Fuzzy-RDR: A New Approach to Create Expert Systems by Domain Expert

Expert systems are widely used in most of area such as industry, management, and business. However, still maintenance is a subject incorporating all these knowledge-based systems, including fuzzy rule-based system. Although, the use of fuzzy concept reduces the maintenance problems partially, it introduces other problems in tuning the numbers used by the system. Ripple Down Rules (RDR) method largely overcome the maintenance problems for conventional crisp systems. The aim of this work was to apply the RDR approach to fuzzy rules to facilitate the maintenance and tuning of the numbers involved. On the other hand the use of fuzzy concept in the RDR system allows more natural expressions of concepts as the main advantage of a fuzzy approach. This paper presents a theoretical foundation for combining RDR and fuzzy concepts.