CBR outcome evaluation for high similar cases: a preliminary approach

Authors:
José M. Juarez;Manuel Campos;Antonio Gomariz;José T. Palma;Roque Marín
Affiliations:
Information and Communication Engineering Department, University of Murcia, Spain;Computer Science and Systems Department, University of Murcia, Spain;Information and Communication Engineering Department, University of Murcia, Spain;Information and Communication Engineering Department, University of Murcia, Spain;Information and Communication Engineering Department, University of Murcia, Spain
Venue:
CAEPIA'09 Proceedings of the Current topics in artificial intelligence, and 13th conference on Spanish association for artificial intelligence
Year:
2009

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Abstract

Case-based reasoning has demonstrated to be a suitable similarity-based approach to develop decision-support system in different domains. However, in certain scenarios CBR finds difficulties to obtain a reliable solution when retrieved cases are highly similar. For example, patients from an Intensive Care Unit are critical patients in which slight variations of monitored parameters have a deep impact on the patient severity evaluation. In this scenario, it seems necessary to extend the system outcome in order to indicate the reliance of the solution obtained. Main efforts in the literature for CBR evaluation focus on case retrieval (i.e. similarity) or a retrospective analysis. However, these approaches do not seem to suffice when cases are very close. To this end, we propose three techniques to obtain a reliance solution degree, one based on case retrieval and two based on case adaptation. We also show the capacities of this proposal in a medical problem.