The practice of conducting enterprise analysis, design, planning, and implementation, using a comprehensive approach for the successful development and execution of strategy. It applies architecture principles to the business, information, application, and technology layers.
EA provides the "City Plan" for the organization. Without it, you get urban sprawl—unconnected systems, redundant data, and technological dead ends.
Modern EA is not about ivory tower diagrams. We practice Evolutionary Architecture. We define the Minimum Viable Architecture needed to start, and then evolve it based on feedback. We are "Architects who Code"—our diagrams are generated from the repo, not drawn in Visio.