Abstract
Research methodology on project management is investigated. Two methods for this purpose are discussed : one is based on engineering methods which apply the natural sciences and the other is based on the so-called "Case methods" in the social sciences. The research results should satisfy the requirements for scientific characteristics : causality, consistency, and universality. In order to satisfy these characteristics, it is necessary to do research along the line of rational Procedures clarified by the philosophy of science. In this research, the methodology of scientific research on project management is discussed and the basic characteristics that the methods have and the resuits should have are made clear.
