Which ADM Phase includes initial implementation planning?

In TOGAF, Phase E (Opportunities & Solutions) is the first phase that transitions from architecture models into actionable implementation. Within Phase E, architects identify candidate implementation projects or work packages, assess dependencies, cost/benefit, constraints, and derive a high‑level implementation and migration strategy and initial plans. That means the first planning around how to carry out the architecture begins in Phase E. Later phases refine and govern the implementation (e.g. in Phase F and G), but the initial planning belongs in Phase E. Thus Phase E includes the initial implementation planning.