Unmanaged change occurs when a project deviates from its planned scope. It's also known as variance. It can negatively impact the budget and schedule, or cause a project to fail in meeting its objectives. The Control Scope process helps you detect unmanaged change, find ways to resolve it, and limit its impact on the project. You use managed change to correct scope creep, or adjust the scope via a change request, which can arise during daily monitoring. Generally, project managers and sponsors reject all requests by default at this point in the project, unless the change has a proven benefit. The Control Scope process ensures that only beneficial changes are approved.