Enterprise architecture (EA) is the organizing logic for a firm's core business processes and IT capabilities captured in a set of policies and technical choices. Handbook of Enterprise Systems Architecture in Practice provides a comprehensive and unified reference overview of practical aspects of enterprise architecture. This Premier Reference Source includes a complete analysis of EA theory, concepts, strategies, implementation challenges, and case studies. The impact of effective enterprise architecture on IT governance, IT portfolio management, IT risks, and IT outsourcing are described in this authoritative reference tool. Researchers and IT professionals will gain insights into how firms can maximize the business value of IT and increase competitiveness.