Cost estimation is a wide open area within the Department of Defence and accurate cost estimating models are a valuable toll in the life cycle costing of a weapon system. This research effort utilized multiple linear regression analysis to develop parametric cost models or cost estimating relationships (CERs) for jet engine depot overhaul costs. Both engine operating parameters, e.g., turbine inlet temperature, RPM, etc., and engine physical characteristics, e.g., length, weight ect., were considered as propable cost drives. Extensive analysis was performed to determine the realibility of the data base. The major finding of this study was that models can be developed with acceptable explanatory power, with respect to variation in the data base, using data of questionable reliability. Thus, a model developed should not be accepted on the basis of explanatory power alone but should be tested further to determine its utility as a cost estimator. (Se)
Development of cost estimating relationship for aircraft jet core-engine overhaul costs
Schaetzung der Kostenrealtionen bei der Ueberholung von Strahltriebwerken
US Government Research Reports ; Sep ; 1-160
1977
160 Seiten
Report
English
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