Aim of the project is the elicitation of case studies of MDE approaches in different domains and their evolution. Thereby, techniques for supporting the elicitation of complex MDE approaches and for the evaluation of the productivity aspect changeability will be applied. In focus during the elicitation of the case studies are the applied manual and automated activities (e.g. generation steps or transformations) as well as the variety of use (modeling) languages. Additionally, it will be captured how each MDE approach was introduced or evolved from previously used approaches (e.g. by introduction of smaller generation steps to automate recurring tasks). In context of this project, we developed a modeling language that supports capturing MDE approaches . In addition, we described first proto-patterns for analyzing how an MDE setting influences changeability of the software .