Which component stores records of architecture decisions, rationale, approval status, and implementation tracking?

The correct answer is the Architecture Repository. This component is designed to be a central store for the architectural artifacts and information necessary for managing an enterprise architecture. Within the Architecture Repository, one can find records of architecture decisions, the rationale for those decisions, their approval status, and details regarding the tracking of their implementation.

The Architecture Repository serves to promote reusability and consistency across projects by providing a structured way to store and retrieve important architecture information. It supports ongoing governance by recording how decisions align with the broader goals and standards of the organization, making it an essential aspect of effective architecture management.

In contrast, while the Governance Log may record the activities and outcomes related to the governance process, it does not typically contain the same level of comprehensive detail regarding architecture artifacts as found in the Architecture Repository. The Architecture Landscape depicts the current state and future vision of the architecture but does not manage decision records. The Reference Library contains documentation, best practices, and standards but lacks the comprehensive tracking and decision-making records that are essential in the Architecture Repository.