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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39006

Title: Scheduling annual surveys for ship fleet: a case of tramp shipping services
Authors: Hua-An Lu;Yu-Chang Hsu
Contributors: 國立臺灣海洋大學:航運管理學系
Keywords: Annual survey;Tramp shipping service;0-1 integer programming model;Total unimodularity,
Date: 2012-08
Issue Date: 2016-11-18T07:47:04Z
Publisher: Journal of Taiwan Maritime Safety and Security Studies
Abstract: Abstract:Ships have to assure their seaworthiness and safety while sailing at sea. In the global maritime communities, owners are requested to obtain seaworthiness certificates for ships, under a comprehensive survey scheme, and then to recognize ships that have remained satisfactory for their intended service. This study focuses on the scheduling of annual surveys of ships for tramp shipping services. In a five-year cycle, annual surveys must be held within three months before or after the anniversary date of each ship, which is the ship’s delivery or renew date and month, but only before the anniversary date at the fifth year. This study formulates a 0-1 integer programming model for the annual survey arrangement of ships in month scale for a long time horizon. Besides the regulation constraint, this model also takes into account how to balance the workloads for engineers in preparation of various inspected items. The constraint system of this model has the property of total unimodularity, so an integer solution can be obtained rapidly in every instance. This model can assist owners, particular those who maintain a large ship fleet, to monitor and decide an ideal plan of annual surveys. A tramp service case is tested for scheduling annual surveys of twenty ships. Using a variety of parameter settings, this paper also discusses some practical requirements for exploring further applications of the formulated model.
Relation: 3(4), pp.1-15
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39006
Appears in Collections:[航運管理學系] 期刊論文

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