We can think of an "enterprise" as any human undertaking, endeavor, or project. Whenever people collaborate in an enterprise, it requires three distinct constituents: (1) the business or operations performed by the enterprise, (2) the technologies or infrastructure that supports the enterprise, and (3) the organization or management that directs and governs the enterprise. To genuinely provide an holistic understanding of an enterprise from an architectural and systems perspective, enterprise architecture (EA) must cover all three areas: organization, business, and technology. In the accompanying Executive Report, we look at what EA can learn from organization design (OD) models.