Abstract
An expert system has been built, using fuzzy logic to transform expertise, obtained from leading experts, from tabular linguistic values form to linguistic fuzzy rules. Those fuzzy rules are then been used to establish a knowledge base, that should be helpful to the decision maker in analyzing future situations. The paper presents a methodology for building those linguistic fuzzy rules for an analysis process of information of any field. The system has been implemented on SUN SPARC machine using SICStus PROLOG.