Therefore, it was attempted to measure the collaboration skills and to construct a knowledge base. The knowledge base construction was based on the past interview records. This paper reports the results of a trial in a software development project, in which the collaboration skills of members were discriminated by using interview reports. The interviews with members were conducted by the project manager from the time of project start-up. The records pertinent to the members who had been active as the then current leaders were extracted. These records were used as a knowledge for collaboration skills. This knowledge was defined as Collaboration Skills Knowledge (CS Knowledge). The discriminant analysis in machine learning with CS Knowledge was performed. As a result of the analysis, discrimination rate of collaboration skills was 81%.