POWER OF PREEMPTION FOR MINIMIZING TOTAL COMPLETION TIME ON UNIFORM PARALLEL MACHINES

被引:8
|
作者
Epstein, Leah [1 ]
Levin, Asaf [2 ]
Soper, Alan J. [3 ]
Strusevich, Vitaly A. [3 ]
机构
[1] Univ Haifa, Dept Math, IL-3498838 Haifa, Israel
[2] The Technion, Fac Ind Engn & Management, IL-32000 Haifa, Israel
[3] Univ Greenwich, Dept Math Sci, London SE10 9LS, England
关键词
scheduling; total completion time; power of preemption; uniformly related machines; UNRELATED MACHINES; LIMITED NUMBER; PROCESSORS; ALGORITHMS;
D O I
10.1137/16M1066610
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
For scheduling problems on parallel machines, the power of preemption is defined as the supremum ratio of the cost of an optimal nonpreemptive schedule over the cost of an optimal preemptive schedule (for the same input), where the cost is defined by a fixed common cost function. We present a tight analysis of the power of preemption for the problem of minimizing the total completion time on m >= 2 uniformly related machines, showing that its value for m = 2 is equal to 1.2, and its overall value is approximately 1.39795.
引用
收藏
页码:101 / 123
页数:23
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