Relations between Customer Requirements,
Performance Measures, and General Case Properties
for Case Base Maintenance

Ioannis Iglezakis and Thomas Reinartz

DaimlerChrysler AG, Research & Technology, RIC/AM,
P.O. Box 2360, 89013 Ulm, Germany
{ioannis.iglezakis, thomas.reinartz}@daimlerchrysler.com



Abstract. The ultimate goal of CBR applications is to satisfy customers using this
technology in their daily business. As one of the crucial issues in CBR for practical
applications, maintenance is important to cope with demands changing over time.
Review and restore are the two steps in CBR that deal with tasks of maintenance. In
order to perform these tasks, we suggested case and case base properties, quality
criteria, and restore operators in earlier publications. In this paper, we specify
concrete performance measures that correspond to general customer requirements,
and analyze the relations between these performance criteria, case properties,
and restore operators. We present initial results on theoretical analyzes on these
relations, and report on examples of experimental studies that indicate that the
suggested case properties and the respective restore operators help to identify
maintenance strategies in order to optimize performance of CBR systems over
time.
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