Control and data dependencies represent prominent information for modeling, managing, testing and optimizing service based business processes (SBPs). BPMN 2.0, as a twofold-purpose language, can be used to both mode land execute these SBPs. However, there is neither tailored support nor implemented tool for dependency ananlysis of such processes. Therefore, in this paper, we designed and implemented DAT, a dependency analysis tool for SBPs inBPMN. Then, we show the usability of this tool using a realistic case study