Decision analysis using rough sets. (English) Zbl 0854.90088

Summary: We show that the rough set theory is a useful tool for analysis of decision situations, in particular multicriteria sorting problems. It deals with vagueness in the representation of a decision situation, caused by granularity of the representation. The rough set approach produces a set of decision rules involving a reduced number of most important criteria. It does not correct vagueness manifested in the representation; instead, the rules produced are categorized into deterministic and non-deterministic. The set of decision rules explains the decision situation and may be used to support new decisions. An example illustrates the rough set analysis of a multicriteria sorting problem.


90B50 Management decision making, including multiple objectives
03E72 Theory of fuzzy sets, etc.
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