Organizational downsizing caused a key subject matter expert (SME) to leave a multiyear project. What should the project manager do?

The correct answer is to refer to the resource management plan. This plan outlines how project resources, including human resources like subject matter experts (SMEs), are acquired, managed, and released. It also details procedures for addressing resource shortages or changes, such as when a key team member leaves. The project manager should consult this plan to understand the approved strategies for replacing the SME or mitigating the impact of their departure. Updating the stakeholder register is incorrect because while the SME might be a stakeholder, their departure is primarily a resource issue, not just a stakeholder identification one. Consulting the project sponsor is a good step but should follow reviewing the existing plan for guidance. Modifying the statement of work (SOW) is incorrect as the SOW defines project deliverables and scope, not resource management strategies.