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€‰
Chart0.050.10.20.30.050.10.20.30.050.10.20.3

Upper-sided0.030.060.4290.9860.0310.0740.4270.9830.0230.0590.4260.979
200.68200.61200.57200.77200.72200.19200.70200.84200.67200.97200.27200.70
2560.331878.20828.92372.452599.421822.90834.57370.982484.881885.58842.05371.32
0.2050.2790.6361.3050.17750.27930.63481.3050.185480.2790.63481.305
370.50369.95370.39370.39370.32369.92370.59370.59370.40370.33370.59370.58
3638.622640.991263.09564.533743.122661.441262.87566.603663.592721.221253.48567.53
0.290.3660.7461.4780.2820.3640.7471.4780.28440.3680.751.479
500.36500.02500.59500.59500.34499.82500.94499.84499.95500.92499.56500.27
4397.583170.291532.09690.274488.153170.291530.88695.584437.153130.291519.08695.50

Two-sided1.1741.1891.4171.7951.16061.1821.4181.7951.1631.1861.4181.795
200.67200.96200.82200.252294.30199.99200.77200.24199.02200.48200.53200.43
2129.331747.29473.58234.46200.631719.48476.92234.912345.541697.43474.15234.77
1.24241.2671.5632.0581.2441.2691.5592.0571.2391.2631.562.057
370.84370.47370.88370.08370.44370.89370.06370.85370.16369.87369.52370.89
3348.032400.26741.37361.273268.842351.07739.23362.933812.762410.05740.24363.40
1.27861.28541.6422.2051.27811.2871.63742.2011.27881.28931.63762.2
500.26500.55500.58500.61500.23499.84499.38500.26370.28499.91500.02500.35
4014.623410.27913.49449.274084.793381.31914.99449.312513.373282.06913.36449.09