Scope baseline is referred to as the approved version of a scope statement, work breakdown structure (WBS), and its associated WBS dictionary, that can be changed only through formal change control procedures and is used as a basis for comparison. Project management plan is the document that describes how he project will be executed, monitored, and controlled.
It integrates and consolidates all of the subsidiary plans and baselines from the planning processes including scope baseline, along with schedule baseline and cost baseline. When closing the project, the project manager reviews all prior information from the previous phase closures to ensure that all project work is completed and that the project has met its objectives. Since project scope is measured against the project management, the project manager reviews the scope baseline to ensure completion before considering the project closed.
Control scope is the process of monitoring the status of the project and product scope and managing changes to the scope baseline. The key benefit of this process is that it allows the scope baseline to be maintained throughout the project. The scope baseline is compared to actual results to determine if a change, corrective action, or preventive action is necessary.
This term is defined in the 5th edition of the PMBOK.