A project baseline can be used to compare your initial project plans, or the state of a project at certain key points as it progresses, to the current state of a project. When you set a baseline for a project in Project Web App, the data in several key task, resource, and assignment fields is captured and saved as a numbered set of baseline data. As your project progresses, you can refer back to that captured baseline data to see how your current data compares.
Note: In some cases, you might not have permission to set a baseline for your project. If you are using Classic Permission Management, your administrator can choose whether to allow users to save protected and/or unprotected baselines. If you do not have permission to set a baseline, an error message appears when you click Set Baseline.
To set a baseline for your project:
Go to Schedule in the Quick Launch, then on the Task tab, in the Editing group, click Set Baseline, and then click the numbered baseline you want to use for the current project data. You can save up to 11 different baseline data sets, including the unnumbered Baseline.
Tip: After a baseline is saved, the date when it was saved is included next to it in the list of baselines that you can choose from when you set a baseline. This can help you choose which numbered baseline to use, and is a good reference for remembering when you last captured a baseline of your project data.
You can also clear baselines that you have previously set.
To clear a baseline for your project:
Go to Schedule in the Quick Launch, then on the Task tab, in the Editing group, click Clear Baseline, and then click the numbered baseline you want to clear.