Chapter 10The GRIFFIN Collaborative Virtual Communityfor Architectural Knowledge ManagementPatricia Lago, Rik Farenhorst, Paris Avgeriou, Remco C. de Boer, ViktorClerc, Anton Jansen, and Hans van VlietAbstractModern software architecting increasingly often takes place in geograph-ically distributed contexts involving teams of professionals and customers with dif-ferent backgrounds and roles. So far, attention and effort have been mainly dedicatedto individuals sharing already formalized knowledge and less to social, informal col-laboration. Furthermore, in Web 2.0 contexts, little to no attention has been given topractitioners carrying out complex, collaborative, and knowledge-intensive tasks inorganizational contexts.This chapter shows how we can effectively support the combination of formal andinformal collaboration and build a Virtual Community for architectural knowledgesharing. We present a set of collaboration scenarios that define a conceptual modelfor such a Virtual Community. A solution in this area would realize the expectationsof companies involved in IT and working in distributed settings to effectively exploittheir expertise, and turn their professional knowledge into a global IT portfolio.