Free PMI Project Management Professional Practice Question

A project activity has an Early Start (ES) of Day 5 and a duration of 4 days. What is the Early Finish (EF) for this activity?

Day 10
Day 7
Day 9
Day 8

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Answer Description

The correct answer is Day 8. To calculate the Early Finish (EF) of an activity, we use the formula: EF = ES + Duration - 1. In this case, we have ES = 5 and Duration = 4. Plugging these values into the formula, we get:

EF = 5 + 4 - 1 = 8

It's important to note that we subtract 1 from the result because the activity starts on Day 5 and ends on Day 8, which is a total of 4 days. If we didn't subtract 1, we would incorrectly count 5 days instead of 4.

The other answers are incorrect because:

Day 9 would result from not subtracting 1 in the formula (5 + 4 = 9).
Day 7 would be the result if the duration was 3 days instead of 4.
Day 10 is simply incorrect and doesn't follow any logical calculation.

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What is Early Start (ES) and how is it determined?

Why do we subtract 1 in the Early Finish (EF) calculation?

What are the implications of using incorrect Early Finish (EF) values?

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