Abstract
CoBRA method is a technique for offering means to develop estimation model of organization by combining expert's experience/knowledge and small number of results data. There are a lot of organizations that can apply CoBRA method because it doesn't need large number of results data for the estimation model's development. This paper presents a procedure for developing a temporary estimation model in a short term by minimum participation of expert of domain which develop estimation model by effectively using "Asset" in which expert's experience/knowledge has already externalized explicit knowledge. Moreover, authors actually applied this procedure, and confirmed the effectiveness of this procedure.