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Fuzzy Set Approach

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Encyclopedia of Database Systems

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Synonyms

Fuzzy MCDM; Fuzzy multicriteria decision making

Definition

The classical multicriteria decision making theory is based on the assumption that all the criteria can be characterized precisely so that it is possible to decide unambiguously, whether each alternative fulfils the given criterion or not. However, this is rarely the case in practice and so, the fuzzy set approach has been proposed which makes it possible to assume that the criteria can be evaluated imprecisely, for example “high quality, low reliability, very low weight,” etc. Unlike classical approach which first dissolves imprecision and then constructs a decision model, the fuzzy set approach dissolves imprecision only at the very end, if necessary.

The basic concepts of fuzzy decision making are the following:

  1. 1.

    Decision based on the imprecisely defined set of alternatives, i.e., a fuzzy set of alternatives. This is called decision in a fuzzy environment.

  2. 2.

    Decision based on aggregation of imprecisely defined...

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Recommended Reading

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Author information

Authors and Affiliations

    Authors
    1. Vilém Novák
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    Editor information

    Editors and Affiliations

    1. College of Computing, Georgia Institute of Technology, 266 Ferst Drive, 30332-0765, Atlanta, GA, USA

      LING LIU (Professor) (Professor)

    2. Database Research Group David R. Cheriton School of Computer Science, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, ON, Canada

      M. TAMER ÖZSU (Professor and Director, University Research Chair) (Professor and Director, University Research Chair)

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    © 2009 Springer Science+Business Media, LLC

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    Novák, V. (2009). Fuzzy Set Approach. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_564

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