TURBOJET ENGINE PROCUREMENT COST ESTIMATING RELATIONSHIPS.
Abstract
Cost estimation is a critical phase of national defense planning, programming, and budgeting. The historical means of accomplishing this in the Air Force is largely qualitative and subjective. Quantitative cost estimation techniques and some major pitfalls in usage are explored. Despite many assumptions and approximations, cost estimating relationships are felt to offer a sound basis for cost estimation in practice. Turbojet engine costs and major characteristics are determined for fourteen engines, and an effort is made to reveal a basic cost-cahracteristic relationship. A linear or log-linear relationship is hypothesized. Although theoretical parameters of engine description appear promising, multiple regression of them singly and in combination fail to substantiate cost dependence. A single characteristic, specific weight (dry weight divided by military thrust), accounts for 85% to 92% of cost per unit weight in a log-linear relationship, after four questionable data points are eliminated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1965
- Accession Number
- AD0628057
Entities
People
- Robert Patterson Gould
Organizations
- Air Force Institute of Technology