In a model based development process models existing at different levels of abstraction have to be transformed into each other, model information have to be stored transparently and traceable and approaches have to be provided to obtain system components automatically out of detailed models. A further unsolved problem is the early validation of required system functionality by testing approaches. For that purpose test models have to be associated with design models and this information has to be managed consistently even if the participating models evolve. The automatic generation of test components is the final goal of this approach. A required integration of development techniques such as the output of one technique could be used directly as the input of another technique is not available today. To enable this integration in the domain of telecommunication systems is the goal of Rival.