Scheduling to Minimize Average Completion Time: Off-Line and On-Line Approximation Algorithms
نویسندگان
چکیده
منابع مشابه
On-line scheduling to minimize average completion time revisited
We consider the scheduling problem of minimizing the average-weighted completion time on identical parallel machines when jobs are arriving over time. For both the preemptive and the nonpreemptive setting, we show that straightforward extensions of Smith’s ratio rule yield smaller competitive ratios than the previously best-known deterministic on-line algorithms. c © 2003 Elsevier B.V. All righ...
متن کاملScheduling to Minimize Average Completion Time : O - line and On - line Approximation AlgorithmsDedicated to the memory of Gene
In this paper we introduce two general techniques for the design and analysis of approximation algorithms for NP-hard scheduling problems in which the objective is to minimize the weighted sum of the job completion times. For a variety of scheduling models, these techniques yield the rst algorithms that are guaranteed to nd schedules that have objective function value within a constant factor o...
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We consider the scheduling problem of minimizing the average weighted completion time on identical parallel machines when jobs are arriving over time. For both the preemptive and the nonpreemptive setting, we show that straightforward extensions of Smith’s ratio rule yield smaller competitive ratios compared to the previously best-known deterministic on-line algorithms, which are (4+ ε)-competi...
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We consider the problem of scheduling jobs on-line on a single machine and on identical machines with the objective to minimize total completion time. We assume that the jobs arrive over time. We give a general 2-competitive algorithm for the single machine problem. The algorithm is based on delaying the release time of the jobs, i.e., making the jobs artificially later available to the on-line...
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We address the problem of off-line fault tolerant scheduling of an algorithm onto a multiprocessor architecture with distributed memory and provide a generic algorithm which solves this problem. We take into account two kinds of failures: fail-silent and omission. The basic technique we use is the replication of operations and data communications. We then discuss the principles which govern the...
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ژورنال
عنوان ژورنال: Mathematics of Operations Research
سال: 1997
ISSN: 0364-765X,1526-5471
DOI: 10.1287/moor.22.3.513