Islamic Azad University
BPEL specified business processes in the Service Oriented Architecture (SOA) are executed by non-scalable centralized orchestration engines. In order to resolve scalability issues, the centralized engines are clustered, which is not a final solution either. Alternatively, several decentralized orchestration engines are being emerged with the purpose of decentralizing a BPEL process into fragments, statically. Fully decentralization of a process into its building activities is an example of static fragmentation methods. The fragments are then encapsulated into run-time components such as agents.