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Operations Research, Systems Engineering and Industrial Engineering

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Articles 151 - 156 of 156

Full-Text Articles in Aviation

Demonstrating The Effects Of Shop Flow Process Variability On The Air Force Depot Level Reparable Item Pipeline, Marvin A. Arostegui Jr., Jon A. Larvick Sep 1992

Demonstrating The Effects Of Shop Flow Process Variability On The Air Force Depot Level Reparable Item Pipeline, Marvin A. Arostegui Jr., Jon A. Larvick

Theses and Dissertations

This study investigated the effects of reducing the mean processing time and variability in the Shop Flow Segment of the Depot Level Reparable Item pipeline. The measure of interest was the average number of units in the pipeline of a particular type of item (referred to as the average pipeline contents). A literature review revealed that process variability in the pipeline has an impact on its effective operation and cost. A simulation model was developed to determine if reducing mean processing time and/or variability in the Shop Flow Segment would result in a reduction in the average pipeline contents. The …


Change In Self-Efficacy As A Measure Of Training Effectiveness At Squadron Officer School, Edward J. Berghorn, Michael Lewis Sep 1992

Change In Self-Efficacy As A Measure Of Training Effectiveness At Squadron Officer School, Edward J. Berghorn, Michael Lewis

Theses and Dissertations

The purpose of this research was to determine the effect of the US air Force Squadron Officer School (SOS) training curriculum by measuring students' self-efficacy before and after training. The authors verified through the literature that an individual's personal assessment of his self-efficacy was associated with task understanding and performance. Then self-efficacy questions were generated (for each of the four SOS curriculum areas) for an individual to assess his ability to perform a behavior related to a particular SOS learning objective. Demographic questions were also developed and combined with the self- efficacy questions to form pretest (before SOS training) and …


An Analysis Of Escort Formations, Mustafa Ilhan Mar 1992

An Analysis Of Escort Formations, Mustafa Ilhan

Theses and Dissertations

This study used computer simulation to investigate escort fighter formations unknown interceptor threat environment. A USAF computer simulation model, TAC, was used to simulate air combat between the escorts and the interceptors in several different combat scenarios. The escort formations were defined by the vertical and horizontal distances of the escort fighters from the main strike body. Interceptors were characterized as one of two types of fighters with dissimilar aircraft frames and missile firing ranges. A central composite design was used to mathematically model the effect of escort formations and interceptor type on the survivability of the bombers and escorts. …


An Outline For A Manufacturing Planning And Control System For A Repair/ Overhaul/Rebuilding Environment, Peter H. Miyares Mar 1992

An Outline For A Manufacturing Planning And Control System For A Repair/ Overhaul/Rebuilding Environment, Peter H. Miyares

Theses and Dissertations

This study outlines a structure for a manufacturing planning and control (MPC) system for a repair/overhaul/rebuilding environment. Included an examination of the organizational components that must be incorporated into the system and the planning functions for which the system can be used. The study compares and contrasts the differences between an MPC system for a maintenance organization and a manufacturing organization and concludes that the MPC system for a maintenance organization must account for the greater degree of variability that occurs within the process. The proposed system is composed of an information system which collects data from throughout an organization …


Multilayer Perceptrons For Classification, Lisa M. Belue Mar 1992

Multilayer Perceptrons For Classification, Lisa M. Belue

Theses and Dissertations

Techniques for training, testing, and validating multilayer perceptrons are thoroughly examined. Results obtained using perceptrons are compared and contrasted with two multivariate discriminant analysis techniques- logistic regression and k neighbor. Methods for determining significant input features are investigated and a procedure for examining the confidence to place in the significance of these features is developed. Procedures to evaluate the applicability of high-order feature inputs are examined. These methods and procedures are applied to two very different applications. The first application concerns the prediction of Air Force pilot retention/separation rates for input to force projection models. The second application concerns the …


A Computer Based Educational Aid For The Instruction Of Combat Modeling, Richard S. Moore Feb 1992

A Computer Based Educational Aid For The Instruction Of Combat Modeling, Richard S. Moore

Theses and Dissertations

The Air Force Institute of Technology is one of few institutions that teaches combat modeling. Combat models are typically dynamic computer simulations of specialized dynamic processes. Great difficulty exists in portraying these dynamic and recurrent processes with conventional static diagrams. This thesis produced a computer-based instructional aid which presents animated examples of processes common to combat models, demonstrates a simple few-on-few aerial combat model, and encourages student exploration and interaction with these presentations. This aid provides dynamic examples of random number generation, detection processes, target selection, and target destruction. A complete combat model demonstrating a few-on-few air duel is animated …