Research Article

Single-Machine Scheduling to Minimize Total Completion Time and Tardiness with Two Competing Agents

Table 5

The performance of the B&B and SA algorithms ( ).

n P τR Branch-and-bound algorithm
Number of nodesCPU timeError percentagesError percentages
MeanSDMeanSDMeanSDMeanSD

160.250.250.25 1585.081474.520.020.020.150.910.110.73
0.50 2095.262732.660.020.030.150.500.140.59
0.75 2222.284286.490.020.040.130.610.140.58
0.500.25 2065.722321.270.020.020.100.590.090.54
0.50 4513.856357.050.040.050.050.320.170.66
0.75 8619.2621890.460.070.180.110.310.19 0.55
0.5 0.250.25 1393.401012.040.010.010.271.830.151.36
0.50 1705.391475.570.020.020.442.340.452.10
0.75 2492.713162.690.020.030.401.750.201.12
0.500.25 708.371012.710.010.010.000.000.000.00
0.50 2342.186513.620.020.050.230.960.311.29
0.75 4389.436513.390.030.050.140.880.170.91

200.250.250.25 6440.118778.620.100.130.140.690.210.83
0.50 8888.2112532.100.120.160.441.190.290.93
0.75 37910.61169197.470.522.440.170.590.290.85
0.500.25 31509.93119592.040.411.690.200.720.240.79
0.50 77321.28252992.050.983.450.190.730.220.72
0.75 107661.85496233.511.336.280.140.410.19 0.72
0.5 0.250.25 6080.797331.260.090.100.241.540.151.30
0.50 12825.1617350.450.160.211.053.590.963.16
0.75 30411.2383195.050.371.010.582.150.532.02
0.500.25 3189.295854.180.040.060.130.930.201.07
0.50 20391.6749137.990.220.550.571.760.591.85
0.75 86350.21282470.700.953.220.421.190.671.47

240.250.250.25 28131.4539702.430.598.360.260.770.240.73
0.50 100685.98354838.972.1584.590.310.840.210.68
0.75 281777.41669598.755.79131.440.210.620.190.59
0.500.25 223096.411334703.634.35265.110.270.690.250.67
0.50 707912.811682584.5013.42327.850.310.640.260.47
0.75 2069551.884812524.5047.371083.820.260.500.26 0.60
0.5 0.250.25 28694.7051288.520.5710.110.462.340.802.93
0.50 130640.24489352.942.2679.840.201.000.442.22
0.75 259434.69552024.634.5897.950.291.360.862.42
0.500.25 17466.5829918.380.264.360.150.760.271.11
0.50 439942.631794187.386.63298.290.461.220.711.75
0.75 2000465.506470223.5034.151047.580.491.320.971.63