The project is not completed with the commissioning of a remote or virtual tower solution. Now it is a matter of conducting the post implementation phase and having possible fallback scenarios ready. Have the set goals been achieved, have any additional requirements for the system arisen during the subsequent operational tests or is there a need for changes? These are important questions that must be answered consistently to ensure a stable and beneficial implementation in the long term. If further airports are to be integrated, a thorough lessons-learned analysis is also important. DAS benefits methodically and in terms of content from numerous project experiences.