Bottom-Up Estimating

Bottom-Up Estimating is a method of estimating project duration or cost by aggregating the estimates of the lower-level components of the work breakdown structure (WBS). See also analogous estimating, parametric estimating, program evaluation and review technique (PERT), and three-point estimating.

Definition

According to the PMI Lexicon of Project Management Terms,

Bottom-Up Estimating. A method of estimating project duration or cost by aggregating the estimates of the lower-level components of the work breakdown structure (WBS). See also analogous estimating, parametric estimating, program evaluation and review technique (PERT), and three-point estimating.