Transporter Scheduling Based on a Network Flow Model for Dynamic Block Transportation Environment

동적 블록수송환경을 위한 네트워크 흐름모형 기반의 트랜스포터 일정계획

  • Lee, Woon-Seek (Systems Management and Engineering, Pukyong National University) ;
  • Lim, Won-Il (CS2 Team, DK UNC Co., Ltd.) ;
  • Koo, Pyung-Hoi (Systems Management and Engineering, Pukyong National University)
  • 이운식 (부경대학교 시스템경영공학과) ;
  • 임원일 (DK유엔씨(주) CS2팀) ;
  • 구평회 (부경대학교 시스템경영공학과)
  • Received : 2008.09.24
  • Accepted : 2008.12.22
  • Published : 2009.03.01

Abstract

This paper considers a transporter scheduling problem under dynamic block transportation environment in shipbuilding. In dynamic situations, there exist the addition, cancellation or change of block transportation requirements, sudden breakdowns and maintenance of transporters. The transportation of the blocks in the shipyard has some distinct characteristics. Some blocks are available to be picked up at a specific time during the planning horizon while some other blocks need to be delivered before a specific time. These requirements cause two penalty times: 1) delay times incurred when a block is picked up after a required start time, and 2) tardy times incurred when a block shipment is completed after the required delivery time. The blocks are located at different areas in the shipyard and transported by transporters. The objective of this paper is to propose a heuristic algorithm based on a network flow model which minimize the weighted sum of empty transporter travel times, delay times, and tardy times. Also, a rolling-horizon scheduling method is proposed for dynamic block transportation environment. The performance of the proposed heuristic algorithms are evaluated through a simulation experiment.

Keywords

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