Table 4: Grey relational analysis.

Ex. number ratio (EWR) ratio (SR) ratio (PC)Normalized value (EWR)Normalized value (SR)Normalized value (PC)GRC (EWR)GRC (SR)GRC (PC)GRG

112.43−14.79−8.490.960.890.070.930.820.350.70
212.10−13.14−6.560.961.000.340.931.000.430.78
310.62−16.23−7.230.940.770.250.900.690.400.66
46.75−15.31−8.620.890.850.050.820.770.340.64
55.92−15.38−8.940.870.840.000.800.760.330.63
67.86−15.83−6.760.910.810.310.850.720.420.66
712.43−14.55−8.160.960.900.120.930.840.360.71
817.20−16.09−8.131.000.790.121.000.700.360.68
914.28−16.40−4.710.980.760.550.960.670.520.72
10−8.24−18.28−4.400.190.580.580.380.540.540.49
11−7.76−17.83−6.520.240.630.340.390.570.430.46
12−6.87−16.78−6.600.320.730.330.420.640.430.50
13−5.54−17.98−5.930.420.610.420.460.560.460.49
14−4.65−19.19−6.190.480.480.380.490.490.450.47
15−4.79−17.87−6.060.470.620.400.480.570.450.50
16−1.06−17.71−5.340.670.640.480.600.580.490.56
171.08−19.57−5.430.750.430.470.670.460.480.54
180.47−18.39−4.240.730.570.600.650.530.550.58
19−10.05−18.56−4.860.000.550.530.330.520.520.46
20−9.53−18.64−4.290.060.540.590.340.520.550.47
21−8.39−18.89−2.600.180.510.740.370.500.660.51
22−7.96−20.02−3.340.220.370.680.390.440.610.48
23−6.72−19.34−3.460.330.460.670.420.480.600.50
24−6.87−19.77−2.920.320.400.710.420.450.630.50
25−5.75−19.03−2.670.400.490.730.450.490.650.53
26−5.33−22.15−0.980.430.050.860.470.340.780.53
27−5.20−22.491.410.440.001.000.470.331.000.60