Planned Value (PV) is the amount of work that should be done as on day
Earned Value (EV) is the amount of work that has been accomplished as on day
Actual Cost (AC) is the cost which is incurred as on day to accomplish the work.
Using these parameters one can calculate the variances namely schedule variance (SV) and cost variance (CV) and the performance indices Schedule Performance Index (SPI) and Cost Performance Index (CPI).
SV= EV-PV, CV=EV-AC, SPI=EV/PV and CPI=EV/AC.
Ideally SV & CV should be zero and SPI & CPI should be 1.
If SV is negative then the project behind the schedule and if SV is positive then the project is ahead of the schedule. Similarly, if SPI is less than 1, then the project behind the schedule and if SPI is greater than 1, then the project is ahead of the schedule.
If CV is negative then the project over budget and if CV is positive then the project is under the budget. Similarly, if CPI is less than 1, then the project over budget and if CPI is greater than 1, then the project is under the budget.
Earned Value Management technique is used under the process Control Costs.
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