This lecture fuses the stakeholder-centric strategies of John McManus’s 'Managing Stakeholders in Software Development Projects' with the latest research on project requirements. We’ll journey through the art and science of defining, gathering, and managing requirements, always considering how stakeholder engagement, as championed by McManus, transforms theory into successful practice. By blending book insights with research-backed best practices, we’ll uncover how requirements become the linchpin of project clarity, alignment, and delivery.