Assume that operations on a work package were expected to cost $1500 to complete the package. They were originally scheduled to have been finished today. At this point, however, we have actually expended $1350, and we estimate that we have completed two-thirds of the work. What are the Cost and Schedule variances? Calculate CPI, SPI, ETC & EAC. Interpret the results (what does it all mean).
1. Cost Variance = Earned Value - Actual Cost
Earned Value = Actual Completion(%) * Budgeted at completion cost
Earned Value = 2/3 * 1500 = $1000
Cost Variance = $1000 - $1350 = - $350
Schedule Variance = Earned Value - Planned Value
Planned Value = Planned completion(%) * Budget at completion cost
Planned Value = 100% * $1500 = $1500
Schedule Variance = $1000 - $1500 = -$500
Interpretation: Since the project cost varianc and project schedule variance both are negative this means that project is over-budget and is behind schedule.
CPI = Earned Value/Actual cost
= $1000/$1350 = 0.74
SPI = Earned Value/Planned Value
= $1000/$1500 = 0.67
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