CompTIA Project+ (PK0-005)Project Life Cycle PhasesMedium
A project manager is reviewing the project's progress. The Earned Value (EV) is $80,000, the Planned Value (PV) is $75,000, and the Actual Cost (AC) is $85,000. What is the Schedule Performance Index (SPI), and what does it indicate?
- ASPI = 0.94, The project is over budget.
- BSPI = 0.94, The project is behind schedule.
- CSPI = 1.06, The project is ahead of schedule.
- DSPI = 1.06, The project is under budget.
Show answer & explanationAnswer & explanation
Correct answer: C. SPI = 1.06, The project is ahead of schedule.
The Schedule Performance Index (SPI) is calculated as EV / PV. In this case, $80,000 / $75,000 = 1.066. An SPI greater than 1.0 indicates that the project is ahead of schedule.
Why the other options are wrong
- A. This calculates Cost Performance Index (CPI) and misinterprets SPI.
- B. Incorrect calculation and interpretation of SPI.
- D. This is SPI but describes cost performance, which is CPI.
Schedule Performance Index (SPI)
A measure of schedule efficiency, expressed as the ratio of earned value to planned value (EV/PV).
- SPI > 1.0 means ahead of schedule.
- SPI < 1.0 means behind schedule.
- SPI = 1.0 means on schedule.
Memory trick: SPI: 'S'chedule 'P'rogress 'I'ndex is EV over PV, like 'E'arly 'V'ictory over 'P'lanned 'V'isits.