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Scenario-based development and test processes are a promising approach forverifying and validating automated driving functions. For this purpose,scenarios have to be generated during the development process in a traceablemanner. In early development stages, the operating scenarios of the item to bedeveloped are usually described in an abstract, linguistic way.Within the scopeof a simulation-assisted test process, these linguistically described scenarioshave to be transformed into a state space representation and converted intodata formats which can be used with the respective simulation environment.Currently, this step of detailing scenarios takes a considerable manual effort.Furthermore, a standardized interpretation of the linguistically describedscenarios and a consistent transformation into the data formats are notguaranteed due to multiple authors as well as many constraints between thescenario parameters. In this paper, the authors present an approach toautomatically detail a keyword-based scenario description for execution in asimulation environment and provide a basis for test case generation. As a firststep, the keyword-based description is transformed into a parameter spacerepresentation. At the same time, constraints regarding the selection andcombination of parameter values are documented for the following process steps(e. g. evolutionary or stochastic test methods). As a second step, theparameter space representation is converted into data formats required by thesimulation environment. As an example, the authors use scenarios on Germanfreeways and convert them into the data formats OpenDRIVE (description of theroad) and OpenSCENARIO (description of traffic participants and environmentalconditions) for execution in the simulation environment Virtual Test Drive.

From Functional to Logical Scenarios: Detailing a Keyword-Based Scenario Description for Execution in a Simulation Environment