André Schaefer is project lead at Raytion, an internationally operating consultancy for information management and corporate communications focused on enterprise search. He has developed enterprise search solutions for leading global players in the areas of manufacturing, retail and health care. André Schaefer has studied information sciences and computational linguistics, has over 15 years of experience in the computer sciences area and has got a Ph.D. on "The ergonomic design of direct manipulation versus delegation in agent based information systems".