运筹学学报 ›› 2015, Vol. 19 ›› Issue (3): 116-122.doi: 10.15960/j.cnki.issn.1007-6093.2015.03.014

• 运筹学 • 上一篇    下一篇

具有多个不可用时间段的单机供应链排序问题

范静1,*, 张峰1   

  1. 1. 上海第二工业大学文理学部, 上海, 201209
  • 收稿日期:2015-05-25 出版日期:2015-09-15 发布日期:2015-09-15
  • 通讯作者: 范静 fanjing@sspu.edu.cn
  • 基金资助:

    上海第二工业大学应用数学重点学科建设项目基金(No. XXKZD1304)

Supply chain scheduling problem with multiple unavailability intervals on a single machine

FAN Jing1,*, ZHANG Feng1   

  1. 1. College of Arts and Sciences, Shanghai Second Polytechnic University, Shanghai 201209, China
  • Received:2015-05-25 Online:2015-09-15 Published:2015-09-15

摘要:

在单机供应链排序问题中, 机器会有多个长度确定的不可用时间段,它仅可以在可用时间段内加工工件,且每个可用时间段的长度不大于给定的常数.多个完工工件可组成一批由一个容量无限制的运输工具发送给客户.问题的目标是如何 安排工件的加工、发送以及不可用时间段,以使总发送时间与总发送费用之和达到最小. 对于工件加工可恢复的情况,可在多项式时间 O(n^2) 内得到最优序. 对于工件加工不可恢复的情况,证明了问题是强NP-难的, 并提出了~2-近似算法.

关键词: 不可用时间段, 供应链排序, 强 NP-难, 近似算法

Abstract:

 We study a single-machine supply chain scheduling problem with multiple unavailability intervals of equal length. The machine processes jobs in availability intervals and the length of each availability interval is no more than a given constant. The completed jobs are delivered in batches to a customer by one vehicle without capacity restriction. Our objective is to minimize the sum of total delivery time and total delivery cost by scheduling the production and delivery of every job as well as the unavailability intervals. If the interrupted job is resumable, we obtain the optimal schedule in the polynomial time O(n^2). If the interrupted job is non-resumable, we prove that the problem is strongly NP-hard and present a 2-approximation algorithm.

Key words: unavailability interval, supply chain scheduling, strongly NP-hard, approximation algorithm