Which is one of the determining factors used to calculate CPI?

The correct answer is A. EV. EV (Earned Value) is a direct input to the CPI formula: CPI = EV ÷ AC (Earned Value divided by Actual Cost). Without EV, you cannot compute CPI, making it a determining factor by definition. Why the distractors are wrong: B. SPI (Schedule Performance Index = EV ÷ PV) measures…

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AEV
BSPI
CPV
DETC

How the community answered

(31 responses)

A
84% (26)
B
3% (1)
C
6% (2)
D
6% (2)

Explanation

EV (Earned Value) is a direct input to the CPI formula: CPI = EV ÷ AC (Earned Value divided by Actual Cost). Without EV, you cannot compute CPI, making it a determining factor by definition.

Why the distractors are wrong:

B. SPI (Schedule Performance Index = EV ÷ PV) measures schedule efficiency, not cost - it's a separate performance index that doesn't feed into CPI.
C. PV (Planned Value) is used in SPI and variance calculations, but not in the CPI formula.
D. ETC (Estimate to Complete) is a forecasting metric for remaining work - it's derived from CPI, not used to calculate it.

Memory tip: Think of CPI as "Did I get my money's worth?" - you compare what you earned (EV) against what you actually spent (AC). The formula is simply EV over AC, so EV is always in the CPI calculation.

Topics

#CPI#earned value management#EV#cost performance index

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