Abstract
The management of organization is an indispensable element for effective IT investment. The literature abounds in such conclusions that are opposed to technology-oriented informatics. However, we can arrive at the same conclusions from different analytical approaches. One approach is to conduct a quantitative examination of general law in order to maximize performance ; the other approach is to carry out a qualitative exploration of complex causal paths of emergent changes that depend on the practical usages of IT in organizations. In this paper, I employ the "numerical monograph" to explore a causal path along with using electronic patient records in the Tokyo Metropolitan Hospitals ; in other words, I conduct the exploration by using quantitative data.