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What is the difference between TSPI and SPI?

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I've just saw someone mentioning TSPI, which apparently stands for Total Schedule Performance Index, but what does it differ from the normal SPI that we all know?
asked 8 years ago by anonymous

1 Answer

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I think you mean TCSPI, there is no such thing as TSPI.

TCSPI stands for To Complete Schedule Performance Index.

The difference between TCSPI and SPI is the following:

- TCSPI and SPI are calculated differently, here are the formulas:
    * TCSPI = (BAC - BCWP) / (BAC - BCWS)
    * SPI = BCWP / BCWS

- From the formula above, if TCSPI goes above 1, then SPI goes below 1 (and the other way around). This means that if TCSPI is above 1, then the project is behind schedule.

TCSPI is meaningless and I've never seen it used.
answered 8 years ago by humblepm (17,390 points)

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