Abstract
A project can be led to a success by a well-trained project manager. However, there is still no end to the number of failed projects. All the causes of the failures are not necessarily solved by training of project managers. Since project managers are not almighty, the organizational procedures to make a project successful will be needed for various problems. The project management office supports project managers, and makes the final decisions in each project as organizational. Therefore, the quality of the decision-making will influence the fate of a project. This paper empirically describes about better decision-makings in the problem domain where a project management support organization should be mainly concerned. And for making good decisions which have high quality and speediness, the coordination of processes and the removal of impediments are concretely studied.