Abstract

Case base maintenance is one of the most important issues for current research in Case-Based Reasoning (CBR). In this paper, we propose an extended 6 RE CBR cycle and discuss its two additional steps as part of the maintenance phase of the CBR process. The review step covers assessment and monitoring of the knowledge containers whereas the restore step actually modifies the contents of the containers according to recommendations resulting from the review step in order to keep the knowledge container in a usable state. Here, we focus our attention on the case base. For the review step, we define several quality measures based on different case and case base properties that describe specific characteristics of the case base such as correctness, consistency, uniqueness, minimality, and incoherence. Then, we use these measures to realize monitoring capabilities for the case base container that indicate when the restore step is necessary. Finally, we also describe several methods for modifications of the case base in the restore step and their relation to the review step. We conclude the paper with a discussion of related work and an outline of future directions to extend these aspects of maintenance in CBR.

Bibtex

@ARTICLE{ReinartzIglezakisRoth-Berghofer01, author = {Thomas Reinartz and Ioannis Iglezakis and Thomas Roth-Berghofer}, year = 2001, title = {Review and Restore for Case Base Maintenance}, journal = {Computational Intelligence: Special Issue on Maintaining Case-Based Reasoning Systems}, volume = 17, number = 2, pages = {214--234} }