Now that a wide range of products and services are being commoditized globally, corporations are increasingly seeking to derive their competitiveness from the knowledge work of their staff. They are considering various measures, such as ways of management focusing on the organization of the company; among them is an approach in which knowledge born in the workplace is turned into organizational strength. More recently, indications are growing that social networks are also important. In reality, however, it is often the case that only information sharing is encouraged, and that the perspective of actually understanding a situation and thereby taking control of it is missing. This paper uses the example of company Y, which has been evaluated highly for its management utilizing ICT, and provides a quantitative association between communication and collaboration, thereby clarifying causal relationships. Based on the acquired results, we propose a management method, which allows the management of collaboration within a company by encouraging the networks of communication.