Research Article
Triple Homogeneously Weighted Moving Average Charts for Monitoring Process Dispersion
Table 7
Performance measures for two-sided
chart versus two-sided competing charts when
= 15 for
.
| | | | | | | | | | | | | | | |
| | | 1.2553 | 2.122 | 1.513 | 1.71 | 2.277 | 1.186 | 1.466 | 2.515 | 1.796 | 1.993 | 2.478 | 0.5 | 1.01 | 1.01 | 1.18 | 1.01 | 1.03 | 1.16 | 1.01 | 1.02 | 1.40 | 1.04 | 1.08 | 1.25 | (0.11) | (0.13) | (0.54) | (0.12) | (0.17) | (0.37) | (0.11) | (0.21) | (0.72) | (0.20) | (0.27) | (0.45) | 0.55 | 1.04 | 1.05 | 1.45 | 1.06 | 1.11 | 1.35 | 1.04 | 1.10 | 1.78 | 1.14 | 1.21 | 1.48 | (0.28) | (0.32) | (0.81) | (0.26) | (0.32) | (0.52) | (0.29) | (0.43) | (0.92) | (0.38) | (0.44) | (0.58) | 0.6 | 1.13 | 1.17 | 1.82 | 1.18 | 1.26 | 1.61 | 1.14 | 1.27 | 2.22 | 1.33 | 1.43 | 1.78 | (0.50) | (0.56) | (1.02) | (0.47) | (0.52) | (0.69) | (0.52) | (0.69) | (1.05) | (0.64) | (0.65) | (0.75) | 0.65 | 1.31 | 1.38 | 2.30 | 1.43 | 1.51 | 1.99 | 1.33 | 1.55 | 2.75 | 1.68 | 1.77 | 2.23 | (0.76) | (0.82) | (1.21) | (0.81) | (0.78) | (0.92) | (0.77) | (0.95) | (1.20) | (0.99) | (0.92) | (1.01) | 0.7 | 1.61 | 1.71 | 2.90 | 1.85 | 1.95 | 2.54 | 1.64 | 1.96 | 3.45 | 2.25 | 2.32 | 2.87 | (1.05) | (1.11) | (1.46) | (1.31) | (1.19) | (1.29) | (1.06) | (1.24) | (1.50) | (1.52) | (1.36) | (1.41) | 0.75 | 2.04 | 2.17 | 3.77 | 2.64 | 2.67 | 3.46 | 2.07 | 2.51 | 4.54 | 3.24 | 3.23 | 3.94 | (1.39) | (1.46) | (1.97) | (2.12) | (1.86) | (1.94) | (1.41) | (1.61) | (2.12) | (2.36) | (2.05) | (2.13) | 0.8 | 2.68 | 2.88 | 5.25 | 4.14 | 4.05 | 5.05 | 2.73 | 3.40 | 6.45 | 4.98 | 4.84 | 5.78 | (1.95) | (2.05) | (3.02) | (3.60) | (3.09) | (3.11) | (1.98) | (2.31) | (3.39) | (3.77) | (3.30) | (3.44) | 0.85 | 3.77 | 4.10 | 8.20 | 7.05 | 6.82 | 8.22 | 3.84 | 4.96 | 10.30 | 8.31 | 8.04 | 9.51 | (3.08) | (3.31) | (5.41) | (6.43) | (5.59) | (5.63) | (3.13) | (3.84) | (6.08) | (6.42) | (5.79) | (6.31) | 0.9 | 5.87 | 6.63 | 15.76 | 14.13 | 13.56 | 16.10 | 6.05 | 8.59 | 19.73 | 16.16 | 15.79 | 19.22 | (6.05) | (6.75) | (11.81) | (13.13) | (11.80) | (12.29) | (6.23) | (8.29) | (12.82) | (12.80) | (12.43) | (14.98) | 0.95 | 11.99 | 14.86 | 44.91 | 38.86 | 39.39 | 47.89 | 12.68 | 22.50 | 53.62 | 45.37 | 47.62 | 59.78 | (18.92) | (22.49) | (37.87) | (39.36) | (39.26) | (44.43) | (19.88) | (29.84) | (39.19) | (42.54) | (45.65) | (55.78) | 1 | 199.02 | 200.43 | 199.75 | 200.36 | 200.42 | 199.93 | 200.48 | 200.68 | 200.42 | 200.03 | 200.40 | 200.82 | (2345.54) | (950.48) | (173.11) | (259.54) | (246.45) | (216.08) | (1697.43) | (418.10) | (157.24) | (226.73) | (218.14) | (205.66) | 1.1 | 5.56 | 6.44 | 16.08 | 14.70 | 14.09 | 15.93 | 5.76 | 8.42 | 19.72 | 16.71 | 16.17 | 18.24 | (6.33) | (7.35) | (13.57) | (15.14) | (13.78) | (13.63) | (6.59) | (9.27) | (14.22) | (14.71) | (14.21) | (15.29) | 1.2 | 2.93 | 3.13 | 5.82 | 5.07 | 4.86 | 5.56 | 2.99 | 3.74 | 7.14 | 5.92 | 5.63 | 6.23 | (2.46) | (2.62) | (4.27) | (5.20) | (4.49) | (4.25) | (2.50) | (3.08) | (4.79) | (5.26) | (4.66) | (4.58) | 1.3 | 2.04 | 2.17 | 3.47 | 2.72 | 2.67 | 3.10 | 2.08 | 2.45 | 4.10 | 3.19 | 3.09 | 3.47 | (1.52) | (1.62) | (2.30) | (2.59) | (2.24) | (2.16) | (1.55) | (1.79) | (2.52) | (2.83) | (2.42) | (2.33) | 1.4 | 1.61 | 1.68 | 2.47 | 1.84 | 1.83 | 2.16 | 1.63 | 1.86 | 2.86 | 2.10 | 2.08 | 2.37 | (1.11) | (1.17) | (1.60) | (1.52) | (1.33) | (1.36) | (1.13) | (1.30) | (1.72) | (1.71) | (1.49) | (1.47) | 1.5 | 1.37 | 1.41 | 1.93 | 1.45 | 1.47 | 1.70 | 1.38 | 1.53 | 2.21 | 1.60 | 1.61 | 1.83 | (0.85) | (0.90) | (1.25) | (0.98) | (0.89) | (0.96) | (0.87) | (1.01) | (1.33) | (1.13) | (1.01) | (1.03) | 1.6 | 1.22 | 1.25 | 1.61 | 1.25 | 1.27 | 1.43 | 1.23 | 1.32 | 1.79 | 1.34 | 1.37 | 1.52 | (0.66) | (0.70) | (1.01) | (0.67) | (0.63) | (0.71) | (0.67) | (0.78) | (1.08) | (0.78) | (0.72) | (0.77) | 1.7 | 1.14 | 1.15 | 1.38 | 1.14 | 1.16 | 1.27 | 1.14 | 1.20 | 1.53 | 1.20 | 1.22 | 1.34 | (0.52) | (0.55) | (0.81) | (0.47) | (0.45) | (0.54) | (0.52) | (0.62) | (0.90) | (0.56) | (0.53) | (0.61) | 1.8 | 1.08 | 1.09 | 1.25 | 1.08 | 1.10 | 1.18 | 1.09 | 1.12 | 1.35 | 1.12 | 1.14 | 1.22 | (0.41) | (0.43) | (0.67) | (0.34) | (0.34) | (0.43) | (0.41) | (0.48) | (0.74) | (0.41) | (0.4) | (0.47) | 1.9 | 1.05 | 1.05 | 1.17 | 1.05 | 1.06 | 1.12 | 1.05 | 1.08 | 1.24 | 1.07 | 1.09 | 1.14 | (0.31) | (0.33) | (0.54) | (0.25) | (0.26) | (0.34) | (0.32) | (0.39) | (0.62) | (0.30) | (0.31) | (0.38) | 2 | 1.03 | 1.03 | 1.11 | 1.03 | 1.04 | 1.08 | 1.03 | 1.05 | 1.15 | 1.04 | 1.06 | 1.10 | (0.25) | (0.26) | (0.43) | (0.19) | (0.20) | (0.28) | (0.25) | (0.30) | (0.49) | (0.23) | (0.24) | (0.31) | | 13.16 | 13.48 | 16.36 | 15.45 | 15.39 | 16.21 | 13.29 | 14.15 | 17.57 | 16.15 | 16.16 | 17.15 | | 1.00 | 1.02 | 1.24 | 1.17 | 1.17 | 1.23 | 1.00 | 1.06 | 1.32 | 1.21 | 1.22 | 1.29 | | 1.00 | 1.05 | 1.69 | 1.38 | 1.38 | 1.60 | 1.00 | 1.17 | 1.95 | 1.53 | 1.53 | 1.75 |
