Abstract
By the advancement of sensor and analysis technologies, a system that can automatically measure and visualize a team activity has been developed. We have applied this system to a large-scale project and have experimentally measured and analyzed the condition of a communication within it. As a result, we have successfully quantified and visualized the condition of a project communication. A result of a quantification analysis shows that there is a strong relationship between the productivity and the time spent for face-to-face communication. By continually monitoring the face-to-face communication time, we have been able to help exposing a project's problem in the early phase. It has also helped us offer useful information to project manager for solving this exposed problem.