Transcription of Appendix C: Cost Estimating Methodologies
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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)
Solar Array Cost for System B = 3.4/2.3 * $10M = $14.8M Complexity or adjustment factors can also be applied to an analogy estimate to make allowances for year of technology, inflation, and technology maturation. These adjustments can be made sequentially or separately. A complexity factor usually is used to modify a cost estimate for technical ...
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