 0.162
3.858 0.443 1.557 0.633 0.9887
24
0.157 3.895
0.45 1 1.548 0.619
0.9892
25
0.153 3.931
0.459 1.541 0.606 0.9896
c-7