Subject-Oriented Development of Federated Systems -- A Methodological Approach

This paper describes an approach for developing federated IT systems. Those are necessary if independent enterprises want to combine their services to reach common objectives without giving up their independence. According to Conway´s law, organizations produce system designs which fit their organizational structures which might be insufficient for networks. We propose a software development methodology which fits to federated organizations. The proposal is based on Subject-oriented Business Process Management (S-BPM). In S-BPM systems are specified as a set of communicating subjects allowing for both, independent and federated operation. We detail the respective development activities based on subject-oriented modeling.