During a major product upgrade, the project manager learns that resources originally promised to the project are being reassigned to a higher-priority project. What should the project manager do?

When resources are unexpectedly reallocated, the project manager's immediate priority is to understand the consequences for their project. Performing an impact analysis involves assessing how the loss of resources affects the project schedule, budget, scope, quality, and risks. This data is crucial for informed decision-making and communicating the situation to stakeholders. Examining ways of modifying the scope is premature without understanding the full impact. Adopting a resource leveling procedure is not applicable here, as resources are being removed, not just unevenly distributed. Retrieving documentation is a good step for verification but doesn't address the immediate need to understand the impact of the change.