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S › Schedule Performance Index (SPI)

COV ITRM Glossary

Schedule Performance Index (SPI)


(Context: General)

The measure of schedule efficiency on a project. IT is the ratio of earned value (EV) to planned value (PV). The SPI = EV divided by PV. An SPI equal to or greater than one indicates a favorable condition and a value of less than one indicates an unfavorable condition.



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