| | | | | | | | | | | | | | | | |
| | | 1.994 | 2.736 | 2.202 | 2.294 | 2.645 | 1.795 | 2.463 | 2.785 | 2.297 | 2.47 | 2.719 | 0.5 | 1.07 | 1.37 | 1.47 | 1.17 | 1.25 | 1.39 | 1.07 | 1.37 | 1.47 | 1.17 | 1.25 | 1.39 | (0.36) | (0.70) | (0.59) | (0.39) | (0.45) | (0.52) | (0.36) | (0.70) | (0.59) | (0.39) | (0.45) | (0.52) | 0.55 | 1.23 | 1.73 | 1.80 | 1.38 | 1.48 | 1.67 | 1.23 | 1.73 | 1.80 | 1.38 | 1.48 | 1.67 | (0.63) | (0.92) | (0.75) | (0.58) | (0.59) | (0.66) | (0.63) | (0.92) | (0.75) | (0.58) | (0.59) | (0.66) | 0.6 | 1.51 | 2.18 | 2.22 | 1.71 | 1.80 | 2.05 | 1.51 | 2.18 | 2.22 | 1.71 | 1.80 | 2.05 | (0.89) | (1.06) | (0.89) | (0.82) | (0.78) | (0.86) | (0.89) | (1.06) | (0.89) | (0.82) | (0.78) | (0.86) | 0.65 | 1.89 | 2.70 | 2.76 | 2.18 | 2.27 | 2.60 | 1.89 | 2.70 | 2.76 | 2.18 | 2.27 | 2.60 | (1.12) | (1.21) | (1.12) | (1.13) | (1.05) | (1.19) | (1.12) | (1.21) | (1.12) | (1.13) | (1.05) | (1.19) | 0.7 | 2.41 | 3.39 | 3.56 | 2.90 | 2.95 | 3.46 | 2.41 | 3.39 | 3.56 | 2.90 | 2.95 | 3.46 | (1.39) | (1.49) | (1.58) | (1.57) | (1.48) | (1.77) | (1.39) | (1.49) | (1.58) | (1.57) | (1.48) | (1.77) | 0.75 | 3.12 | 4.45 | 4.91 | 4.03 | 4.10 | 4.95 | 3.12 | 4.45 | 4.91 | 4.03 | 4.10 | 4.95 | (1.81) | (2.10) | (2.48) | (2.29) | (2.24) | (2.91) | (1.81) | (2.10) | (2.48) | (2.29) | (2.24) | (2.91) | 0.8 | 4.27 | 6.30 | 7.38 | 5.96 | 6.13 | 7.86 | 4.27 | 6.30 | 7.38 | 5.96 | 6.13 | 7.86 | (2.67) | (3.35) | (4.27) | (3.58) | (3.77) | (5.45) | (2.67) | (3.35) | (4.27) | (3.58) | (3.77) | (5.45) | 0.85 | 6.50 | 10.04 | 12.53 | 9.93 | 10.60 | 14.48 | 6.50 | 10.04 | 12.53 | 9.93 | 10.60 | 14.48 | (4.68) | (6.01) | (8.32) | (6.79) | (7.68) | (11.69) | (4.68) | (6.01) | (8.32) | (6.79) | (7.68) | (11.69) | 0.9 | 12.10 | 19.26 | 26.30 | 20.82 | 23.43 | 34.19 | 12.10 | 19.26 | 26.30 | 20.82 | 23.43 | 34.19 | (10.42) | (12.71) | (20.28) | (17.20) | (20.44) | (31.54) | (10.42) | (12.71) | (20.28) | (17.20) | (20.44) | (31.54) | 0.95 | 34.87 | 52.53 | 77.90 | 67.35 | 76.22 | 101.27 | 34.87 | 52.53 | 77.90 | 67.35 | 76.22 | 101.27 | (35.92) | (38.63) | (68.91) | (65.03) | (73.91) | (99.67) | (35.92) | (38.63) | (68.91) | (65.03) | (73.91) | (99.67) | 1 | 200.43 | 200.55 | 200.39 | 200.60 | 200.93 | 200.50 | 200.43 | 200.55 | 200.39 | 200.60 | 200.93 | 200.50 | (234.77) | (156.29) | (191.41) | (205.54) | (203.46) | (201.16) | (234.77) | (156.29) | (191.41) | (205.54) | (203.46) | (201.16) | 1.1 | 12.38 | 19.34 | 22.79 | 20.31 | 21.47 | 26.16 | 12.38 | 19.34 | 22.79 | 20.31 | 21.47 | 26.16 | (12.19) | (14.14) | (18.24) | (17.85) | (19.3) | (24.19) | (12.19) | (14.14) | (18.24) | (17.85) | (19.30) | (24.19) | 1.2 | 4.71 | 7.00 | 7.66 | 6.72 | 6.72 | 7.59 | 4.71 | 7.00 | 7.66 | 6.72 | 6.72 | 7.59 | (3.69) | (4.76) | (5.21) | (4.97) | (5.04) | (5.9) | (3.69) | (4.76) | (5.21) | (4.97) | (5.04) | (5.9) | 1.3 | 2.94 | 4.02 | 4.20 | 3.71 | 3.66 | 3.94 | 2.94 | 4.02 | 4.20 | 3.71 | 3.66 | 3.94 | (2.06) | (2.49) | (2.59) | (2.66) | (2.51) | (2.69) | (2.06) | (2.49) | (2.59) | (2.66) | (2.51) | (2.69) | 1.4 | 2.17 | 2.82 | 2.85 | 2.47 | 2.48 | 2.64 | 2.17 | 2.82 | 2.85 | 2.47 | 2.48 | 2.64 | (1.47) | (1.70) | (1.67) | (1.71) | (1.60) | (1.64) | (1.47) | (1.70) | (1.67) | (1.71) | (1.60) | (1.64) | 1.5 | 1.72 | 2.18 | 2.17 | 1.87 | 1.88 | 1.99 | 1.72 | 2.18 | 2.17 | 1.87 | 1.88 | 1.99 | (1.13) | (1.33) | (1.22) | (1.21) | (1.12) | (1.13) | (1.13) | (1.33) | (1.22) | (1.21) | (1.12) | (1.13) | 1.6 | 1.45 | 1.77 | 1.77 | 1.52 | 1.55 | 1.64 | 1.45 | 1.77 | 1.77 | 1.52 | 1.55 | 1.64 | (0.91) | (1.08) | (0.97) | (0.88) | (0.83) | (0.84) | (0.91) | (1.08) | (0.97) | (0.88) | (0.83) | (0.84) | 1.7 | 1.29 | 1.51 | 1.50 | 1.32 | 1.35 | 1.42 | 1.29 | 1.51 | 1.50 | 1.32 | 1.35 | 1.42 | (0.72) | (0.90) | (0.77) | (0.66) | (0.63) | (0.66) | (0.72) | (0.90) | (0.77) | (0.66) | (0.63) | (0.66) | 1.8 | 1.18 | 1.34 | 1.33 | 1.20 | 1.23 | 1.28 | 1.18 | 1.34 | 1.33 | 1.20 | 1.23 | 1.28 | (0.58) | (0.73) | (0.62) | (0.51) | (0.50) | (0.53) | (0.58) | (0.73) | (0.62) | (0.51) | (0.50) | (0.53) | 1.9 | 1.11 | 1.22 | 1.22 | 1.12 | 1.15 | 1.19 | 1.11 | 1.22 | 1.22 | 1.12 | 1.15 | 1.19 | (0.46) | (0.59) | (0.50) | (0.38) | (0.40) | (0.43) | (0.46) | (0.59) | (0.50) | (0.38) | (0.40) | (0.43) | 2 | 1.07 | 1.15 | 1.15 | 1.08 | 1.10 | 1.13 | 1.07 | 1.15 | 1.15 | 1.08 | 1.10 | 1.13 | (0.36) | (0.49) | (0.41) | (0.31) | (0.31) | (0.36) | (0.36) | (0.49) | (0.41) | (0.31) | (0.31) | (0.36) | | 13.99 | 15.99 | 18.18 | 16.96 | 17.21 | 18.58 | 15.29 | 17.44 | 18.84 | 17.67 | 18.17 | 19.94 | | 1.00 | 1.14 | 1.30 | 1.21 | 1.23 | 1.33 | 1.00 | 1.14 | 1.23 | 1.16 | 1.19 | 1.30 | | 1.00 | 1.34 | 1.75 | 1.44 | 1.46 | 1.68 | 1.00 | 1.32 | 1.43 | 1.23 | 1.27 | 1.46 |
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