Abstract
A fuzzy rule-based expert system currently is being developed whose goal is the automation of decision about the five factors of grinding wheel. The decision of those factors is dependent on the dictates of experience, because the constraints and the objective function are little known. Therefore, a heuristic approach to the decision problem has been employed. This paper illustrates the designer's knowledge on the selection from the great variety of the abrasive types, the grain sizes, the grades, the structures and the bond types, and describes the fuzzy logic framed in a way of representing his knowledge as the rule for the use of machine reasoning. Furthermore, the paper describes the fuzzy decisional algorithm used in the inference.