Validated Retrieval in Case-Based Reasoning

Abstract

We combine simple retrieval with domain-specific validation of retrieved cases to produce a useful practical tool for case-based reasoning. Based on 200 real-world cases, we retrieve between three and six cases over a wide range of new problems. This represents a selectivity ranging from 1.5% to 3%, compared to an average selectivity of only 11% from simple retrieval alone. c flDigital Equipment Corporation 1990. All rights reserved. 1 1 Introduction We have combined simple retrieval (based on the similarity of surface features) with domain-specific validation of retrieved cases to produce a useful practical tool for case-based reasoning. Starting with a case base of 200 real-world cases, we have narrowed our consideration to between three and six cases over a wide range of new problems. This represents a selectivity ranging from 1.5% to 3%, compared to an average selectivity of only 11% from this same case base using retrieval without validation. We are applying the same technol...