Move-Optimal Schedules for Parallel Machines to Minimize Total Weighted Completion Time
نویسندگان
چکیده
We study the minimum total weighted completion time problem P | | wjCj , which is known to be stronglyNP-hard. We analyze a simple local search heuristic, moving jobs from one machine to another. The local optima can be shown to be approximately optimal with approximation ratio 32 . In case all jobs have equal weight to processing time ratios, the approximation ratio is at most 3 2 − 1 6 .
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