In which phase of the ADM cycle do building blocks become implementation-specific?

Business Architecture defines the business strategy, governance, organization, and key business processes, using more abstract building blocks, not implementation-specific ones.

Data Architecture describes the organization's logical and physical data assets and data management resources, still at an architectural level, not implementation-specific.

Architecture Vision is the initial phase where a high-level vision and business case are established, far from implementation-specific details.

In the Opportunities and Solutions (Phase E) of the ADM, the architectural building blocks defined in previous phases are further refined into implementation-specific solution increments and work packages. This phase identifies the actual opportunities for implementation and migration, detailing how the architecture will be realized through specific projects and solutions.

Technology Architecture defines the logical and physical technology components and their relationships, but the concrete implementation projects and specific product selections happen in later phases like Opportunities and Solutions.