Earned Value (EV)

Earned value is the budgeted cost of work actually completed to date on a project, used with planned value and actual cost to calculate schedule and cost variance for objective in-flight performance measurement.

The term originates from earned value management (EVM), a project control discipline that replaces subjective progress assessments with a consistent numerical framework.

The three core values

Earned value analysis uses three figures, all expressed in currency or budget hours:

Planned Value (PV). The budgeted cost of work scheduled to be complete by the measurement date. PV is read from the approved project plan and represents what should have been accomplished.

Earned Value (EV). The budgeted cost of work actually completed by the measurement date. EV is calculated by multiplying the percentage of each task completed by its budgeted cost. A task budgeted at $10,000 that is 60 percent complete has an EV of $6,000.

Actual Cost (AC). The real cost incurred to accomplish the work measured by EV, including labor, materials, and expenses.

These three values come from different sources: PV from the work breakdown structure and schedule, EV from completion reporting, and AC from timesheets and expense records.

Schedule and cost variance

Two variances surface the project’s performance:

Schedule Variance (SV) = EV minus PV. A positive SV means more work has been completed than planned. A negative SV means the project is behind schedule.

Cost Variance (CV) = EV minus AC. A positive CV means the completed work cost less than budgeted. A negative CV means cost overrun: the work completed has cost more than its budget allowed.

Both variances can be expressed as performance indices for easier comparison across projects of different sizes. The Schedule Performance Index (SPI) is EV divided by PV; the Cost Performance Index (CPI) is EV divided by AC. An index below 1.0 indicates underperformance; above 1.0 indicates ahead of plan.

Forecasting completion

Earned value feeds forward-looking estimates. The Estimate at Completion (EAC) projects the total cost of the project based on current performance, and the Estimate to Complete (ETC) projects the remaining cost. These replace intuitive guesses with calculations rooted in observed performance.

If the CPI is 0.85, the project is spending $1.18 for every $1.00 of planned work completed. Projecting that rate forward gives a statistically grounded EAC rather than an optimistic assumption that performance will improve.

Practical application in professional services

Full EVM as defined in government contracting standards is rarely implemented in its entirety in commercial PS engagements. The core concepts are widely used in a simplified form:

• Comparing hours earned (by milestone or task completion) against hours planned at the same date reveals schedule slippage before it appears in a status report.
• Comparing hours burned against hours earned reveals whether the team is working more hours than the task warrants, signaling potential cost overrun.
• Tracking EV at each milestone creates an objective gate: the milestone is either complete (full EV credited) or not.

The primary alternative, percent-complete estimating, relies on the delivery team’s self-assessment, which is subject to optimism bias. EV substitutes a completion-based trigger for a subjective judgment.

Budget burn reports, which show costs incurred against the total budget, capture the AC side of the equation but omit the EV. Without knowing what work has actually been completed, a burn report cannot distinguish a project that is on track from one that is behind schedule but has spent the same amount.