Phase A is initiated upon receipt of which document?

Phase A of the TOGAF ADM (Architecture Development Method) is specifically initiated upon the receipt of a Request for Architecture Work from the sponsoring organization. This document signals the need for an architectural endeavor and outlines the scope and objectives of the architecture work to be undertaken.

The Request for Architecture Work serves as a formal request that provides the necessary context and justification for the architectural project. It acts as a guiding framework that allows the architecture team to align their efforts with the goals of the organization and ensures that their work is relevant and valuable to the sponsoring entity.

In contrast, approval from the Chief Information Officer or a directive from the Chief Executive Officer, while important in the governance of architecture within an organization, do not initiate the ADM process directly. These documents may contribute to the context in which the architecture is being developed but do not specifically kick off the initial phase of architecture development. Similarly, the Implementation and Migration Plan is a later component in the overall ADM cycle that comes into play after the architecture has been developed and approved, thus not relevant for initiating Phase A.