The necessary work steps for the development of an automotive are distributed more and more across boarders of divisions, locations and enterprises. Both the technical complexity of products and the organizational complexity regarding the degree of integration are increasing. In order to understand, plan, logically map, and successfully manage the very complex product structure and the highly networked product development-process, commonly accepted structure or process models are used. The creation of these models can be supported by reference-models. In this article a field tested approach for modelling reference-process-models and application of different reference models in a multi-level-model will be shown.