The general structure of the Cluster is aligned with the research objectives. This leads us to structure the Cluster organisation in three Integrated Cluster Areas(ICAs) that reflect the mission-critical research demands and follow a coherent and coordinated roadmap. The three ICAs have a coordinated research focus with an intense exchange and integration of approaches and methods. They are clearly identified in terms of 1.) system assessment, 2.) critical technologies for enhancing vehicle performance, and 3.) aircraft energy storage and conversion. In addition, there may be a need to consider ideas outside the structure over the lifetime of the Cluster. Therefore, the governance process provides flexibility not only for defining new research teams, but also for establishing an additional ICA if justified by an increase in knowledge or new research ideas.