Journal of Quality and Reliability Engineering

Research Article

Robust Control Charts for Monitoring Process Mean of Phase-I Multivariate Individual Observations

Table 1

Estimates of the model parameters for / control charts.
  = 0.05    = 0.01    = 0.001  
          
2 17.223 41102 2.647 21.134 38170 2.329 27.051 192909 2.508
3 20.134 35844 2.209 24.287 128924 2.344 31.350 1144947 2.718
4 23.152 269357 2.548 28.181 1272773 2.773 35.575 5989325 2.973
5 24.685 467949 2.524 28.437 1417059 2.632 31.013 2666196 2.593
6 26.962 1762051 2.746 29.654 3061216 2.711 31.662 5414248 2.669
7 24.892 1099128 2.493 22.882 1585224 2.416 19.058 3465278 2.444
8 27.236 2908821 2.667 27.245 4922576 2.644 28.326 12134778 2.710
9 23.974 2447649 2.534 21.420 4726835 2.554 18.772 14096595 2.676
10 31.894 12572909 2.914 37.085 34375654 3.033 56.573 172176786 3.301
          
2 17.442 29553 2.494 21.365 31571 2.244 27.594 148747 2.434
3 20.286 22497 2.066 24.387 59096 2.13 31.326 338665 2.402
4 23.095 108855 2.286 27.549 291064 2.372 35.109 1255429 2.576
5 24.796 238966 2.334 28.302 508097 2.367 32.008 1063783 2.377
6 27.585 1041090 2.606 31.126 1882888 2.601 37.136 4714353 2.671
7 28.151 1541634 2.598 30.936 3183762 2.635 39.357 12199414 2.827
8 34.917 14798692 3.127 45.767 75616029 3.419 70.875 840512379 3.904
9 39.191 59094377 3.415 50.271 275604839 3.679 72.768 1960966919 4.039
10 50.733 950607720 4.099 68.154 4696452032 4.379 110.587 56398461817 4.881