Stability Factor of Possible Rules in Non-deterministic Information Systems

Abstract

A rule in a Deterministic Information System (DIS) is often defined by an implication T such that both support(T) > alpha and accuracy(T) > beta hold for the threshold values alpha and beta. In a Non-deterministic Information System (NIS), there are derived DISs due to the information incompleteness. A rule in a DIS was extended to either a rule in the lower system or a rule in the upper system in a NIS. This paper newly introduces a criterion, i.e., stability factor, into rules in a NIS. Rules in the upper system are classified according to the stability factor.