Abstract
Abstract Expert systems have been used with great success in fault diagnosis. However, a large rule database is not easy neither to build, update, nor document. This paper presents a method for building knowledge databases based on an explicit means-end model of the target process. The modeling technique used is multilevel flow modeling (MFM), as described by Lind (1990b). This allows the knowledge database to be built, updated, and documented in a graphical language, with internal consistency guaranteed. First, the basics of MFM are described, and then an example of how such a model can be used in fault diagnosis is given.
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