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Rules in incomplete information systems. (English) Zbl 0948.68214
Summary: A new method of computing all optimal certain rules from an incomplete information system is presented and proved. The method does not require changing the size of the original incomplete system. Additionally, several existing rough set methods of computing decision rules from incomplete information systems are analyzed and compared. We show which of these methods are capable of generating all optimal certain rules or a class of optimal certain rules and which methods may lead to generation of false rules.

MSC:
68U35 Computing methodologies for information systems (hypertext navigation, interfaces, decision support, etc.)
68T35 Theory of languages and software systems (knowledge-based systems, expert systems, etc.) for artificial intelligence
68T37 Reasoning under uncertainty in the context of artificial intelligence
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