At which phase do Architecture Building Blocks (SBBs) first appear in the ADM cycle?

Architecture Building Blocks (SBBs) are introduced in Phase D of the Architecture Development Method (ADM) cycle. This phase focuses on the Technology Architecture, where the SBBs are derived and defined based on the architecture requirements outlined in earlier phases. During this phase, the organization begins to translate high-level architecture into detailed designs, and the SBBs represent the components that will be used within these designs.

It's essential to understand that prior phases, such as Phase A (Architecture Vision) and Phase B (Business Architecture), emphasize establishing the architecture vision and developing the business-related components, but they do not involve the detailed technological elements that come with SBBs. Phase C (Information Systems Architectures) deals primarily with data and application architectures. However, it is Phase D where SBBs become prominent as the focus shifts to the specifics of technology that will support the architecture defined in the previous phases.