Four Heads Are Better than One: Combining Suggestions for Case Adaptation

  • Authors:
  • David Leake;Joseph Kendall-Morwick

  • Affiliations:
  • Computer Science Department, Indiana University, Bloomington, U.S.A. IN 47405;Computer Science Department, Indiana University, Bloomington, U.S.A. IN 47405

  • Venue:
  • ICCBR '09 Proceedings of the 8th International Conference on Case-Based Reasoning: Case-Based Reasoning Research and Development
  • Year:
  • 2009

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Abstract

How to automate case adaptation is a classic problem for case-based reasoning. Given the difficulty of developing reliable case adaptation methods, it is appealing to consider methods which can exploit the strengths of a set of alternative adaptation methods. This paper presents a framework for combining suggestions from multiple adaptation methods, and illustrates and evaluates the approach in the context of interactive support for user modification of scientific workflows. The paper presents four adaptation methods for this domain, describes a method for assessing their confidence, proposes four strategies for suggestion combination, and evaluates the performance of the approach. The evaluation suggests that, for this domain, results depend more strongly on the adaptation methods chosen than on the specific combination method used, and that they depend especially strongly on a confidence threshold used for limiting irrelevant and incorrect suggestions.