Accession Number : ADA011595
Title : Aircraft Engines: Demand Forecasting and Inventory Redistribution.
Descriptive Note : Final rept. 15 May 73-15 Mar 74,
Corporate Author : MICHIGAN UNIV ANN ARBOR DEPT OF INDUSTRIAL AND OPERATIONS ENGINEERING
Personal Author(s) : Galliher,Herbert P. ; Wilson,Richard C.
Report Date : FEB 1975
Pagination or Media Count : 152
Abstract : Using historical experience with J79 engines, an investigation was made of the quantitative relationships between engine age, utilization, overhaul-rate, failure-rate, and fleet age-distribution. Based upon these considerations, a new computerized method for forecasting demand for spare engines is proposed to replace present AFM 400-1 procedures. A procedure for redistributing multi-indentured stocks of repairable components and assemblies from depot to base is proposed. The procedure requires forecasts of removal rates, base-to-depot return rates, MOD-METRIC-like stock-allocation levels, repair and ship times as inputs. Whenever a stock unit becomes available at the depot or is required at a base, the procedure determines in real time a stock allocation which seeks to minimize long-run expected system backorders.
Descriptors : *Jet engines, *Spare parts, *Replacement theory, Inventory control, Logistics planning, Inventory analysis, Failure, Predictions
Subject Categories : Jet and Gas Turbine Engines
Distribution Statement : APPROVED FOR PUBLIC RELEASE