When scoping an architecture in TOGAF, three key axes (dimensions) are used to frame the extent of the architecture work. The first is time period (how far into the future or over what timeframe to plan). The second is depth-how detailed or granular the architecture models will be (e.g., high level, mid level, very detailed). The third is breadth, which refers to which parts (domains, business units, functions) of the enterprise will be included, and which architecture domains (business, data, application, technology) will be in scope. This triple#dimension model helps architects, stakeholders, and governance bodies understand how wide, deep, and forward#looking the architecture effort will be. Thus "breadth, architecture domains" is the correct third dimension.

Concerns are interests important to the stakeholders in a system. They are used to identify and classify the system's stakeholders and to guide the selection of viewpoints for the architecture description. Reference: The TOGAF Standard | The Open Group Website, Section 3.2.1 Architecture Viewpoints

* Phase G: Implementation Governance provides architectural oversight of the implementation. It ensures that the implementation conforms to the Target Architecture using Architecture Contracts and governance frameworks.
* Phase H: Architecture Change Management is about maintaining the architecture lifecycle and handling new requirements, not direct implementation oversight.
* Preliminary Phase is about setting up the architecture capability.
* Phase A is about developing the Architecture Vision.
Reference: TOGAF Standard, Version 9.2, Part II: ADM, Phase G.