Research for Computer Models

The Aircraft Force Projection Model (AFPM) is designed to project the Navy's aircraft inventory over a ten-year period and attempts to satisfy the operating requirements of a given set of forces with the projected operating inventory. In addition the AFPM generates useful characteristics of the aircraft inventory such as projections of the age distributions, attrition quantities, pipeline requirements, and rework requirements. This volume describes the input data file, file maintenance procedures, and how to run the model. The Aircraft Force Projection Model (AFPM) is documented in two volumes. Volume I, The Users Guide, describes the input data file, file maintenance procedures, and how to run the model. Volume II, The Programmers Guide, contains a detailed explanation of the AFPM computer programs and program listings.

The Navy Resource Model (NARM) is a system of computer programs which provides the capability to cost a total Department of the Navy program. Attached to the basic cost model are many peripheral programs that serve important functions. This paper focuses on the use of one such program, UPDATE. UPDATE's function is to provide the NARM user with a flexible method of changing the data base. It is intended to be a guide for the new or casual user as well as a reference for the experienced user.

This paper discusses the procedure of factor analysis and provides details on the use of a computer program which performs a principal components analysis, tests of significance, and rotation of factors determined from a matrix of intercorrelations of up to 99 variables.

The Officer Projection Model (OPM) projects the flow of officers through the ranks of the U.S. Navy. It projects an initial officer inventory (characterized by length of service, grade, and promotion status) in yearly increments, accounting for attrition, promotion, legal constraints (Title 10 of the U.S. Code), and such management policies as minimum accession requirements and end strength targets. It is devoted especially to simulating the Navy's officer promotion system, and provides several options which consider the interactions of flow point, promotion rate, zone size, grade structure and end strength, and early and late selection. The OPM will also compute annual compensation, separation pay, retirement pay, and the present value of retirement pay for the remaining life expectancy of projected retirees. The model provides management with a tool for evaluating alternative promotion policies and retirement proposals, and for studying the interactions of officer end strengths, promotions, and accessions, and the cost of changes in longevity and grade structure. The Guide for Users, Volume I, describes the Navy's officer system and the model and discusses the data and policy variables to be specified by the user. The Guide for Programmers, Volume II, provides a detailed explanation of the computer coding as an aid to changing, and making special adaptations of the model.