Earned Value Analysis

What is Earned Value analysis?
Understanding EVA (Earned value Analysis) is very important for Project success. Earned Value Metrics provide a common set of parameters and benchmarks against which a project progress can be mapped. This is mostly used during the Control and execution phase of the project. The metrics help indicate whether the project is on track or not.

Earned Value Metrics is a set of indicators that help in tracking and measuring certain parameters against a certain baseline which would help us in defining or visualizing whether a project is successful or not.

Advantages:
Along with this, other advantages of using Earned Value Analysis in project management are,
- Accurate  reporting of project logistics to PMO and project sponsors
- Early warning to Project Managers so they can take corrective actions by performing risk analysis, if a project starts going over budget or behind schedule

The 2 key elements that guide or help to trend a project are,
- Project Cost
- Project schedule
In order to calculate earned value on any project large or small, first the Project Manager has to define the WBS (Work breakdown structure), define the smallest level of activity schedule and cost and this forms the Project baseline (or planned value) against the project actuals (or AV) can be compared to calculate the earned value variances and indices.

Terminology:
Certain acronyms that will help us in understanding EVM are
PV = Planned Value = The Budgeted amount allocated for a certain scheduled work activity until the current point in time =Also known as Budgeted cost of work scheduled (BCWS)
e.g. For a web based project (say), we need to create a screen
This requires (say) 1 resource for 40 hours (@ $100/Hr), so the PV for this task is $4000 (for 40 hours of work)

AC = Actual Cost = Total Cost for the work that was performed=Also known as Actual Cost of Work Performed (ACWP)
e.g: In the above example assume it took 1 res 10 hours to complete 30% of the work
AC=10*100=$1000

BAC = Budget at completion i.e. Originally budgeted amount for the project i.e baseline cost
e.g. In the above case assume baseline cost is $4000

So based on this, we can track the project performance as follows,
EV = Earned value = BAC*Percent of Project completed=This indicates How much of budget should have been spent for the amount of work done so far.
e.g. EV=4000*0.3=1200

Cost variance = CV = EV - AC = This helps to determine project performance wrt cost/budget
e.g. CV=1200 - 1000 = 200 (NOTE: Positive variance is better than negative)

Schedule variance = SV = EV - PV=This helps to determine the project performance wrt schedule
e.g. SV=1200-4000=-2800 (NOTE: Positive variance is better than negative)

Cost Peformance Index = CPI = EV/AC= This index helps to understand how $ spent performs wrt planned cost
e.g.CPI = 1200/1000=1.2  (NOTE: Index closer to 1 indicates we are closer to baseline)

Schedule performance Index = SPI = EV/PV = This index helps us understand whether we are ahead or behind schedule
e.g. SPI=1200/4000=0.3 (NOTE: Index closer to 1 indicates we are closer to baseline)

Estimate at completion = EAC = AC + (BAC - EV) = Indicates what should be the final cost at any point in the project
e.g. EAC = 1000 + (4000 - 1200) = 3800

Estimate to Complete = ETC = EAC - AC = Indicates how much will it cost you to complete the project based on the current status
e.g. = 3800 - 1000 = 2800

They key concept here is how to calculate the "Value" of the work that is completed. There are various schools of thought to support this
1> Some consider 50% value reached when 50% of work is completed
2> Some consider 30% value reached when 70% of work is completed and then remaining 70% of value is realised when rest 30% of work achieved
3> Some consider 0% value reached till all 100% of work is completed

These metrics provide lot of insight as to the project progress. This can be mapped and managed using simple excel sheets provided we have the baseline calculated. This metrics analysis system will also account for scope, schedule changes and resource change. Those can be fit into the timeline