Schedule Performance Index (Index Performance)

Schedule Performance Index field

A measure of the work accomplished as a percentage of the work scheduled.

Schedule Performance Index (SPI) indicates whether you are meeting earned and planned values within your schedule. You can set performance thresholds for SPI calculated values to determine whether you need to take corrective action.

Calculated as Earned Value of Cost or Quantity divided by Planned Value of Cost or Quantity.

The variance percentage is calculated as Earned Value divided by Planned Value.