What is the first phase of the TOGAF ADM?

The first phase of the TOGAF Architecture Development Method (ADM) is the Preliminary Phase. This phase is crucial as it sets the foundational context for the overall architecture development process.

In the Preliminary Phase, the organization establishes the architecture framework and principles that will guide the architecture work throughout the subsequent phases of the ADM. This includes defining the scope and the relevant stakeholders, obtaining leadership support, and ensuring that the architecture aligns with the business goals and objectives. This early work is essential as it determines how architecture will be applied within the organization and lays the groundwork for the later phases, where specific architectures will be developed.

The other phases listed, such as the Architecture Vision Phase, are subsequent stages in the ADM. They focus on specific deliverables such as a high-level vision of the architecture and the plans for implementing it. However, without a comprehensive Preliminary Phase, the effectiveness of these later stages may be compromised due to a lack of clear guidance and alignment with organizational objectives.