Research Article

New One-Sided EWMA t Charts without and with Variable Sampling Intervals for Monitoring the Process Mean

Table 6

The out-of-control ATS1 profiles of the VSI and FSI upper-sided NEWMA t charts when ATS0 = 200 and n ∈ {5, 7}.

nλChartUWL+UCL+δ
0.10.30.50.71.01.523

50.1FSI0.681156.7114.417.455.043.462.381.901.43
VSI0.04260.681133.543.971.440.760.400.240.190.14
0.2FSI1.149374.3417.968.095.023.262.171.711.27
VSI0.08081.149349.175.241.560.760.380.220.170.13
0.3FSI1.576387.6723.319.665.523.332.101.631.19
VSI0.11081.576362.917.491.850.810.380.210.160.13
0.4FSI1.993298.3829.4012.026.413.562.101.581.15
VSI0.14011.993274.4210.852.360.920.400.210.160.12
0.5FSI2.4137107.5835.7014.967.713.942.171.571.13
VSI0.15092.413782.8614.363.121.090.440.220.160.11
0.75FSI3.4872120.8149.6022.9011.885.602.521.631.11
VSI0.21793.4872101.4425.446.582.060.640.250.160.11
0.9FSI4.1474126.4755.2927.1014.566.862.901.731.11
VSI0.24304.1474108.0931.619.313.030.850.290.170.11
1.0FSI4.5961129.0758.3529.2316.177.753.191.820.12
VSI0.26934.5961111.2035.6411.533.951.050.320.180.11

70.1FSI0.595843.2110.515.643.902.751.941.581.13
VSI0.04190.595823.422.670.990.520.290.190.160.11
0.2FSI0.985454.5011.745.583.632.471.721.361.04
VSI0.07700.985433.683.060.980.490.270.170.140.10
0.3FSI1.331466.2414.125.983.662.381.611.261.01
VSI0.10401.331444.043.911.040.490.250.160.130.10
0.4FSI1.661076.6817.236.793.872.361.541.201.01
VSI0.12981.661054.225.311.200.510.250.150.120.10
0.5FSI1.986684.9721.037.944.252.421.501.161.00
VSI0.15521.986663.417.201.450.560.260.150.120.10
0.75FSI2.8192101.6931.2412.045.882.841.501.131.00
VSI0.19822.819281.4113.702.750.830.300.150.110.10
0.9FSI3.3416109.3237.1015.247.343.301.551.131.00
VSI0.23503.341689.5118.554.191.170.360.160.110.10
1.0FSI3.7043112.2840.6817.308.443.701.611.131.00
VSI0.26053.704394.5222.025.441.540.420.160.110.10