What are the four dimensions used to scope an architecture?

When scoping an architecture engagement, the TOGAF framework recommends defining four key dimensions to establish clear boundaries. These are:
1. Breadth: The parts of the enterprise to be covered (e.g., specific business units, geographies).
2. Depth: The level of detail to which the architecture will be developed.
3. Time Period: The timeframe the architecture will address, including the number and duration of any intermediate Transition Architectures.
4. Architecture Domains: The specific domains to be included (Business, Data, Application, Technology). These dimensions ensure the scope is well-understood by all stakeholders before the work begins.

A. These are the architecture domains, which represent only one of the four scoping dimensions, not all four.
B. These are important business considerations but are not the formal dimensions used for scoping the architecture effort itself.
D. These terms relate to strategic planning and delivery lifecycles, not the specific dimensions for scoping an architecture.

- The TOGAF® Standard, 10th Edition, Part II: ADM, Chapter 2, "Applying the ADM", Section 2.3, "Scoping the Architecture". This section explicitly lists the four dimensions as Breadth, Depth, Time Period, and Architecture Domains.

- The TOGAF® Standard, 10th Edition, Part II: ADM, Chapter 5, "Phase A: Architecture Vision", Section 5.4.3, "Determine Scope".