Roger Sessions has creates a whitepaper on MSDN entitled "A Comparison of the Top Four Enterprise Architecture Methodologies", which provides a history of enterprise architecture approaches, followed by a comparison of the four major methodologies: Zachman Framework for Enterprise Architectures The Open Group Architecture Framework (TOGAF) The Federal Enterprise Architecture (FEA) The Garner/Meta methodology http://msdn2.microsoft.com/en-us/library/bb466232.aspx... Read More...