Table 6: The CPU time (sec) under different cases and by three different algorithms.

AverageMaximumMinimalMax-minStandard deviation

Case  1
 GA49.8061.2929.9831.315.23
 IGA49.2259.6529.9529.705.18
 PSO46.4457.0028.3928.614.86

Case  2
 GA106.03 148.03 91.60 56.4316.70
 IGA105.61 148.15 91.59 56.5716.34
 PSO103.12 139.76 89.34 50.4215.23

Case  3
 GA153.52 212.33 133.57 78.7621.95
 IGA152.30 223.71 133.51 90.2022.32
 PSO146.84 206.33 130.14 76.1920.58

Case  4
 GA204.05 273.58 179.03 94.55 26.72
 IGA201.43 286.81 176.25 110.56 27.30
 PSO196.30 293.83 173.33 120.50 26.84

Case  5
 GA260.06 381.33 233.78 147.55 33.58
 IGA260.26 373.89 233.46 140.43 33.13
 PSO252.24 352.52 228.18 124.33 30.20