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In this paper we present a rough set approach to group decisions making. To deal with decision of multiple decision makers we extend dominance-based rough set by introducing specific concepts related to dominance with respect to minimal profiles of evaluations given by multiple decision makers. Our approach differs from existing group decision approaches(More)
As market competition intensifies, customer churn management is increasingly becoming an important means of competitive advantage for companies. However, when dealing with big data in the industry, existing churn prediction models cannot work very well. In addition, decision makers are always faced with imprecise operations management. In response to these(More)
Adverse selection has a significant influence on trading efficiency in insurance markets. Inspired by the quality identification function of the probation period in the secondhand car market, an insurance contract with a low compensation period is designed. It is proved that the contract can distinguish the risk types of the policyholders to achieve a(More)
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