Due to the increasing globalization and the simultaneous reduction of vertical integration by a large number of companies, procurement and supply chain management has gained tremendous importance during the last couple of years. The series " Professional Supply Management " contributes to coping with the increasing importance of these topics. The publications deal with current problems as well as with innovations and excellence approaches in the management of value networks and combine theoretical concepts with practical applications. The series is published by the "Kerkhoff Competence Center of Supply Chain Management" of the University of St.Gallen. It is addressed both to scientists and to specialists and executive staff in the business world.