Safety-critical automotive systems must ful ll hard real-time constraints for reliability and safety. This paper presents a case study for the application of an AUTOSARbased language for timing modeling and analysis. We present and apply the Timing Augmented Description Language (TADL) and demonstrate a methodology for the development of a speedadaptive steer-by-wire system. We examine the impact of TADL and the methodology on the development process and the suitability and interoperability of the applied tools with respect to the AUTOSAR-based tool chain in the context of our case study.

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Abstract. Safety-critical automotive systems must fulfill hard real-time constraints to guarantee their reliability and safety requirements. In the context of network-based electronics systems, high-level timing requirements have to be carefully mastered and traced throughout the whole development process. In this paper, we outline the management of scheduling-specific timing information by the application of a steerby-wire design example. We apply the principles of the AUTOSARcompliant Timing Augmented Description Language (TADL) following the methodology introduced by the TIMMO project [2]. Focus of the example will be the identification of end-to-end timing constraints and their refinement by means of stimuli-response event chains.