The project manager should work collaboratively with functional management and team members to agree on a vacation schedule that would have minimal impact on the project schedule. This approach allows for the necessary vacation time while still maintaining project progress and meeting project objectives. It is a proactive approach that involves negotiation and compromise to balance the needs of the project with the needs of the team members. References: Project Management Professional (PMP)Examination Content Outline, June 2015, PMI; A Guide to the Project Management Body of Knowledge (PMBOKGuide) - Sixth Edition, Project Management Institute, Inc., 2017.