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Combining degrees of impairment: the case of the index of Balthazard

Mathware & soft computing
Publication Date
  • Logic
  • Mathematics


Using techniques for modeling indices by means of functional equations and resources from fuzzy set theory, the classical Balthazard index used in order to combine several degrees of impairment is characterized in two natural ways and its use is criticized. In addition some hints are given on how to study better solutions than Balthazard's one for the problem of com-bining impairment's degrees.

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