When you create a calculated field, you base the field on an entity (project, business unit, and so on). The entity you select determines the fields that are made available for use in the calculated field.
After you choose the entity the Create Calculated Field wizard appears. The wizard has two screens:
Basic Details - specify data and display type, choose whether the field can be used in reports, determine where the field will appear in the list report field selection screen, and specify whether the field can be used in filters
Formula Editor - build the calculated field, verify and test the formula
You must enter a Title for the calculated field before you can leave the Basic Details screen. The title will be the name of the field on the Field Selection tab for report creation. Once you have entered a title, you can navigate between the two screens in the Calculated Fields wizard.
Before you begin
Things to think about:
When you test your formula you need the ID of an instance of the entity on which the field is based. For example, if you choose a project entity, when you test the formula you need a specific project's ID. You can locate the ID on the project Details page.
Do you want your calculated field displayed in the All Fields folder or the All Common Fields folder in the Create New Report Wizard? You will specify this on the Basic Details screen.
Do you want your calculated field to be available for use in filters? You will specify this on the Basic Details screen.
From the Reports tab, click Calculated Fields and select the entity on which to base the field.