Improvement in labor productivity is a common problem in each country. In particular, in Japan where the productive age population is decreasing, it is necessary to steadily advance efforts for the improvement at various sites throughout the entire society. In doing so, in order to make it prevail over broad areas, it is necessary to consider that on-site holding resources can be utilized, that it can be easily introduced, and that it will surely be effective. Therefore, we have focused on improving the way of collaboration from an angle of “person’s personality”. Specifically, we have aimed to build a methodology, for a “team” that is a collaborative form widely introduced and utilized at companies and educational sites, which enhances the effectiveness of team activities. As for the overall structure of the methodology, we have designed it with a three-layer structure in order to clarify separation from other intellectual properties and consideration to ethical aspects. That is, the designed methodology comprises the following three phases. Phase I: a team formation methodology; Phase II: a team management methodology; and Phase III: a team development support methodology.

Study results of Phase I were presented at the 26th Design Engineering and System Division Lecture by the Japan Society of Mechanical Engineers (JSME). In this study, we have used the methodology of Phase I to devise, as a method included in Phase II, three Rules for creating a team environment that makes it easy for “introverted” persons in Jungian psychology to express their opinions. Then, we have conducted parallel group randomized trials comparing an intervention group with a control group, analyzed the results by an analysis method such as Data Envelopment Analysis (DEA), and verified the effectiveness of the devised method. As a result, the findings have revealed that teams in which the team management was carried out according to the devised method tends to be more effective and prone to excellent effectiveness.

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