When a crisis occurs, decision makers experience high tension and must make a decision in a short time. An automated tool with accurate analysis capability would help them make correct decisions. This paper presents a visualized tool to help a decision maker understand the structure of a group based on roles and agents (or people). The significant contribution of this tool is that it provides an exact solution to check if a group is workable, and if an agent (or a person) is critical for a

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... . It also suggests a role transfer scheme implementing time sharing mechanisms for when there are an insufficient number of agents (people) to complete a task simultaneously. Because role transfer is a fundamental problem in management, task assignment, and training, this tool can be used in many different ways, such as, training and management. It is also a direct assistance tool for crisis responses.