Calculate Schedule Performance Index (SPI)

The Schedule Performance Index (SPI) describes the relationship between the planned schedule and actual schedule. Adobe Workfront calculates SPI at the project and task levels. Project managers review this metric to identify whether tasks or projects are currently tracking ahead of or behind schedule.

Access requirements

You must have the following access to perform the steps in this article:

*To find out what plan, license type, or access you have, contact your Workfront administrator.

Schedule Performance Index (SPI) overview

What the SPI value shows what-the-spi-value-shows

Project managers understand that a SPI value of 1 means the project is on plan or on schedule.  Values greater than 1 indicate a project is ahead of schedule, and values less than 1 mean a project is behind schedule.  The further from 1, the greater deviation from the plan.

How Workfront calculates SPI how-workfront-calculates-spi

Workfront calculates SPI by the following formula:

SPI = (Total Planned Hours x % Complete) / Planned Hours Scheduled to Date*

*If Planned Hours Scheduled to Date = 0, SPI = 1.

Planned Hours Schedule to Date are calculated at the minute when you perform the calculations. It shows the number of Planned Hours planned to the current date. It can be recalculated automatically when you change your finance data to be accurate. There is no field in Workfront that indicates this value.

For example, if you have a project with 1 task and the task has 10 planned hours and a 10-day Duration, the Planned Hours Schedule to Date on the 5th day are 5.

Locate SPI in a project or task