Assessing the maintainability of XCON-in-RIME: coping with the problems of a VERY large rule-base

Authors:
Elliot Soloway;Judy Bachant;Keith Jensen
Affiliations:
Department of Computer Science, Yale University, New Haven, Connecticut;Digital Equipment Corporation, Intelligent Systems Technology Group, Hudson, Mass.;Digital Equipment Corporation, Intelligent Systems Technology Group, Hudson, Mass.
Venue:
AAAI'87 Proceedings of the sixth National conference on Artificial intelligence - Volume 2
Year:
1987

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Abstract

XCON is a rule-based expert system that configures computer systems. Over 7 years, XCON has grown to 6,200 rules, of which approximately 50% change every year. While the performance of XCON is satisfactory, it is increasingly becoming more difficult to change. With the goal of facilitating maintenance, DEC has developed a new rule-based language, RIME, in which the successor to XCON, XCON-in-RIME, is being written. This paper evaluates the potential for enhanced maintainability of XCON-in-RIME over XCON.