Research Article
Triple Homogeneously Weighted Moving Average Charts for Monitoring Process Dispersion
Table 1
IC
and
values along with values of
for one and two-sided
charts to achieve
, 370, and 500.
| ā | | | | Chart | | 0.05 | 0.1 | 0.2 | 0.3 | 0.05 | 0.1 | 0.2 | 0.3 | 0.05 | 0.1 | 0.2 | 0.3 |
| Upper-sided | | 0.03 | 0.06 | 0.429 | 0.986 | 0.031 | 0.074 | 0.427 | 0.983 | 0.023 | 0.059 | 0.426 | 0.979 | | 200.68 | 200.61 | 200.57 | 200.77 | 200.72 | 200.19 | 200.70 | 200.84 | 200.67 | 200.97 | 200.27 | 200.70 | | 2560.33 | 1878.20 | 828.92 | 372.45 | 2599.42 | 1822.90 | 834.57 | 370.98 | 2484.88 | 1885.58 | 842.05 | 371.32 | | 0.205 | 0.279 | 0.636 | 1.305 | 0.1775 | 0.2793 | 0.6348 | 1.305 | 0.18548 | 0.279 | 0.6348 | 1.305 | | 370.50 | 369.95 | 370.39 | 370.39 | 370.32 | 369.92 | 370.59 | 370.59 | 370.40 | 370.33 | 370.59 | 370.58 | | 3638.62 | 2640.99 | 1263.09 | 564.53 | 3743.12 | 2661.44 | 1262.87 | 566.60 | 3663.59 | 2721.22 | 1253.48 | 567.53 | | 0.29 | 0.366 | 0.746 | 1.478 | 0.282 | 0.364 | 0.747 | 1.478 | 0.2844 | 0.368 | 0.75 | 1.479 | | 500.36 | 500.02 | 500.59 | 500.59 | 500.34 | 499.82 | 500.94 | 499.84 | 499.95 | 500.92 | 499.56 | 500.27 | | 4397.58 | 3170.29 | 1532.09 | 690.27 | 4488.15 | 3170.29 | 1530.88 | 695.58 | 4437.15 | 3130.29 | 1519.08 | 695.50 |
| Two-sided | | 1.174 | 1.189 | 1.417 | 1.795 | 1.1606 | 1.182 | 1.418 | 1.795 | 1.163 | 1.186 | 1.418 | 1.795 | | 200.67 | 200.96 | 200.82 | 200.25 | 2294.30 | 199.99 | 200.77 | 200.24 | 199.02 | 200.48 | 200.53 | 200.43 | | 2129.33 | 1747.29 | 473.58 | 234.46 | 200.63 | 1719.48 | 476.92 | 234.91 | 2345.54 | 1697.43 | 474.15 | 234.77 | | 1.2424 | 1.267 | 1.563 | 2.058 | 1.244 | 1.269 | 1.559 | 2.057 | 1.239 | 1.263 | 1.56 | 2.057 | | 370.84 | 370.47 | 370.88 | 370.08 | 370.44 | 370.89 | 370.06 | 370.85 | 370.16 | 369.87 | 369.52 | 370.89 | | 3348.03 | 2400.26 | 741.37 | 361.27 | 3268.84 | 2351.07 | 739.23 | 362.93 | 3812.76 | 2410.05 | 740.24 | 363.40 | | 1.2786 | 1.2854 | 1.642 | 2.205 | 1.2781 | 1.287 | 1.6374 | 2.201 | 1.2788 | 1.2893 | 1.6376 | 2.2 | | 500.26 | 500.55 | 500.58 | 500.61 | 500.23 | 499.84 | 499.38 | 500.26 | 370.28 | 499.91 | 500.02 | 500.35 | | 4014.62 | 3410.27 | 913.49 | 449.27 | 4084.79 | 3381.31 | 914.99 | 449.31 | 2513.37 | 3282.06 | 913.36 | 449.09 |
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