Date of Award

9-1991

Document Type

Thesis

Degree Name

Master of Science in Cost Analysis

First Advisor

Roland Kankey, PhD

Abstract

This thesis covers three objectives: (1) develop a background reference document concerning recoverable spares cost estimating; (2) evaluate a representative sample of existing spares cost models; and (3) use aircraft physical and performance characteristics to develop a model for estimating annual replenishment spares cost. A condemnations cost estimating relationship (CER) was developed first and then both a CER and spreadsheet generated factors which related condemnations to replenishment spares costs were developed. For the condemnations CER, only logarithmic transformations provided statistically acceptable results, and even these models exhibited wide prediction intervals due to large amount of variability in the CER databases (as evidenced by the number of outliers). The CER relating condemnations to replenishment spares costs was a poorer statistical performer. Spreadsheet generated factors showed that the ratio of replenishment spares requirements to condemnations exhibited a downward trend across the data years.

AFIT Designator

AFIT-GCA-LSQ-91S-10

DTIC Accession Number

ADA243920

Comments

The author's Vita page is omitted

Presented to the Faculty of the School of Systems and Logistics of the Air Force Institute of Technology, Air University, in Partial Fulfillment of the Requirements for the Degree of Master of Science

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