Appendix C: Cost Estimating Methodologies

NASA cost Estimating Handbook Version Appendix C cost Estimating Methodologies C-1 February 2015 Appendix C: cost Estimating Methodologies The cost estimator must select the most appropriate cost Estimating methodology (or combination of Methodologies ) for the data available to develop a high quality cost estimate. The three basic cost Estimating methods that can be used during a NASA project s life cycle are analogy, parametric, and engineering build-up (also called grassroots ) as well as extrapolation from actuals using Earned Value Management (EVM). This Appendix provides details on the following three basic cost Estimating methods used during a NASA project s life cycle: Analogy cost Estimating Parametric cost Estimating Simple Linear Regression (SLR) Models Simple Nonlinear Regression Models Multiple Regression Models (Linear and Nonlinear) Model Selection Process Summary: Parametric cost Estimating Engineering Build-Up cost Estimating (also called Grassroots ) Estimating the cost of the Job Pricing the Estimate (Rates/Pricing) Documenting the Estimate Basis of Estimate (BOE) Summary: Engineering Build-Up cost Estimating For additional information on cost Estimating Methodologies , refer to the GAO cost Estimating and Assessment Guide at NASA cost Estimating Handbook Version Appendix C cost Estimating Methodologies C-2 February 2015 Figure C-1 shows the three basic cost Estimating methods that can be used duri

Appendix C Cost Estimating Methodologies C-2 February 2015 Figure C-1 shows the three basic cost estimating methods that can be used during a NASA project’s life cycle: analogy, parametric, and engineering build-up (also called “grassroots”), as well as extrapolation from actuals using Earned Value Management (EVM). Figure C-1.

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