According to the PMBOK Guide, the project manager is responsible for managing the project work and ensuring that the project objectives are met. One of the processes in the project management process group is Monitor and Control Project Work, which involves tracking, reviewing, and reporting the progress and performance of the project, as well as identifying and resolving issues. The project manager should use the issue log, a project document that records and tracks the issues that arise during the project, to document the issue of the missing notification and assign it to the appropriate project team member(s) for resolution. The project manager should also communicate the issue to the relevant stakeholders and update the project management plan and other project documents as needed. The project manager should not close out the project until the issue is resolved and the system migration is completed for all departments, as this would compromise the quality and scope of the project deliverables. The project manager should also not escalate the issue to the project sponsor and upper management, as this would indicate a lack of control and responsibility for the project. The project manager should also not report the issue during the next status meeting at the end of the week, as this would delay the resolution and potentially cause more problems for the project. The project manager should act promptly and proactively to address the issue and ensure the project is closed successfully. References: (Professional in Business Analysis Reference Materials source and documents) PMBOK Guide, 6th edition, Chapter 4: Project Integration Management, Section 4.6: Monitor and Control Project Work, p. 123-127 PMBOK Guide, 6th edition, Appendix X1: Agile, Iterative, Adaptive, and Hybrid Project Environments, Section X1.5.2: Issue Log, p. 715 Business Analysis for Practitioners: A Practice Guide, Chapter 5: Traceability and Monitoring, Section 5.3:
Monitoring the Performance of Business Analysis Work, p. 143-144
The PMI Guide to Business Analysis, Chapter 7: Solution Evaluation, Section 7.3: Assess Solution Limitations, p. 373-374

When managing a global program with distributed teams, videoconferencing is the most effective means of team interaction. It allows for visual communication, real-time collaboration, enhanced engagement, and relationship building. Videoconferencing enables team members to see each other, which is crucial for non- verbal communication cues such as facial expressions and body language. This enhances understanding and rapport among team members. Real-time collaboration is facilitated, allowing for discussions, screen sharing, and document collaboration simultaneously. Engagement is maintained by creating a sense of presence and connection, reducing distractions, and encouraging active participation. Building relationships is also vital, especially when working with distributed teams, as it helps mitigate challenges of cultural differences and time zone variations.
References: (PMI-PMP: How should the project teams interact in their meetings? - PUPUWEB1)

In a situation where a developer is delaying a critical path activity due to a lack of understanding of customer requirements, the project manager should facilitate communication to ensure clarification of the requirements.
This approach aligns with the best practices in project management and business analysis, which emphasize the importance of clear communication and understanding of stakeholder requirements for project success. By clarifying the requirements, the developer can gain a better understanding of what is expected and proceed with the coding activity, thus mitigating the delay on the critical path.
References:
* PMI's Guide to the Project Management Body of Knowledge (PMBOKGuide) emphasizes the importance of stakeholder engagement and effective communication to ensure that project requirements are understood and met1.
* The PMI Professional in Business Analysis (PMI-PBA)highlights the role of communication in business analysis, including the need for clarity and the avoidance of misunderstandings23.
* Discussions among PMP professionals also suggest that once a root cause analysis is performed and the issue is identified, the next step is to address the issue directly, which in this case involves clarifying the requirements1.

Major team conflict requires fast, interactive, two-way communication to surface concerns, correct misunderstandings, and reach agreement. A real-time conversation-such as a conference call (A)-allows immediate clarification, tone management, and collaborative problem-solving, which is far more effective than one-way channels. Email (C) is easily misinterpreted, can escalate emotions, and delays resolution.
Progress reports and risk registers (D) are informational artifacts and do not resolve interpersonal issues.
Individual meetings (B) can be useful in some situations (e.g., sensitive one-on-one coaching), but for a conflict affecting the team and requiring quick resolution, a facilitated group discussion is usually the best first move to align everyone on facts, expectations, and next steps. The project manager can set ground rules, keep the discussion focused on issues (not personalities), and drive toward a workable agreement. Using direct, synchronous communication supports faster resolution, protects team performance, and restores collaboration needed to meet project objectives.