How do you add a formula to a KPI scorecard in NetSuite?

To add a formula to a KPI scorecard in NetSuite, you utilize the KPI subtab while in edit mode, where you can select a specific formula type. This approach allows you to define a formula that will calculate values based on existing data fields relevant to the KPI, thereby customizing how you track performance metrics. It ensures that the formula integrates seamlessly into the KPI scorecard's functionality and can reference other metrics directly within the NetSuite environment.

The other options do not accurately represent the method for adding a formula to a KPI scorecard. Using dashboard settings typically involves layout and configuration, not formula creation. Inputting data directly into scorecard fields would not allow for dynamic calculations, as it would only involve fixed values. Importing data from an external source may be relevant for populating data, but it does not pertain to creating a formula for performance monitoring. Thus, the method of using the KPI subtab while in edit mode is the appropriate and correct choice.