The growing interest in virtual organizations by both the research and industry sectors is the main motivation behind compiling this collection of original contributions as an introduction to this subject. The book primarily addresses the design and development of infrastructures for industrial Virtual Enterprises (VEs); however, the architecture described and several of the tools and design approaches presented are generic enough to be applied to other kinds of virtual organizations. The key areas described in the book include: Reference architectures; Safe communications; Distributed information management; Coordination and workflow; Distributed business processes management; Standards for electronic data interchange; Partners search and VE design and creation; VE configuration and modeling; Inter-operation among technologies; and Integration and reengineering of legacy systems.£/LIST£ In complement to the technological aspects, the social and organizational impacts are also analyzed and a set of recommendations is included. To cover the main technical issues, the book first describes the details of the architecture and the framework developed within the ESPRIT project PRODNET II. Second, to broaden the scope, the book covers several other alternative development approaches. As such, the book is divided into four parts. The first two parts present the work carried out and the innovative results reached within the PRODNET project. Part I provides an introduction to the main VE concepts and requirements, and Part II addresses the PRODNET approach and solutions. Part III of the book is based on a number of selected contributions from several other advanced international research and development projects. Finally, Part IV summarizes the achievements and suggests directions for future research and development. Although the book is prepared in the framework of the PRO-VE'99 conference and is composed of multi-author chapters, all chapters in Parts I, II, and IV are carefully edited for technical accuracy and uniform style of presentation, in order to avoid the typical redundancies found in proceedings books and to facilitate its sequential reading as a textbook. Part III, however, has the usual structure found in proceedings books. Due to current advances in information and communication technology, the base support environments required for the development of VEs now exist. Therefore, the transition from concepts to real systems has become a reality. This book provides a timely approach to such developments. Infrastructure for Virtual Enterprises is essential reading for researchers and engineering students in virtual enterprises (production engineering, computer science, electrical engineering, mechanical engineering), as well as for engineers and practitioners in manufacturing systems organization and planning.