运筹学学报

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可转包两台流水作业机排序的近似算法

陈光亭陈蕾张安1,*   陈永1   

  1. 1. 杭州电子科技大学理学院, 杭州 310018
  • 收稿日期:2016-02-01 出版日期:2016-12-15 发布日期:2016-12-15
  • 通讯作者: 张安 anzhang@hdu.edu.cn
  • 基金资助:

    国家自然科学基金(Nos. 11571252, 11401149), 浙江省自然科学基金(No. LY16A010015), 数学天元基金(No. 11526184)

Approximation algorithms for two-machine flow shop scheduling with an outsourcing option

CHEN GuangtingCHEN LeiZHANG An1,*   CHEN Yong1   

  1. 2.  School of Science, Hangzhou Dianzi University, Hangzhou 310018, China
  • Received:2016-02-01 Online:2016-12-15 Published:2016-12-15

摘要:

研究可转包的两台流水作业机排序问题, 目标是极小化最大完工时间和总外包费用之和. 首先给出最坏情况界为2的近似算法, 接着对工件满足有序化约束的情形给出最坏情况界为\frac{3}{2}的改进算法, 以上算法界均为紧界.

关键词: 可转包, 流水作业, 近似算法, 最坏情况分析

Abstract:

The paper investigates flow shop scheduling with an outsourcing option. The objective is to minimize the sum of the in-house cost and the outsourcing cost, where the in-house cost is measured by the maximum completion time of jobs. We design approximation algorithms to solve the problem. For two-machine flow shop, we provide an algorithm with a worst case ratio of 2. For two-machine ordered flow shop, we give an improved algorithm with worst case ratio \frac{3}{2}. Both ratios are tight.

Key words: outsourcing option, flow shop, approximation algorithm, worst case analysis