Service Dependency Analysis based on Process Models and Service Level Agreements

Abstract. In the context of Business Processes there is no method currently for mod-eling inter-service dependencies related to the service’s SLAs. Detection of interservice dependencies at design time is crucial in order to enable effects analysis upon failure or SLA re-negotiation of a service inside a service composition. Existing dependency approaches do not take into account different SLO constraints. The approach is to analyse different approaches for dependency analysis amongst services in a bussines process. Related work will be analyzed in the area of dependencies and relevant con-cepts will be related to our approach. Then we will define what dependencies are in the context of a use-case in logistics and define specific dependencies related to this use case. From these definitions we derive specific requirements for the different parts that compose the algorithm. We then develop an algorithm that detects dependen-cies in the context of their sequence flow and negotiated SLAs. The algorithm is then evaluated with regard to the requirements previously defined. I confirm that I independently prepared the thesis and that I use