Question:

Which of the following performance metrics measures project performance against the project scope?

A. Schedule Performance Index
B. Cost Performance Index
C. Cost Variance
D. No metric is used

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Hint: SPI is Schedule Performance Index, CPI is Cost Performance Index.

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Answer and Explanation:

The Correct Answer is D.

SPI is Schedule Performance Index, CPI is Cost Performance Index. None of these metrics measure the project performance against the project scope.
In fact, there is no metric mentioned whatsoever in the PMBOK Guide that measures this kind of performance. The performance can be measured against the scope baseline but there is no metric for doing so. The question is trying to trick you.