According to the PMP Exam Study Guide, a subject matter expert (SME) is a person who has specialized knowledge or skills in a particular domain or area. A SME can provide valuable input and guidance on technical, functional, or business aspects of a project. In this scenario, the project manager should consult with a SME to see if the proposed change is acceptable, as it may affect the quality, performance, or functionality of the product or service. The SME can help the project manager to assess the impact of the change, evaluate the alternatives, and make an informed decision. The project manager should not accept, insist, or instruct the vendor without consulting with a SME, as this may lead to poor quality, customer dissatisfaction, or contractual issues. References:
PMP Exam Study Guide, Chapter 9: Project Resource Management, Section 9.1: Plan Resource Management, p. 443 PMP Exam Study Guide, Chapter 12: Project Procurement Management, Section 12.2: Conduct Procurements, p. 535-536 PMP Exam Study Guide, Chapter 13: Project Stakeholder Management, Section 13.3: Manage Stakeholder Engagement, p. 573-574

The best course of action in this scenario is for the project manager to discuss the matter with the team member in confidence. This approach aligns with the principles of effective communication and problem- solving within a team. Addressing the issue privately allows for an open dialogue and provides an opportunity for the team member to explain any obstacles they faced which prevented timely delivery. It also prevents potential embarrassment or defensiveness that could arise from discussing the matter in a public setting, such as a project meeting. This method supports the development of trust and the maintenance of a positive team environment, which are crucial for project success.
: The answer is verified and explained using the principles found in the PMI's foundational standards and guidelines for project management, which emphasize the importance of individual engagement and communication within project teams12. Additionally, the Professional in Business Analysis Reference Materials provide insights into effective communication strategies and the importance of addressing issues directly with the concerned individuals34.

In a global project using a follow-the-sun approach, it is crucial to have effective communication to ensure a smooth handover of tasks and issues between teams in different time zones. Moving working windows to increase overlap allows for real-time communication and collaboration, which can help in addressing and resolving issues more efficiently. This approach aligns with the PMBOK guide's emphasis on effective communication management in projects1.
References:
Project Communications Management According to the PMBOK1
What is the follow the sun model? Advantages + strategy - Zendesk2
What is a follow the sun model in customer support and how do you implement it - TeamSurfboard3 Proactive communication for project managers - Project Management Institute4

When a stakeholder expresses concerns about the project not delivering the expected business value, it is important for the project manager to review the business benefits realization plan. This plan outlines the activities necessary for achieving the planned benefits and identifies the timeline, tools, and resources required to ensure these benefits are fully realized over time. It also includes metrics and procedures to measure progress against benefits, roles and responsibilities, and processes for determining the extent to which each project benefit is achieved prior to formal closure. By reviewing this plan with the stakeholders, the project manager can address concerns by showing how the benefits are expected to be realized and making any necessary adjustments to ensure those benefits are achieved.
The answer is verified using the PMBOK Guide standards, which emphasize the importance of identifying, defining, planning, tracking, and realizing business benefits across an organization12. The Professional in Business Analysis Reference Materials also support the review of the business benefits realization plan as a means to ensure that benefits are derived from project outputs and are sustainable after project completion34.