For controlling projects, the Schedule Performance Index (SPI) equals the cost of the work that was scheduled to have been completed by a particular date based on the original budget and project plan.

Question

Quizplus · Accepted Answer

The Schedule Performance Index (SPI) is a measure of schedule efficiency expressed as the ratio of Earned Value (EV) to Planned Value (PV), not the cost of work scheduled.

For Controlling Projects, the Schedule Performance Index (SPI) Equals the Cost