Many organizations are redesigning or reinventing their business models to make themselves more customer-focused and agile. However, Forrester's clients have recognized a growing gap between an organization's capability to manage change and the challenges of this change. To get all key stakeholders on board and show that your business architecture (BA) efforts all contribute toward a valuable goal, you need a well-defined, documented, and visible strategic plan for BA. This report describes the need for such a plan and offers business-focused enterprise architecture professionals a systematic process for building and maintaining it. Forrester reviews and revises this report periodically for continued relevance and accuracy. We are updating it now to reflect our latest research on the evolving role of business architects in firms with maturing customer-driven planning processes.