When faced with a situation where not all requirements can be delivered within the available resources, the project manager should gather all stakeholders and provide recommendations on a smaller, more feasible project scope. This approach ensures that the most critical requirements that add the most business value are prioritized. It also allows for a clear communication of what can be achieved within the constraints of the project, thus setting realistic expectations among all stakeholders. References: Project Management Professional (PMP) Examination Content Outline, June 2015, PMI; A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Sixth Edition, Project Management Institute, Inc., 2017.