? Schedule Variance (SV%)

Written by Priya Nair Reviewed by Vikram Sen Last updated: January 11, 2026 Last verified: June 1, 2026 · Methodology · Accuracy policy

The schedule variance calculator on this page uses one primary formula—enter values using the form labels (rate, base, part, or whole) that match your problem statement..

schedule variance: use the form labels and formula on this page—confirm part vs whole before you calculate.

Are you ahead or behind the time baseline? Compare earned value (work truly finished at planned rates) with planned value (what the schedule expected by this date). The percent schedule variance shows how far ahead or behind you are relative to PV—not dollars of overspend.

Pair with SPI for the efficiency ratio and with cost variance when the question is budget burn instead of calendar slip.

Enter EV and PV below. For everyday checklist progress, use task completion.

Schedule Variance (SV%)

Understanding Schedule Variance

What is Schedule Variance?

Schedule Variance (SV) measures whether a project is ahead or behind schedule in dollar terms. Part of Earned Value Management (EVM).

SV > 0: Ahead of schedule
SV = 0: On schedule
SV < 0: Behind schedule

The Formula

Schedule Variance

SV = Earned Value (EV) - Planned Value (PV)

Worked Example

Scenario: Planned $100K work by today, completed $85K worth.

Step 1: EV = $85,000, PV = $100,000

Step 2: SV = $85,000 - $100,000 = -$15,000

SV = -$15,000 (behind schedule)

Pro Tips

Use with SPI: SV in $ + SPI as ratio gives full picture
Early action: Negative SV rarely improves on its own
Track weekly: Catch schedule slips early

Schedule Variance in Earned Value Management

Schedule Variance (SV) measures project timeline performance by comparing earned value to planned value. Unlike simple deadline tracking, SV provides a monetary view of schedule performance, enabling comparison across projects of different sizes.

Interpreting Schedule Variance

SV > 0 (Positive): Ahead of schedule. More value earned than planned by this date.
SV = 0: Exactly on schedule. Planned and actual progress align perfectly.
SV < 0 (Negative): Behind schedule. Less work completed than planned.

SV Limitations and Best Practices

Schedule Variance has a known limitation: it always converges to zero at project end, regardless of how late the project finishes. For this reason, experienced project managers use SV alongside percent complete metrics and critical path analysis. The Schedule Performance Index (SPI) provides a ratio view that's often more intuitive for stakeholders.

Pro tip: Track SV weekly, visualize trends, and investigate root causes when SV drops below -5%.

Common schedule variance mistakes

Mixing SV with SPI: Schedule variance is EV − PV; SPI is EV ÷ PV.
Calendar vs work days: Align PV and EV to the same time unit (days or hours).
Scope changes: Re-baseline PV when scope shifts or SV trends mislead.

❓ Frequently Asked Questions

How do you interpret schedule variance (SV) in project tracking?

Schedule Variance = Earned Value - Planned Value. Positive SV means ahead of schedule.

How do I interpret schedule variance?

SV > 0: Ahead. SV = 0: On schedule. SV < 0: Behind schedule.

What is the relationship between SV and SPI?

SPI = EV / PV gives efficiency ratio. SV gives absolute variance.

🔍 Authoritative References

For more information about professional and project management calculations, consult these trusted sources:

Project Management Institute - Project management standards and best practices
OSHA - Workplace safety standards and guidelines
ISO Standards - International quality and process standards