CAPM Practice: Demonstrate an understanding of a project management plan schedule

Analogous estimating uses historical data from similar past activities or projects as the basis for current estimates. It is a top-down approach that is faster and less costly than detailed analysis but may be less accurate. It works best when the current activity is truly similar to the historical reference.

**Why not A:** Building a mathematical model based on project parameters describes parametric estimating, which uses statistical relationships between variables. Analogous estimating does not involve mathematical modeling; it directly references actual durations from similar past work.

**Why not C:** Getting input from multiple experts and averaging their estimates describes expert judgment or Delphi technique approaches. While analogous estimating may use expert judgment to adjust historical data, the core technique is based on past project data, not group estimates.

**Why not D:** Estimating each sub-task and rolling up to get the total duration describes bottom-up estimating. This is a detailed, granular approach that works from the lowest level upward, unlike analogous estimating which takes a top-down approach using historical references.