This book addresses the 'extended enterprise' paradigm, and more specifically the need of innovative tools for managing the operations in enterprise networks. It reports the results of a research project funded by the Italian Ministry of Education, University and Research (MIUR) during the period 2001-2003. The aim of the research was to design, implement and test an agent-based architecture able to support transaction, information sharing and exchange and even collaboration in a manufacturing enterprise network organized through a neutral linear e-marketplace (EM) business model. The results presented in this book testify how the proposed architecture is able to provide true value to the EM participants; and can therefore be a valid support tool for the 'extended enterprise'. Audience: This volume will be of interest to operations managers, IT specialists and supply chain managements researchers.