Abstract
This paper presents an expert system which uses “ranking method” to solve bridge superstructure selection problem. The “ranking method” is usefully used in bridge selection problem and also can deal with fuzzy set which is used to handle fuzziness in decision knowledge which are collected from various sources.
In the selection, several appropriate alternatives are chosen in consideration of the appropriate combination of superstructures and construction method. The final selected results are shown in the form of a list of ranked alternatives after they are ranked based on judgement of decision knowledge and designer's opinion.
