A genetic algorithm for integration of process planning and scheduling in a job shop

A genetic algorithm for integration of process planning and scheduling in a job shop

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Article ID: iaor20063348
Country: South Korea
Volume: 30
Issue: 3
Start Page Number: 55
End Page Number: 65
Publication Date: Sep 2005
Journal: Journal of the Korean ORMS Society
Authors: , ,
Keywords: heuristics
Abstract:

In recent manufacturing systems, most jobs may have several process plans, such as alternative sequence of operations, alternative machine, etc. A few researches have addressed the necessity for the integration of process planning and scheduling function for efficient use of manufacturing resources. But the integration problem is very difficult and complex. Many prior researches considered them separately or sequentially. It introduces overlapping or partial duplications in solution efforts. In this paper, integration problem of jobs with multiple process plans in a job shop environment is addressed. In order to achieve an efficient integration between process planning and scheduling by taking advantage of the flexibility that alternative process plans offer, we designed GA (Genetic Algorithm)-based scheduling method. The performance of proposed GA is evaluated through comparing integrated scheduling with separated scheduling in real world company with alternative machines and sequences of operations. Also, a couple of benchmark problems are used to evaluate performance. The integrated scheduling method in this research can be effectively applied to the real case.

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