Accession Number : ADA186923

Title :   The Use of Cost Estimating Relationships versus Accounting Models for Estimating Maintenance and Repair Costs: A Methodology Demonstration.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF SYSTEMS AND LOGISTICS

Personal Author(s) : Verma, Rajiv S

PDF Url : ADA186923

Report Date : Sep 1987

Pagination or Media Count : 178

Abstract : This thesis demonstrated a methodology of developing a Cost Estimating Relationship (CER) that is capable of generating nearly the same cost estimates as an accounting type of cost model. A cost model was first developed that estimated annual recurring maintenance and repair associated costs of a jet engine. This model used 51 input variables and 30 equations and represented an accounting approach to cost estimating with input requirements at low levels of detail. Using techniques of multiple linear regression, a CER was developed that used only seven aggregated variables to estimate the same cost at an acceptable level of accuracy. The emphasis in this thesis is on the demonstration of a methodology that can be used to develop CERs. Both the accounting type cost model and the CER in this thesis are exclusively for the validation of a methodology and were developed using an artificially generated data base. As such they are not valid for any cost estimation purposes. Keywords: Life cycle costs; Aircraft maintenance; Cost analysis; Regression analysis; Theses.

Descriptors :   *AIRCRAFT MAINTENANCE, *COST ESTIMATES, *COST MODELS, ACCOUNTING, ACCURACY, COST ANALYSIS, COSTS, DATA BASES, DEMONSTRATIONS, ESTIMATES, INPUT, JET ENGINES, LIFE CYCLE COSTS, LINEAR REGRESSION ANALYSIS, LOW LEVEL, METHODOLOGY, REGRESSION ANALYSIS, REPAIR, REQUIREMENTS, VALIDATION, VARIABLES, COMPUTER PROGRAMS, THESES

Subject Categories : Economics and Cost Analysis
      Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE