Exam CAPM topic 1 question 344 discussion

Why the other options are incorrect: B. ❌ Common in Agile, compares items relative to one another (e.g., story points) — not algorithm-based or focused on cost. C. ❌ Uses optimistic, pessimistic, and most likely estimates to calculate an average — it's about range-based estimation, not historical algorithmic models. D. ❌ Also uses historical data but does not use algorithms — it’s expert judgment–based, using similar past projects for quick, high-level estimates.

Parametric estimating uses an algorithm or mathematical model to calculate costs or durations based on historical data and project parameters. For example, it might estimate costs based on the cost per unit of work multiplied by the number of units required.

nothing was said about similarity so D can't be correct

There is no mention of using project parameters in the question, it only stated historical data. Thus, D is the answer.

The correct answer is A.

A -Parametric Estimating

A is the correct answer

The correct answer is D: Analogous Estimating