Research Article

Note on a Single-Machine Scheduling Problem with Sum of Processing Times Based Learning and Ready Times

Table 1

The performance of the branch-and-bound and the heuristic algorithms.

Branch-and-bound algorithmHA
NodeCPU time (sec.)Error
MeanMaxMeanMaxMeanMax

12−0.0517 1230.0008 0.0156 0.0017 0.0176
0.25 158 16720.0048 0.0047 0.0012 0.0187
0.50 374 47110.0058 0.0625 0.0010 0.0172
0.75 666 173800.0092 0.2500 0.0001 0.0053
1.00 213 74290.0033 0.0938 0.0001 0.0048
−0.109 550.0009 0.0156 0.0022 0.0079
0.25 244 22070.0053 0.0312 0.0014 0.0121
0.50 881 143730.0116 0.1562 0.0005 0.0142
0.75 486 177780.0062 0.1875 0.0003 0.0119
1.00 102 14470.0020 0.0312 0.0002 0.0083
−0.1510 1190.0011 0.0156 0.0030 0.0125
0.25 346 32630.0070 0.0469 0.0019 0.0387
0.50 1169 235920.0148 0.2656 0.0005 0.0186
0.75 180 34840.0025 0.0312 0.0002 0.0096
1.00 70 8410.0008 0.0156 0.0003 0.0129
−0.2013 2240.0019 0.0156 0.0004 0.0151
0.25 678 86710.0125 0.1562 0.0022 0.0215
0.50 440 57110.0059 0.0781 0.0008 0.0185
0.75 110 18520.0017 0.0312 0.0005 0.0121
1.00 48 2690.0014 0.0156 0.0000 0.0045

16−0.0548 7190.0066 0.0781 0.0009 0.0039
0.25 5431 1310440.3069 5.5469 0.0006 0.0086
0.50 38532 14114570.8681 31.8281 0.0008 0.0116
0.75 15999 11075040.3728 25.7812 0.0001 0.0040
1.00 870 168490.0211 0.3750 0.0001 0.0046
−0.1064 6730.0081 0.0781 0.0022 0.0083
0.25 13367 8597180.5369 29.1875 0.0012 0.0184
0.50 21592 5352760.4861 10.6562 0.0002 0.0118
0.75 1925 541320.0526 1.5469 0.0003 0.0094
1.00 261 20750.0076 0.0469 0.0001 0.0033
−0.1566 3690.0078 0.0469 0.0038 0.0180
0.25 19822 7124210.6286 14.0938 0.0010 0.0092
0.50 54197 29183021.1222 53.7500 0.0002 0.0066
0.75 1801 1090460.0478 2.9531 0.0001 0.0050
1.00 197 28920.0062 0.0781 0.0000 0.0017
−0.20171 42820.0184 0.3906 0.0038 0.0107
0.25 27159 7257980.8030 16.3594 0.0015 0.0208
0.50 10999 7126050.2536 16.3750 0.0005 0.0127
0.75 320 45080.0087 0.1406 0.0000 0.0040
1.00 109 21010.0031 0.0625 0.0001 0.0068

−0.05158 17610.0253 0.2812 0.0009 0.0041
0.25 337842 778103623.2809 468.5000 0.0007 0.0062
0.50 1676257 5936626039.0003 1204.8750 0.0001 0.0048
0.75 27610 10368010.7211 26.7188 0.0001 0.0033
1.00 3704 1821980.0926 4.0625 0.0000 0.0026
−0.10147 11000.0265 0.1875 0.0020 0.0064
0.25 525486 1827255629.7661 931.7031 0.0009 0.0076
0.50 1104005 5815289625.7080 1319.7812 0.0001 0.0049
0.75 4288 1219940.1178 3.4219 0.0000 0.0033
1.00 1286 243160.0040 0.8594 0.0000 0.0000
−0.15357 50560.0590 0.7500 0.0027 0.0127
200.25 1394787 3506151254.7898 1016.5000 0.0010 0.0096
0.50 98518 30766272.7577 100.0469 0.0000 0.0030
0.75 5682 3917250.1486 9.4219 0.0000 0.0000
1.00 1104 763710.0314 2.1250 0.0001 0.0028
−0.20458 89520.0720 1.1719 0.0040 0.0105
0.25 2498437 4452221377.4317 1213.4531 0.0012 0.0095
0.50 11662 4937490.3208 12.7500 0.0002 0.0052
0.75 543 58270.0161 0.1406 0.0001 0.0035
1.00 317 55880.0097 0.1562 0.0000 0.0000

24−0.05350 97290.0876 2.1250 0.0009 0.0036
0.25 8305284 76961550829.5079 6601.4219 0.0004 0.0046
0.50 6064502 66135367216.9024 2553.3438 0.0002 0.0044
0.75 430956 1680812313.7014 507.8281 0.0000 0.0000
1.00 14553 2883430.4666 6.4531 0.0000 0.0000
−0.10616 99240.1622 2.3750 0.0017 0.0046
0.25 16901968 997540771432.9100 8322.3906 0.0008 0.0078
0.50 3412720 78241619119.5013 2819.4062 0.0000 0.0043
0.75 173689 115822374.8338 279.3125 0.0000 0.0028
1.00 2911 821290.1058 2.7500 0.0000 0.0000
−0.15562 62450.1494 1.5312 0.0027 0.0102
0.25 9840876 79790848558.4099 7802.9844 0.0006 0.0040
0.50 370863 1362653513.3567 479.3594 0.0000 0.0047
0.75 3971 533390.1498 2.1406 0.0000 0.0000
1.00 2929 1947700.1219 8.4688 0.0000 0.0000
−0.202043 674630.5033 15.7969 0.0044 0.0122
0.25 10286808 99187625504.8521 7724.5156 0.0005 0.0076
0.50 30923 5620490.9963 14.6250 0.0000 0.0042
0.75 1685 286920.0706 1.0625 0.0001 0.0029
1.00 431 52410.0184 0.1719 0.0000 0.0021