ISEB-PM1 · Question #501
Which of the following equations is used to calculate schedule variance?
The correct answer is C. EV-PV. Schedule Variance (SV) = EV − PV, meaning you subtract what you planned to accomplish (Planned Value) from what you actually accomplished (Earned Value). A positive result means you're ahead of schedule; a negative result means you're behind. Why the distractors are wrong: A…
Question
Which of the following equations is used to calculate schedule variance?
Options
- AEV/PV
- BPV/EV
- CEV-PV
- DPV-EV
How the community answered
(45 responses)- A2% (1)
- B7% (3)
- C78% (35)
- D13% (6)
Explanation
Schedule Variance (SV) = EV − PV, meaning you subtract what you planned to accomplish (Planned Value) from what you actually accomplished (Earned Value). A positive result means you're ahead of schedule; a negative result means you're behind.
Why the distractors are wrong:
- A (EV/PV) is the Schedule Performance Index (SPI) - a ratio, not a variance.
- B (PV/EV) is simply SPI inverted; it's not a standard EVM formula at all.
- D (PV−EV) flips the operands, giving you the opposite sign - you'd incorrectly show a positive number when behind schedule.
Memory tip: Think "Earned comes first, Planned follows" - just like progress comes before planning on a timeline. The word variance always means subtraction (not division), which eliminates A and B immediately.
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