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A Hierarchical Expert System for Process Planning and Material Selection
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Suhn Beom Kwon (Dankook University)
Young Bong Lee (ADD)
Jae Kyu Lee (KAIST Graduate School of Management)
Vol. 6, No. 2, Page: 29 ~ 40
Keywords
expert system, process planning, CRSP
Abstract
Process planning (selection and ordering of processes) and material selection for product manufacturing are two key things determined before taking full-scale manufacturing. Knowledge on product design. material characteristics, processes, time and cost all-together are mutually related and should be considered concurrently. Due to the complexity of problem, human experts have got only one of the feasilbe solutions with their field knowledge and experiences. We propose a hierarchical expert system framework of knowledge representation and reasoning in order to overcome the complexity. Manufacturing processes have inherently hierarchical relationships, from top level processes to bottom level operation processes. Process plan of one level is posted in process blackboard and used for lower level process planning. Process information on blackboard is also used to adjust the process plan in order to resolve the dead-end or inconsistency situation during reasoning. Decision variables for process, material, tool, time and cost are represented as object frames, and their relationships are represented as constraints and rules. Constraints are for relationship among variables such as compatibility, numerical inequality etc. Rules are for causal relationships among variables to reflect human expert\`s knowledge such as process precedence. CRSP(Constraint and Rule Satisfaction Problem) approach is adopted in order to obtain solution to satisfy both constraints and rules. The trade-off procedure gives user chances to see the impact of change of important variables such as material, cost, time and helps to determine the preferred solution. We developed the prototype system using visual C++ MFC, UNIK, and UNlK-CRSP on PC.
Show/Hide Detailed Information in Korean
공정계획과 재료선정의 동시적 해결을 위한 계층구조 전문가시스템
권순범 (단국대학교 경영정보학과)
이영봉 (국방과학연구소 책임연구원)
이재규 (한국과학기술원 테크노경영대학원)
Cite this article
JIIS Style
Kwon, S. B., Y. B. Lee, and J. K. Lee, "A Hierarchical Expert System for Process Planning and Material Selection ", Journal of Intelligence and Information Systems, Vol. 6, No. 2 (2000), 29~40.

IEEE Style
Suhn Beom Kwon, Young Bong Lee, and Jae Kyu Lee, "A Hierarchical Expert System for Process Planning and Material Selection ", Journal of Intelligence and Information Systems, vol. 6, no. 2, pp. 29~40, 2000.

ACM Style
Kwon, S. B., Lee, Y. B., and Lee, J. K., 2000. A Hierarchical Expert System for Process Planning and Material Selection . Journal of Intelligence and Information Systems. 6, 2, 29--40.
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@article{Kwon:JIIS:2000:97,
author = {Kwon, Suhn Beom and Lee, Young Bong and Lee, Jae Kyu},
title = {A Hierarchical Expert System for Process Planning and Material Selection },
journal = {Journal of Intelligence and Information Systems},
issue_date = {December 2000},
volume = {6},
number = {2},
month = Dec,
year = {2000},
issn = {2288-4866},
pages = {29--40},
url = {},
doi = {},
publisher = {Korea Intelligent Information System Society},
address = {Seoul, Republic of Korea},
keywords = { expert system, process planning and CRSP },
}
%0 Journal Article
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%A Suhn Beom Kwon
%A Young Bong Lee
%A Jae Kyu Lee
%T A Hierarchical Expert System for Process Planning and Material Selection
%J Journal of Intelligence and Information Systems
%@ 2288-4866
%V 6
%N 2
%P 29-40
%D 2000
%R
%I Korea Intelligent Information System Society