Abstract
It is well known that the understanding of the group dynamics is important for an effective program/project team. In recent years, the diversity's trend makes program/projects members cooperate with other members of a variety background. But the grasping the team state is difficult with observing. In this report, we analyzed the Gini inequality index (Gini-ratio) as the team-contribution ratio. At the result, we found that it is easy to grasp the team state by the team-contribution ratio.