What are the three key project status indicators, EV, SV, and CV in earned value project status tracking methodology?

What are the three key project status indicators, EV, SV, and CV in earned value project status tracking methodology? 


Answer: EV is the calculated Earned Value which is used as an indicator of how much the estimated work is completed on a specific date.
SV is a Schedule Variance indicator which shows the difference between efforts of the tasks that have been completed by the status date and the estimated efforts of the tasks that were planned to have been completed by that status date.
CV is a Cost Variance indicator which shows the difference between the estimated efforts of the tasks that have been completed at the status date and the actual efforts expended for the tasks that have been completed at that status date.