📋 PMP Exam Prep

Schedule Performance Index (SPI) measures:

A Cost efficiency
B Schedule efficiency as the ratio of earned value to planned value (EV/PV)
C Quality
D Scope

✓ Correct Answer: Option B

SPI = EV/PV. SPI > 1 = ahead of schedule, SPI < 1 = behind schedule, SPI = 1 = on schedule.

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