Leading a large public project with high impact on citizens, how should the project manager define the various requirements?

The correct approach is to analyze the interests and influence of stakeholders and evaluate their requirements. This is a core tenet of stakeholder management, ensuring all relevant needs are identified and prioritized, especially in a high-impact public project. Understanding both what stakeholders want and how much they can affect the project is crucial for successful requirements definition and project success. Including only key requirements or common requirements risks missing critical needs and alienating influential stakeholders. Relying solely on the team's opinions ignores the diverse perspectives and essential input from those affected by or contributing to the project.