A global logistics company, FleetForward, is experiencing significant operational inefficiencies due to siloed regional operations. The executive board has approved a strategic initiative called 'One Fleet' to standardize processes and systems globally. As the lead business architect, you are in Phase A (Architecture Vision) and need to create a compelling narrative to secure stakeholder buy-in and clearly articulate the business problem and the desired outcomes of the transformation. Your primary objective is to align all regional managers, who are resistant to change, on a common understanding of the current challenges and the future state vision. You need a tool that facilitates this dialogue by exploring the business context, identifying key stakeholders and their concerns, and defining the high-level requirements that will drive the subsequent architecture work in Phase B. The output must be easily understood by both business and technical audiences and serve as a foundational reference for the entire ADM cycle. Which TOGAF technique is most appropriate for achieving these objectives in Phase A?