891 Market of Resources: A Cost and Effort Model Maria Manuela Cunha Polytechnic Institute of Cávado and Ave Higher School of Technology, Portugal Goran D. Putnik University of Minho, Portugal M IntroductIon Partners search and negotiation, selection, establish- ment of contracts, virtual enterprise integration, moni- toring and enforcement of contracts, and so forth are complex and risky activities required by the virtual enterprise (VE) model. The need to keep a close alignment with the mar- ket environment in permanent change implies the high dynamics of the organizations' structure recon- figurability, introducing a new concept of dynamically reconfigurable global networked structures, traduced by the agile/virtual enterprise (A/VE) organizational dynamics, overcoming the two critical factors against networking, are: · The market of resources as the environment for enabling and management of efficient configura- tion, and assuring virtuality at low transaction costs and reduced risk of knowledge leakage. The broker or organization configuration manager is the main agent of agility and virtuality, acting either between two operations of the A/VE (off- line reconfigurability, providing agility only) or online with the operation (online reconfigurability, providing virtuality, and a higher level of agil- ·