When a key team member, such as the lead design programmer, leaves in the middle of a project, it's a risk that could have been foreseen and for which a contingency plan might have been created. The project manager should consult the risk response plan, which will have strategies or actions outlined for such eventualities. This is a proactive approach to manage the situation without disrupting the project's progress and ensures that the project manager is prepared to handle the loss of critical personnel effectively1.
References: = The importance of having a risk response plan that includes strategies for potential personnel changes is emphasized in PMI's guidelines for risk management. This approach is supported by resources that describe risk response strategies for mitigation, avoidance, transfer, exploitation, enhancement, sharing, and acceptance, which are essential for ensuring positive project outcomes2. Additionally, the role of the change control board is typically to oversee proposed changes to the project plan, not to manage resource allocation or personnel changes3.

A high-visibility project with medium complexity requires careful time management to ensure that the project is delivered on schedule. The project manager should focus on planning, setting deadlines, and monitoring project progress1. Stakeholder engagement is also crucial in this scenario. The project manager needs to communicate effectively with all stakeholders to understand their expectations and keep them informed about the project's progress23. This includes initiating regular status meetings and developing a clear communication protocol4. References: Coursera, The Digital Project Manager, Adobe, Project Central, Microsoft

When a new law is enacted that affects project parameters, the project manager should first assess and prioritize the impact of the new law on the project plan. This involves analyzing how the changes will affect the project scope, schedule, cost, and quality, and determining the necessary adjustments to the project plan.
The assessment should consider the severity of the impact and the urgency of the response required. This approach aligns with the PMBOKGuide's principles of conducting a risk analysis to evaluate the potential effects of an uncertain event or condition on the objectives of the project. It also reflects the PMP's emphasis on adaptive project management, where project managers must be able to respond to changes and dynamic project environments effectively. References: PMBOKGuide and Standards1.

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.

In a virtual team, especially one that is globally distributed, it is crucial for the project manager to establish clear communication protocols and expectations. This includes defining roles and responsibilities, setting up a workable schedule considering different time zones, and respecting cultural observances. This approach ensures that all team members are on the same page and can collaborate effectively, thereby fostering team building. References: PMBOKGuide - Sixth Edition, Section 10.3.2.1: Plan Communications Management