Integrated lot sizing and tool management in automated manufacturing systems
Author
Aktürk, Mehmet Selim
Önen, Siraceddin
Date
1997Source Title
Proceedings of the 6th Industrial Engineering Research Conference, IERC 1997
Publisher
IIE
Pages
340 - 345
Language
English
Type
Conference PaperItem Usage Stats
116
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30
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Abstract
We propose a new algorithm to solve lot sizing, tool allocation and machining conditions optimization problems simultaneously to minimize total production cost in a CNC environment. Most of the existing lot sizing and tool management methods solve these problems independently using a two-level optimization approach. Thus, we not only improve the overall solution by exploiting the interactions, but also prevent any infeasibility that might occur for the tool management problem due to decisions made at the lot sizing level. We showed that in a set of randomly generated problems 22.5% of solutions found by the two-level approach were infeasible and we improved the solution on the average by 6.79% for the remaining cases with an average computation time of 63.4 seconds.
Keywords
AlgorithmsComputer control
Machine tools
Machining
Numerical control systems
Optimization
Problem solving
Lot sizing
Tool management
Flexible manufacturing systems