Recent research and developments emphasize the need for better understanding and characterization of the basic principles and mechanisms for planning and operation of collaborative networks. Building a sounder foundation, namely in terms of proper theoretical principles, ontology, and formal models capturing the concepts, entities, behavior, and operations of the CNs, continues as an important challenge. Understanding and being able to measure the benefits and risks of collaboration is another challenge. New value systems, adequate performance assessment methods and trust establishment approaches are needed in order to support value creation through collaborative networks.PRO-VE, as the most focused scientific / technical conference in the area, offers a major opportunity for the presentation and discussion of both the latest research developments and industrial practice case studies. Following the IFIP vision, PRO-VE offers a forum for collaboration among different regions of the world. This conference continues a series of successful conferences of PRO-VE’99 (held in Porto, Portugal), PRO-VE 2000 (Florianópolis, Brazil), PRO-VE’02 (Sesimbra, Portugal), PRO-VE’03 (Lugano, Switzerland), PRO-VE’04 (Toulouse, France), PRO-VE’05 (Valencia, Spain), PRO-VE’06 (Helsinki, Finland), and PRO-VE’07 (Guimarães, Portugal).