According to the Project Management Professional (PMP) principles, when transitioning from a predictive to an iterative approach, it's crucial to maintain clear and transparent communication about project requirements and changes. This is often achieved through the use of product and sprint backlogs, which should be well- documented and visible to all team members. If the team is unsure of what needs to be done due to changes requested by the product owner, it indicates that the backlogs may not be adequately maintained or visible to the team. Therefore, the project manager should ensure that these backlogs are properly documented and accessible to the team. References: Project Management Professional (PMP) Certification Handbook, PMBOK Guide (6th Edition), Chapter 3: Project Management Processes for a Project, Section 3.8 Closing Process Group. Professional in Business Analysis (PMI-PBA) Handbook, Chapter 2: Needs Assessment.