Alexander Felfernig is professor of Applied Software Engineering at the Graz University of Technology. In his research he focuses on the areas of knowledge-based configuration and recommender systems. He has written over 150 articles in this area. Lothar Hotz is a researcher at the University of Hamburg. In his research he focuses on knowledge representation issue within the context of knowledge based configuration. He is the author of several books and articles in artificial intelligence Claire Bagley is the Research & Development Director of the Advanced Constraint Technology group at Oracle. In her research and development, she focuses on the application of constraint technology in the industry and specifically but not exclusively in Supply Chain Management business domains such as Configuration applications.