Which of the following is not a phase of the ADM?

The correct choice reflects a misunderstanding of the phases within the Architecture Development Method (ADM) as defined in TOGAF. Within the ADM framework, the phases are structured to guide organizations through the development and implementation of architectures, and each phase serves a specific purpose.

The Preliminary phase is essential as it sets the context for the architecture work and prepares the organization for the architecture process. Similarly, Phase D: Technology Architecture focuses on identifying the technology infrastructure needed to support the architecture vision, while Phase F: Migration Planning deals with the process of transitioning from the current state to the desired future state.

However, the specific choice identified as 'Phase C: Requirements Architecture' is not actually termed as such within the ADM phases. The correct designation should be 'Phase B: Business Architecture', which focuses on understanding the business requirements and establishing a framework for how those requirements will be addressed by the architecture.

Understanding the distinction between each phase is crucial for effectively employing the ADM process in real-world applications, enabling organizations to create a coherent and comprehensive architecture that meets their business objectives.