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Control Chart Constants

The control chart constants used in the calculations are shown below.

n d2 c4 d3 c5 e1
1 0.82 *
2 1.128 0.797885 0.8525 0.60281
3 1.693 0.886227 0.8884 0.463251 1.16
4 2.059 0.921318 0.8794 0.38881 1.093
5 2.326 0.939986 0.8641 0.341213 1.198
6 2.534 0.951533 0.848 0.307547 1.134
7 2.704 0.959369 0.8332 0.282154 1.214
8 2.847 0.96503 0.8198 0.262139 1.162
9 2.97 0.969311 0.8078 0.245838 1.223
10 3.078 0.972659 0.7971 0.232238 1.174
11 3.173 0.97535 0.7873 0.220663 1.228
12 3.258 0.977559 0.7785 0.210662 1.188
13 3.336 0.979406 0.7704 0.201901 1.233
14 3.407 0.980971 0.763 0.194154 1.2
15 3.472 0.982316 0.7562 0.187231 1.237
16 3.532 0.983484 0.7499 0.180995
17 3.588 0.984506 0.7441 0.175351
18 3.64 0.98541 0.7386 0.170197
19 3.689 0.986214 0.7335 0.165475
20 3.735 0.986934 0.7287 0.161125
21 3.778 0.987583 0.7242 0.157098
22 3.819 0.98817 0.7199 0.153362
23 3.858 0.988705 0.7159 0.149875
24 3.895 0.989193 0.7121 0.146619
25 3.931 0.98964 0.7084 0.143571
26 3.964 0.990052 0.704059 0.140702
27 3.997 0.990433 0.701158 0.137994
28 4.027 0.990786 0.698327 0.135437
29 4.057 0.991113 0.695565 0.133023
30 4.086 0.991418 0.692872 0.13073
31 4.113 0.991703 0.690245 0.12855
32 4.139 0.991969 0.687685 0.126481
33 4.165 0.992219 0.685188 0.124505
34 4.189 0.992454 0.682755 0.122618
35 4.213 0.992675 0.680385 0.120815
36 4.236 0.992884 0.678075 0.119086
37 4.259 0.99308 0.675825 0.11744
38 4.28 0.993267 0.673634 0.115848
39 4.301 0.993443 0.671501 0.114328
40 4.322 0.993611 0.669424 0.112859
41 4.341 0.99377 0.667402 0.11145
42 4.361 0.993922 0.665435 0.110087
43 4.379 0.994066 0.66352 0.108779
44 4.398 0.994203 0.661657 0.107519
45 4.415 0.994335 0.659844 0.106292
46 4.433 0.99446 0.658081 0.105116
47 4.45 0.99458 0.656366 0.103974
48 4.466 0.994695 0.654699 0.102868
49 4.482 0.994806 0.653077 0.101789
50 4.498 0.994911 0.6515 0.100758
51 4.514 0.995013 0.649967 0.099745
52 4.529 0.99511 0.648476 0.098773
53 4.543 0.995204 0.647026 0.097821
54 4.558 0.995294 0.645616 0.096901
55 4.572 0.995381 0.644246 0.096003
56 4.586 0.995465 0.642913 0.095129
57 4.599 0.995546 0.641617 0.094277
58 4.613 0.995624 0.640356 0.09345
59 4.626 0.995699 0.639129 0.092647
60 4.639 0.995772 0.637936 0.091859
61 4.651 0.995842 0.636775 0.091097
62 4.663 0.99591 0.635644 0.090351
63 4.676 0.995976 0.634543 0.08962
64 4.687 0.99604 0.63347 0.088906
65 4.699