This book comprises a set of papers selected from those presented at the fifth - International Conference on Enterprise Information Systems -, (ICEIS 2003) held in Angers, France, from 23 to 26 April 2003. The conference was organised by Ecole Superieure d Electronique de l Ouest (ESEO) of Angers, France and the Escola Superior de Tecnologia of Setubal, Portugal. Since its first edition in 1999, ICEIS focuses on real world applications and aims at bringing together researchers, engineers and practitioners interested in the advances and business applications of information systems. As in...