On The Extension Of The Gaia Model Study

Gaia is one of the first agent-oriented software engineering methodologies, which explicitly takes social concepts into account.. Luca points out that Gaia is suitable for a design-for-change perspective because of its clear separation from the analysis and the architectural design phases.Unfortunately, Gaia is not entirely suitable for developing adaptive system in open environments. Although Gaia supports "design-for change" and "open agent society ", Gaia does not have explicit models to support development of "continuous design change/adaptation" and "open role space" System. Furthermore, although organizational rule and role is two important abstracts of Gaia, Gaia would not suffice to adequately describe hierarchy of organizational rule and role relation (inheritance, aggregation, association and incompatibility). Gaia doesn't concern the organization rules between partial entities and have no models to support aggregative relation and inheritable relation. FRAG is proposed as a systematic methodology, which is the extension of role models of Gaia on the relation among function, role, and agent, for developing adaptive systems in open environments.On the other hand, while some study was focus on meta-model adopted by different methodology, few work is concerned the purpose of why such meta-model was proposed, only Alexander et al. want to give some principles about a universal process. A variety of models employed by different methodologies limit the progress of MAS, so it is necessary to develop a unified framework which includes the models adopted by different methodologies. Having compared several methodologies, the ORRA process is proposed as a universal process in role-based methodology starting from the purpose of different models adopted in MAS methodology.The Conference Management Case and Intelligent Transportation System Case study is introduced to exemplify ORRA's process and to show the use and effectiveness of FRAG's models in the development of MAS.