CBAP Question 87

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• Chose D1

  BABOK v2 pg 170 Analogous Estimation Use of a similar project as the basis for developing estimates for the current project. It is used when little is known. Analogous estimating is often used to develop a rough order of magnitude (ROM) estimate, and is also known as “top-down” estimating. This is usually done at the beginning of the project or project phase and more detailed estimates follow as more is known.

• Chose D2

  The correct answer is D. Top-down estimate. A top-down estimate is an estimate based on past projects or experiences, where the estimator uses historical data to predict the cost and/or duration of the current project. This approach involves using high-level, overall project metrics from previous projects to estimate the current project's costs and duration. Top-down estimates are often used when there is limited information available about the current project, or when the project is similar to previous projects. The other options are not correct because: - A. Current estimate: This is an estimate based on the current project's specific details and requirements. - B. Past project cost: This refers to the actual cost of a previous project, rather than an estimate. - C. Past estimate: This refers to an estimate made in the past, rather than an estimate based on past projects.

• Chose D1

  D. Top-down estimate A top-down estimate is based on past projects to predict the current cost and/or duration of the current project. It uses high-level information from similar previous projects to estimate the overall cost and schedule​