In which ADM phase are the Transition Architectures defined in Phase E confirmed with the stakeholders?

The correct answer is Phase F, where Transition Architectures defined in Phase E are confirmed with stakeholders. In the Architecture Development Method (ADM) of TOGAF, Phase E is where the actual architecture for the solution is developed and defined, including the Transition Architectures that outline how to move from the current state to a desired future state through a series of steps or transitional phases.

Phase F focuses on the implementation and governance of the architecture. This phase is critical because it involves getting stakeholder confirmation on the Transition Architectures to ensure that all parties are aligned and understand the plan for moving forward. This alignment is vital for successful execution, as it addresses any modifications needed based on stakeholder feedback before implementation begins.

The subsequent phases, such as G and H, deal with the migration planning and architecture change management, focusing on delivering and managing the architecture rather than confirming it. Thus, the stakeholder confirmation of Transition Architectures is a crucial activity that specifically takes place in Phase F.