An enterprise architecture is a tool to help executives think about the organization as a whole. An enterprise architecture captures a wide variety of information, establishes relationships among the various documents and diagrams and stores all of the information together in a single repository, so that managers can then see relationships, ask questions, identify problems, or run simulations to help make decisions about changes they are considering… the enterprise architecture is the first step toward an enterprise that can respond in real time. It provides managers with the foundation they will need to quickly make the key decisionsthey will face in the future.