1. What Is The Earned Schedule?

The Earned Schedule (ES) is a project management metric that translates earned value into time units, providing a more intuitive measure of schedule performance than traditional earned value management.

2. How Does The Calculator Work?

The calculator uses the Earned Schedule equation:

Where:

• \( ES \) — Earned Schedule (time units)
• \( C \) — Time period index where \( PV_c \leq EV < PV_{c+1} \)
• \( EV \) — Earned Value ($)
• \( PV_c \) — Planned Value at time period C ($)
• \( PV_{c+1} \) — Planned Value at next time period ($)

Explanation: The equation calculates how much of the schedule has been earned based on the project's financial performance.

3. Importance Of Earned Schedule Calculation

Details: Earned Schedule provides a more accurate measure of schedule performance than schedule variance in cost terms, helping project managers better predict project completion dates.

4. Using The Calculator

Tips: Enter EV, PVc, and PVc+1 in dollars. All values must be positive, and PVc+1 must be greater than PVc for a valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between ES and traditional schedule variance?
A: While schedule variance measures in cost units, ES translates performance into time units, making it easier to understand schedule impacts.

Q2: How is the time period index C determined?
A: C is the largest integer such that PVc ≤ EV. The calculator typically starts with C=0 for the initial calculation.

Q3: What are typical ES values?
A: ES should ideally match the actual time elapsed. ES less than actual time indicates schedule delay.

Q4: Can ES be negative?
A: No, ES represents earned time and should always be a positive value or zero.

Q5: How frequently should ES be calculated?
A: ES should be calculated at regular reporting intervals (weekly/monthly) to track schedule performance trends.