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Increasing interactions among automotive software functions and the ensuing complexity demand new ways of developing automotive systems. Many functions deployed in the vehicle cut across physical and logical boundaries. Capturing the core interactions underlying system functions, creating logical service architectures and mapping them to varying deployment architectures and product lines are central development tasks that cross-cut requirements capture, architecture design, implementation and validation/verification. The service-oriented development approach we propose addresses these fundamental aspects of automotive system design. In this talk the author demonstrate the description techniques, methodology and tools we have developed, and discuss their application in the context of automotive case studies.