Acknowledgements

I would like to thank all people involved in this project for their support. In the first place, I want to thank Professor Harald Gall for giving me the opportunity to write this thesis at the Software Evolution and Architecture Lab and for providing me with the infrastructure. Then, I want to thank Dr. Gerald Reif for giving me the idea for this project and for supervising my daily work. His big engagement, critical thoughts and precise work helped to bring this project to a higher level. In our meetings, he inspired me with new ideas and encouraged me to come up with even better solutions. I also want to thank him for proofreading this thesis. Second, I want to thank Matthias Hert for testing our application and for expressing some constructive criticism. I also want to thank him for proofreading my thesis and for sharing his experience inwriting. Then, I thankMaria Olivares who supported us during the development by sharing her domain knowledge and inspiring us with innovative ideas. Her detailed test feedback was of great value to us. A big thanks goes to my friends Mark and Thomas. I want to thank Mark for being a part of this project and for his active cooperation. It was very motivating to work on his side, to discuss and develop solutions to problems we were facing during this project. Without Mark