In this paper, I would like to report on my job experience as a business consultant in Japan. In 2001, I worked in a corporate main-system implementation project in a Japanese traditional chemical company. That project was made up by 4 teams (Accounting, Budgeting, Production control, and Procurement) and each team had about 10 or 12 staff, and it totaled around 50 people. (Fig. 1)　I was assigned in Production control team and functioned as a progress management staff. In …showed first 75 words of 840 total…

…showed last 75 words of 840 total…sometimes tends towards riskier decisions. Therefore, I assume that qualified leadership affects correct decision making of team, and group making decision sometimes causes negative effect to team. I think that these research areas related human behavior (i.e. leader versus follower, group versus individual, etc.) is so profound, but essential to managements. To test whether my assumption is a plausible or not, I would like to learn more about this area in years to come.