When a project manager learns that resources initially promised for a project are being reallocated to another priority project, the best course of action is to perform an impact analysis. This analysis will help understand the effects of the resource reallocation on the current project's schedule, budget, scope, and quality. It is a critical step in project resource management, as it allows the project manager to make informed decisions on how to proceed with the project, whether it involves negotiating for the return of resources, adjusting the project plan, or identifying new resources. The impact analysis is part of the monitoring and controlling process group, where project performance is measured to manage changes to the project scope, schedule, and costs123.
: = The PMBOK guide and other PMP resources which outline the processes involved in project resource management, including the steps to take when resources are reallocated145.