Which phase involves the development of the technology architecture?

The development of the technology architecture is primarily addressed in Phase D of the TOGAF Architecture Development Method (ADM). This phase specifically focuses on the formulation and detail of the technology architecture within the broader context of the overall enterprise architecture framework.

During Phase D, important activities include identifying the technology that will be necessary to realize the architecture vision. This includes assessing current technologies, defining future technology requirements, and ensuring that the technology architecture aligns with the business goals and the overall architectural vision established in earlier phases. It systematically develops technology components, such as hardware, software, and network infrastructure elements that will support the applications and data architectures defined in earlier phases.

The other phases mentioned interact with the technology architecture but do not focus on its development. Phase A is concerned with the architecture vision, Phase B is dedicated to business architecture, and Phase F involves migration planning and implementation. Each of these phases set the context, requirements, or planning for technology but do not specifically create or develop the technology architecture itself.