The diagram of an architecture development cycle shows three phases of the TOGAF ADM. The correct phase names corresponding to the labels 1, 2 and 3 are Requirements Management, Implementation Governance, and Preliminary respectively3. These phases are described as follows:
* Requirements Management (label 1): This phase provides a process for managing architecture requirements throughout the ADM cycle3. It ensures that requirements are captured, stored, prioritized, and addressed by relevant ADM phases3. It also ensures that requirements are validated and updated as necessary3.
* Implementation Governance (label 2): This phase provides a process for ensuring that the implementation projects conform to the defined architecture3. It involves establishing an implementation governance model, defining architecture contracts and compliance reviews, and monitoring and supporting the implementation projects3.
* Preliminary (label 3): This phase provides a process for preparing and planning the architecture project3. It involves defining the scope and vision of the project, customizing the ADM process and content framework, defining principles and governance structures, and evaluating the enterprise architecture maturity and readiness3.