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A Relocation Planning Method for Railway Cars in Final Assembly Shop

Yoichi NAGAO
Shinichi NAKANO
Akifumi HOSHINO
Yasushi KANETA
Toshiyuki KITA
Masakazu OKAMOTO

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E96-A    No.2    pp.554-561
Publication Date: 2013/02/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E96.A.554
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Mathematical Systems Science and its Applications)
Category: Graphs and Networks
Keyword: 
railway car,  final assembly shop,  relocation,  evacuation,  directed graph,  loop,  genetic algorithm,  

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Summary: 
The authors propose a method to make a movement plan for relocation of the railway cars in preparation for the final assembly. It obtains solution through three steps. The first step is to extract the order constraints between the movements of the railway cars based on their locations before and after relocation. The second step is to introduce the movement which puts a railway car into another location temporarily, in order to avoid a deadlock in the movements. And the final step is to obtain the movement order for carrying out the relocation in the shortest time in accordance with the calculated order constraints by using the genetic algorithm (GA). The order constraints are resolved in advance and therefore the movement order can easily be decided by GA. As the result, the developed system takes time shorter than an expert for planning the relocation.


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