Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30489
Title: Machining process sequencing with fuzzy expert system and genetic algorithms
Authors: Wong, TN
Chan, LCF
Lau, HCW
Keywords: Cost-tolerance
Fuzzy expert system
Genetic algorithms
Process planning
Process sequencing
Uncertainty
Issue Date: 2003
Publisher: Springer
Source: Engineering with computers, 2003, v. 19, no. 2-3, p. 191-202 How to cite?
Journal: Engineering with computers 
Abstract: Traditional process planning systems are usually established in a deterministic framework that can only deal with precise information. However, in a practical manufacturing environment, decision making frequently involves uncertain and imprecise information. This paper describes a fuzzy approach for solving the process selection and sequencing problem under uncertainty. The proposed approach comprises a two-stage process for machining process selection and sequencing. The two stages are called intra-feature planning and inter-feature planning, respectively. According to the feature precedence relationship of a machined part, the intra-feature planning module generates a local optimal operation sequence for each feature element. This is based on a fuzzy expert system incorporated with genetic algorithms for machining cost optimization according to the cost-tolerance relationship. Manufacturing resources such as machines, tools, and fixtures are allocated to each selected operation to form an Operation-Machine-Tool (OMT) unit in the manufacturing resources allocation module. Finally, inter-feature planning generates a global OMT sequence. A genetic algorithm with fuzzy numbers and fuzzy arithmetic is developed to solve this global sequencing problem.
URI: http://hdl.handle.net/10397/30489
ISSN: 0177-0667
DOI: 10.1007/s00366-003-0260-4
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