Earned Schedule (ES)

A time-based extension of Earned Value Management that assesses schedule performance in units of time rather than cost.

Key Points

  • ES translates the earned value (EV) into the point in time on the planned value curve where that EV would have been planned.
  • Core indicators: SV(t) = ES - AT (schedule variance in time) and SPI(t) = ES / AT (schedule performance index in time), where AT is the actual time elapsed to the status date.
  • Unlike traditional SPI and SV, ES-based metrics continue to show meaningful schedule performance near project completion.
  • Helps forecast finish dates, assess schedule buffers, and integrate time-focused insights with standard EVM cost metrics.

Example

A project is at week 20 (AT = 20). The earned value achieved to date equals the planned value that was scheduled for week 18. Therefore, ES = 18 weeks. SV(t) = 18 - 20 = -2 weeks (behind schedule), and SPI(t) = 18 / 20 = 0.90.

PMP Example Question

At the status date, AT = 24 weeks and ES = 21 weeks. What is the best interpretation of these results?

  1. The project is 3 weeks under budget.
  2. The project is 3 weeks ahead of schedule.
  3. The project is 3 weeks behind schedule based on time-focused EVM.
  4. The project is performing as planned because SPI is 1.0.

Correct Answer: C — Earned Schedule indicates the work accomplished corresponds to week 21 while 24 weeks have elapsed.

Explanation: SV(t) = ES - AT = 21 - 24 = -3 weeks, showing the project is 3 weeks behind schedule using the Earned Schedule method.

Leadership for Project Managers Course

Lead with clarity, confidence, and real impact. This Leadership for Project Managers course turns day-to-day challenges—unclear priorities, tough stakeholders, and cross-functional friction—into opportunities to guide teams and deliver outcomes that matter.

You’ll learn practical leadership skills tailored to project realities: setting direction without overcontrol, creating alignment across functions, and building commitment even when authority is limited. We go beyond theory with tools you can use immediately—one-sentence visioning, stakeholder influence maps, decision framing, and feedback scripts that actually land.

Expect hands-on frameworks, real-world examples, and guided practice to prepare for tough moments—executive readouts, resistance from stakeholders, and high-stakes negotiations. Downloadable templates and checklists keep everything actionable when the pace gets intense.

Ready to influence without waiting for a bigger title? Join a community of ambitious PMs, sharpen your edge, and deliver with purpose—project after project.



Stop Managing Admin. Start Leading the Future!

HK School of Management helps you master AI-Prompt Engineering to automate chaos and drive strategic value. Move beyond status reports and risk logs by turning AI into your most capable assistant. Learn the core elements of prompt engineering to save hours every week and focus on high-value leadership. For the price of lunch, you get practical frameworks to future-proof your career and solve the blank page problem immediately. Backed by a 30-day money-back guarantee-zero risk, real impact.

Enroll Now