Schedule Performance Index (SPI) Calculator
SPI shows how efficiently you’re using time against the plan. SPI below 1.0 means the project is behind schedule.
SPI Calculator
Formula
SPI = EV ÷ PV • SPI > 1.0 → ahead of schedule • SPI < 1.0 → behind schedule
Tools that help you protect schedule performance
Teams that consistently track schedule performance usually rely on software with strong planning, dependency management, and real-time reporting. Explore our best project management tools for 2026 to compare options side-by-side.