Abstract
In business environment, the case could be highly uncertain, or ambiguity which makes decision making process is strenuous. Therefore, creating a Decision Support System (DSS) to deal with this complexity is significant. In this paper, a DSSs bank has been suggested, where a decision maker select a decision from group of suitable provided decisions. First Order Logic (FOL) has been used for modeling and validating the proposed bank. Four FOL rules have been presented and explained to validate this proposed decisions bank.