Andrew N. Blumenthal: Enterprise architecture is about planning, managing, and measuring change in an organization. To effect change requires true leadership, and this requires multiple skills. In the book, The Leadership Triad by Dale Zand, three essential forces of leadership are presented knowledge, trust, and power. These leadership forces guide constructive organizational change. Like three horses pulling a chariot, these forces, if coordinated and working together, provide a swift and exhilarating ride. But if one force is mismanaged or pulls against the others, the ride is bumpy and can end in disaster.