Outsourcing has become one of the key restructuring tools for companies seeking to boost their growth and business performance. As the outsourcing phenomenon has mushroomed, so a range of academic studies have sought to define and describe a unifying theoretical model. Outsourcing: Design, Process and Performance draws upon managerial, economic, sociological, historical and psychological perspectives to bring about a new understanding of how outsourcing design and the outsourcing process feed into the performance of firms. Blending empirical insights from a range of international cases and large-scale statistical tests with existing theoretical perspectives, the author argues that a negative curvilinear relationship exists between outsourcing and firm performance. A critical analysis of current outsourcing strategies, together with a discussion of future trends, offers a new agenda for academic researchers and business managers alike.