Nowadays Computational Systems are being characterized by their complexity, dynamism and great strategic importance. In this complex context of software specification, generating high quality documentation is very difficult. Usually, clients are not sure about their needs and sometimes software requirements do not represent clients and organizational environment needs. Inconsistent and incomplete requirements are very frequent. One of the challenges to solve this problem is to integrate organizational and functional requirements of the system to be developed. In this paper the JGOOSE (Java Goal into Object Oriented Standard Extension) tool used to assist requirement engineers in the development of use cases from the organizational models represented by i* technique is presented. To validate the tool, it was used and applied to the Conference Management System case study.