Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Enterprise Architecture Management in the field of Enterprise Architecture describes and structures complex IT systems in terms of their business, application, information and technical layers, and to reform programs through the planning process as strategic business demands, and as standards and guidelines for the development of local solutions and service offers. The fundamental pre-requisites for effective EAM are a current, consistent baseline of information about the as-is landscape and an integrated planning process from demand to budget to reach the to-be landscape. The enterprise architecture function also involves reviewing and consolidating detailed architecture decisions and migration plans to identify efficiencies, advance standardization and align business and IT priorities.