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Operations Research, Systems Engineering and Industrial Engineering Commons

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Air Force Institute of Technology

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Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Tracked Vehicle Physics-Based Energy Modelling And Series Hybrid System Optimisation For The Bradley Fighting Vehicle, Travis E. Mcwhirter, Torrey J. Wagner, John E. Stubbs, Denise M. Rizzo, Jada B. Williams Dec 2019

Tracked Vehicle Physics-Based Energy Modelling And Series Hybrid System Optimisation For The Bradley Fighting Vehicle, Travis E. Mcwhirter, Torrey J. Wagner, John E. