CAPM (Certified Associate in Project Management) Practice Exam

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What characterizes bottom-up estimating?

Aggregating estimates from top-level project tasks
Estimating by using historical data
Estimating project duration or cost by aggregating lower-level components
Using expert judgment to estimate resources

The correct answer is: Estimating project duration or cost by aggregating lower-level components

Bottom-up estimating involves estimating project duration or cost by aggregating lower-level components. This technique breaks down the project into smaller, more manageable components, allowing for a more accurate and detailed estimation. By estimating the individual components and then rolling them up to get the total project estimate, this method is known for its accuracy and granularity in project estimation. On the other hand: A. Aggregating estimates from top-level project tasks is more characteristic of top-down estimating, not bottom-up estimating. B. Estimating by using historical data is a different estimation technique known as analogous estimating. D. Using expert judgment to estimate resources is a common input in various estimating techniques, but it is not a specific characteristic of bottom-up estimating.