Which ADM phase starts with the receipt of a Request for Architecture Work from the sponsoring organization?

Phase A, Architecture Vision, is the official starting point of the ADM cycle where the Request for Architecture Work is received and the architecture vision is defined and approved, signaling the start of a new architecture development cycle. This phase focuses on creating a high-level vision of the architecture and obtaining stakeholder consensus.

Phase B (Business Architecture) comes after Phase A and focuses on developing the business architecture, not initiating the project.

Phase H (Architecture Change Management) is the final phase of the ADM, dealing with continuous architecture governance and change, far past the project initiation.

The Preliminary Phase sets up the enterprise architecture capability itself, defining the organizational context for architecture, and precedes any specific ADM cycle.

Requirements Management is a central activity that spans all ADM phases, not a distinct phase that initiates the architecture work.