ISACA Certified Information Systems Auditor (CISA) ExamDomain 3: Information Systems Acquisition, Development and ImplementationMedium
An IS auditor is evaluating the project management practices for a new data analytics platform. The project is 50% complete according to the work breakdown structure (WBS), has spent $150,000, and was budgeted for $200,000 at this stage. The total project budget is $400,000. What is the Schedule Performance Index (SPI) for this project?
- A0.75
- B1.00
- C1.33
- D0.80
Show answer & explanationAnswer & explanation
Correct answer: B. 1.00
The Schedule Performance Index (SPI) is calculated as Earned Value (EV) divided by Planned Value (PV). The project is 50% complete, meaning EV is 50% of the total budget ($400,000 * 0.50 = $200,000). The Planned Value at this stage was also $200,000. Therefore, SPI = $200,000 / $200,000 = 1.00.
Why the other options are wrong
- A. This would be the Cost Performance Index (CPI) if EV was $150,000 and AC was $200,000, but the question asks for SPI.
- C. This calculation is incorrect and implies the project is ahead of schedule when it is exactly on schedule.
- D. This calculation is incorrect for SPI.
Schedule Performance Index (SPI)
A measure of project schedule efficiency, calculated as the ratio of Earned Value (EV) to Planned Value (PV).
- SPI > 1 indicates ahead of schedule.
- SPI < 1 indicates behind schedule.
- SPI = 1 indicates on schedule.
Memory trick: SPI: See Progress, Is it on time?