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Discussion in 'Project Management' started by _6592, Jun 24, 2017.
This thread is created for people who are attending Sridhar's PMP class started on June 10th.
Guys, why do we need SPI and CPI when we are already having variances ( SV and CV ) to measure the performance of the project or progress of the project , Like variances , indexes also help you analyze the performance of the project....
Satish, SPI and CPI represent the variance as a percentage rather than just value. SV and CV simply show how much the project is off in schedule/cost. However, the variance alone does not show how big this is relative to the size of the project. This is where SPI and CPI are important. A variance of $20,000USD on a $30,000USD project is much bigger than a $20,000USD variance on a $5,000,000USD project. SPI and CPI make the variance relative (as a ratio) to the total size of the project.