Modeling and analyzing of PCB manufacturing by fuzzy petri net

Pao Yue-kong Library Electronic Theses Database

Modeling and analyzing of PCB manufacturing by fuzzy petri net

 

Author: Lau, Kwok-on
Title: Modeling and analyzing of PCB manufacturing by fuzzy petri net
Degree: M.Sc.
Year: 1998
Subject: Printed circuits
Petri nets
Production control -- Mathematical models
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Pages: 118, [58] leaves : ill. ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1421210
URI: http://theses.lib.polyu.edu.hk/handle/200/1434
Abstract: The author had chosen a manufacturing plant for the problem analysis. In the real manufacturing environment, a lot of potential problems should be solved in order to increase the productivity and efficiency of working. The author had created a proposed manufacturing model that was proven to work by many engineers and specialists. The proposed manufacturing environment was modeled by the use of Coloured Petri Net and then the result was obtained by simulation. The author had spent two days in the real manufacturing plant for site visit and information gathering. The model was then presented into a readable form in Design/CPN. It consisted of 15 pages and altogether 38 colour set and 39 variables. In addition, 178 places and 99 transitions were used to create different pages and sub-pages for the model establishment. After creation of model, the simulation in Design/CPN tested it. The author had taken more than 100 simulations and the results were presented in 11 charts and 5 tables. The author used such graph and charts to analyze the performance of the model and finally made some suggestions based on different resource allocation and model setup. It was found that the result could successfully reflect the situation in the real manufacturing environment and the performance obtained from the model was satisfactory. The use of CPN for the performance analysis of a manufacturing environment was useful to obtain the effect and result before the real manufacturing processes taken place. This method of analysis was helpful in planning and scheduling in production for development without introducing the change in practical situation.

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