The theory for self-action and agency of decision makers-agency structure of support for group decision by distribution of rights and duties

The decision group is the group in which its members come together to make decisions to be implemented. In this paper, a classification of four types of decision groups by their distribution of rights and duties among group members are proposed at first. For any type of decision group, it may be possible to get the decision support from decision analysts and decision support systems that are called decision support agencies. But the required decision support may vary either with the related conditions between the decision group and support agencies or with group types. Therefore, the formal model that shows the task allocation between a decision group and decision support agencies is given for each type of decision group.