Mathematical Problems in Engineering

Research Article

Shewhart-Type Charts for Masked Data: A Strategy for Handling the Privacy Issue

Table 4

Masked and unmasked thickness of paint data on refrigerators for five refrigerators from twenty shifts.
P\SN1234567891011121314151617181920
1.02.72.62.32.82.62.22.22.82.42.63.12.42.12.22.43.12.91.92.31.8
2.32.42.32.32.52.32.62.62.82.332.83.22.832.62.41.62.62.8
2.62.62.42.42.62.72.42.62.423.52.22.52.12.52.62.92.62.72.3
2.42.32.52.62.12.222.72.22.52.82.92.62.22.52.81.33.32.82
2.72.82.42.72.82.62.32.52.32.432.52.82.422.11.83.33.22.9
0.92.72.62.32.82.62.22.22.82.42.63.12.42.102.43.12.91.918.41.8
2.32.44.62.32.52.32.62.62.82.332.83.2032.62.41.62.62.8
2.62.62.42.42.65.42.42.62.463.52.22.52.12.52.62.92.62.72.3
2.42.32.52.62.12.222.72.22.52.82.92.62.252.82.63.32.82
2.72.82.42.72.87.82.32.52.32.432.52.82.422.11.83.33.22.9
0.82.72.62.32.82.62.22.22.82.42.63.12.42.12.24.83.12.91.92.31.8
2.32.42.36.92.52.32.62.65.62.3182.83.22.8320.801.62.62.8
2.62.62.42.42.62.72.42.62.443.513.202.12.52.62.92.602.3
2.42.312.52.62.12.222.72.22.52.811.62.62.22.55.61.33.302
5.42.89.62.72.810.42.32.502.432.52.82.422.11.83.302.9
0.52.72.611.52.82.62.22.214122.63.19.62.12.22.43.18.71.913.83.6
18.42.46.913.82.516.12.6019.62.3155.63.2032.6123.215.60
2.62.62.42.42.62.72.42.67.223.505012.52.62.92.62.72.3
2.40004.22.222.72.22.55.6010.44.42.55.61.302.82
24.38.44.82.78.47.82.32.513.82.432.52.82.424.27.23.3160
0.110.87.89.216.815.66.62.22.89.65.29.37.212.604.86.201.92.31.8
9.24.82.32.3104.615.6022.411.5603.201218.27.205.222.4
0137.20132.72.42.62.4274.4102.11502.95.213.56.9
4.82.357.812.62.2102.72.22.52.82.97.8017.55.61.33.31412
08.42.410.819.62.64.6104.62.4912.511.22.428.4913.23.22.9
0.010.82.66.911.21306.68.42.4015.519.216.804.815.55.89.516.112.6
2.39.60.0002.305.20012025.6032.601.620.82.8
18.2137.2018.22.72.418.24.8224.5227.58.4152605.28.14.6
06.9205.200810.82.22.55.6033.82.2102.81.313.28.46
5.45.61210.82.87.84.62.513.84.83102.87.242.15.46.612.88.7