Schedule Variance (SV)

Schedule variance (SV) measures the difference between work completed and work scheduled, using the formula SV = EV minus PV. Positive means ahead of schedule, negative means behind.
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By Brett Helling

How Schedule Variance Works

Schedule variance is an earned value metric that expresses how far ahead or behind schedule a project is in dollar terms. The formula is SV = EV minus PV. A positive SV means the project is ahead of schedule: more work has been completed than planned. A negative SV means the project is behind schedule: less work is done than the plan called for at this point. An SV of zero means the project is exactly on schedule.

SV expresses schedule deviation in dollar terms, which can feel counterintuitive (schedule is usually measured in days or weeks, not dollars). The dollar value represents how much budgeted work is ahead or behind. A negative SV of $20,000 means $20,000 worth of planned work has not yet been completed.

How to Calculate SV

SV = EV minus PV. Example: At Month 3, the baseline says $120,000 of work should be complete (PV = $120,000). The team has completed work budgeted at $105,000 (EV = $105,000). SV = $105,000 minus $120,000 = negative $15,000. The project is behind schedule by $15,000 worth of planned work.

When to Use SV vs SPI

Use SV when communicating the magnitude of a schedule gap in terms stakeholders can relate to budget conversations. Use SPI for trend analysis and efficiency comparisons across time periods. Like CV and CPI, SV gives magnitude while SPI gives rate.

SV shares the same convergence limitation as SPI: it approaches zero as the project nears completion regardless of how late the project is. This makes SV most reliable in the first half of the project. For late stage schedule analysis, use critical path slack and SPI(t).

When SV Is Less Useful

SV does not tell you which tasks are behind or whether the delay affects the critical path. A negative SV could result from delays on non critical tasks (no impact on end date) or delays on the critical path (project end date at risk). Pair SV with critical path analysis to determine the actual schedule risk.

Commonly Confused With

TermKey Difference
SPI (Schedule Performance Index) SV is an absolute dollar amount (EV minus PV). SPI is a ratio (EV / PV). SV shows how much work is ahead or behind. SPI shows the rate of schedule efficiency.
Cost Variance (CV) → SV measures schedule deviation (EV minus PV). CV measures cost deviation (EV minus AC). Both use EV but compare it to different baselines.
Schedule Slip Schedule slip is measured in time units (days, weeks). SV is measured in dollar terms. A negative SV of $20,000 means $20,000 worth of planned work is not yet complete, but does not directly indicate how many days late the project is.
Compare baseline to actual progress in Gantt View and visualize SV trends on Dashboard charts.
Monitor Schedule Variance in ClickUp

Common Questions About Schedule Variance (SV)

What is the schedule variance formula?
SV = EV minus PV. Earned Value (budgeted cost of work completed) minus Planned Value (budgeted cost of work scheduled). A positive result means ahead of schedule. A negative result means behind schedule.
Why is schedule variance measured in dollars instead of days?
EVM expresses all metrics in dollar terms because the underlying data is the budgeted cost of work packages. SV in dollars tells you how much planned work is outstanding. To convert to time, divide the SV by the planned daily burn rate, though this is an approximation.
Does a negative SV always mean the project end date is at risk?
Not necessarily. SV measures overall work accomplishment versus plan. If the delayed work is on non critical path tasks, the end date may not be affected. Always pair SV with critical path analysis to determine whether the schedule variance threatens the final deadline.