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Schedule Performance Index (SPI) over 1

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My project is already behind schedule, but everytime I calculate the SPI of this project, I get 1.07, which means that the project is ahead of schedule. I don't understand how is this possible... I'm sure I'm doing the calculation correctly - could it be that I have misunderstood the concept and an SPI over 1 is actually a bad thing and not a good thing? (it's my first project!)
asked 7 years ago by anonymous

1 Answer

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SPI over 1 means that your project is ahead of schedule, which is a good thing. So this means that most likely there is something wrong in your calculation.

The calculation of the Schedule Performance Index is described in details here: http://www.projectmanagementquestions.com/1484/how-to-calculate-the-schedule-performance-index

In short SPI = Earned Value / Planned Value

One question, how do you know that your project is behind schedule although the main metric (SPI) is pointing that it's ahead of schedule. In other words, which metric, other than SPI, are you using to measure the performance of your project?

Again, I think either you made a mistake in your calculation, or that your project is really ahead of schedule!
answered 7 years ago by MaplePM (46,940 points)

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