Which of the following is the final step in the development of the four architecture domains?

The final step in the development of the four architecture domains is to create the Architecture Definition Document. This document serves as a comprehensive artifact that encapsulates the outcomes of the architecture development process, summarizing the architecture designs, decisions, and the rationale behind them.

Creating this document comes after all the preceding steps, where the architecture team has engaged in analyzing requirements, evaluating different architectural views, and validating the designs against stakeholder needs and constraints. It pulls together all the previously completed work, including the individual architectures of business, data, application, and technology domains, and ensures that they align with the overall architecture vision and guidelines set out in the Architecture Development Method (ADM).

In contrast, the other options represent activities that may occur at various stages of the architecture development process. Conducting a formal stakeholder review is typically performed to ensure stakeholder alignment and gather feedback after developing the architecture, but it is not the final step. Performing gap analysis is an important step that occurs earlier to identify discrepancies between the current state and desired future state. Selecting relevant models, viewpoints, and tools is also crucial for guiding the architecture development but is generally conducted during the initial phases of architecture work rather than as a final step.