Managing Dynamics of Composite Service Level Agreements with COSMA

Service provisioning is largely built on agreements specifying the mutual responsibilities of service providers and their customers with respect to functional and non-functional parameters. However, the dynamics that result from the service-oriented computing paradigm in particular in composite services place new challenges onto the management of composite service level agreements which could not be achieved yet. This paper discusses the management of SLAs involved in composite services using the COSMA approach. After introducing the COSMA approach, the usage of COSMAdoc instances for negotiating SLAs in composite services is presented in detail.