Due to delays on some activities one of the project team members has increased the...

 The project manager should evaluate the impacts of the changes that were made to the project without any approval. This is because any change in the scope can affect the other project constraints, such as time, cost, quality, risk, and stakeholder satisfaction. The project manager should use the change management plan and the integrated change control process to assess the impacts of the changes, determine the appropriate actions, and obtain the necessary approvals. The project manager should also communicate with the project team member who made the changes and explain the importance of following the change control procedures. The project manager should not remove the changes without evaluating them, as they may have some value or benefit for the project. The project manager should not add team members to the project without analyzing the resource requirements and availability. The project manager should not update the project documentation with the new scope without validating and approving the changes. References: (Professional in Business Analysis Reference Materials source and documents)

PMBOK® Guide, 6th edition, Section 4.6, pp. 129-131

PMI Professional in Business Analysis (PMI-PBA)® Examination Content Outline, Domain IV: Traceability and Monitoring, Task 3, p. 13

Business Analysis for Practitioners: A Practice Guide, Section 5.4.2, p. 118