After the business, application/data, and technology architecture designs have been created, it is vital to engage with stakeholders to review these artifacts and gain their sign-off, ensuring that the designs meet the business requirements and are aligned with the strategic direction of the company. Transition Architectures are an essential part of building the Architecture Roadmap as they provide interim 'target states' that enable the organization to move towards the final architecture in a controlled manner. Creating the initial drafts of the work packages and the project/rollout plan is necessary to commence the detailed planning for implementation.
Reference = This approach is documented within the SAP Enterprise Architecture development process, which underscores the importance of stakeholder engagement, Transition Architectures, and detailed planning for successful EA implementation. Relevant documents include "SAP Enterprise Architecture Framework" and "Transition Architecture Planning in SAP Environments."