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Study on Process Layout Optimization Method Based on Shape and Form of Basic Units

Author: LiuXunBo
Tutor: SunXiaoMing
School: Shanghai Jiaotong University
Course: Management Science and Engineering
Keywords: Facilities layout two-stage layout optimization genetic algorithm penalty function facility group aspect ratio
CLC: F224
Type: Master's thesis
Year: 2012
Downloads: 53
Quote: 0
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Abstract


Facility Layout Optimization problems are widely used in production system and how good facility layout is has critical influence to production cost and efficiency. With the rapid development of manufacturing industry, facility layout become more and more important and more importance is paid to the application and development of the facility layout optimization. Based on the process layout, facility groups, major layout for mass batches and small quantities production, can be used for enterprises to rapid respond to changing information and to demand to new product on market.Study on facility group layout booms in the last few years, with quantities of analyses and new methods put forward. However, significant layout efficiency and quality could not be achieved due to inherent restraint of shapes of facility.This paper has developed and designed a two-stage optimization model for the study of facility layout of restructured facility group based on previous studies. The advantage of the model is its minimum total logistics and best performance; it can solve with a new method the restraint of shape and better tackle optimization problems of facility group layout based on the principle of process. 1st stage of the model focused on the improvement of layout efficiency. Slicing tree was used to show the arrangement of facility group layout; chromosome codes were formed utilizing facility, relation and location; then initial solutions were produced combining the stochastic principle and adjacency of facility groups; genetic process was adopted independently on the three section of the chromosome; penalty function was changed by utilizing dynamic and feedback mechanism. 2nd stage of the model focused on the adjustment of facility groups. Utilization ratio of area and optimal combination was used as a starting point, while aspect ratio for the study of combination and partition of facility group; heuristic algorithm was put forward to choose the best layout after comprehensive evaluation of the stage.In the end, this paper validated the effectiveness and feasibility of the two-stage Optimization Algorithm through using typical and real cases.

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