The Schedule Performance Index (SPI) is a measure used in project management to assess how well a project is adhering to its planned schedule. It is calculated by dividing the Earned Value (EV) by the Planned Value (PV), with a result greater than 1 indicating that the project is ahead of schedule, while a result less than 1 indicates it is behind schedule. SPI serves as a vital tool for monitoring progress and making informed decisions about resource allocation and project adjustments.
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