Solution approaches for flexible job shop scheduling problems

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2013

Author

Balcı, Şerife Aytuğ

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In this thesis, we consider a flexible job shop scheduling problem existing in discrete parts manufacturing industries. We are motivated by the production environment of Roketsan Missiles Industries Incorporation, operating at Turkish defense industry. Our objective is to minimize the total weighted completion times of the jobs in the system. We formulate the problem as a mixed integer linear program and find that our model could find optimal solutions only to small sized problem instances. For medium and large sized problem instances, we develop heuristic algorithms with high quality approximate solutions in reasonable solution time. Our proposed heuristic algorithm has hierarchical approach and benefits from optimization models and priority rules. We improve the heuristic method via best move with non-blocking strategy and design several experiments to test the performances. Our computational results have revealed that proposed heuristic algorithm can find high quality solutions to large sized instances very quickly.

Subject Keywords

Flexible manufacturing systems., Flexible work arrangements., Heuristic algorithms.

URI

http://etd.lib.metu.edu.tr/upload/12615676/index.pdf
https://hdl.handle.net/11511/22380

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ş. A. Balcı, “Solution approaches for flexible job shop scheduling problems,” M.S. - Master of Science, Middle East Technical University, 2013.