In which ADM phase is the Target Architecture defined?

The Target Architecture is defined in the Architecture Definition phase of the Architecture Development Method (ADM) within TOGAF. This phase focuses specifically on creating a detailed specification of the architecture components that are intended to fulfill the strategic objectives and requirements set out in the preceding phase, the Architecture Vision.

During the Architecture Definition phase, architects develop the detailed architectural models that describe the current and target states across Business Architecture, Information Systems Architecture, and Technology Architecture. This is critical because it establishes the blueprint for the enterprise's desired future state, including components such as processes, data, and technology structures.

The Architecture Vision phase primarily focuses on establishing the high-level aspirations and goals of the architecture initiative, without delving into the specifics of the target architecture. The Implementation Governance phase is more concerned with ensuring that the architecture is realized through projects within the enterprise. The Preliminary phase mainly involves preparing and organizing the architecture framework to set the initial context, but it does not address the details of the target architecture itself.