Baselines

Baselines are snapshots of the total actual and planned effort and total actual and planned cost estimates for a project at the moment of capture. They are static. The changes you make to your project after you create your baseline do not affect the current baseline. You explicitly update a baseline to reflect changes to project scope or cost.

You can view baseline cost and work allocation information. Also, you can view other information, such as earned value (EV) and project performance that is most relevant to your project and organization. View the information about the baseline properties page and on the baseline revision properties page.

More information:

Create Baselines

Edit Baselines (Investments)

Update Project Baselines

Update Task Baselines

How Master Project and Subproject Baselines Work

Update and Display of Master Project Baselines

Earned Value Metrics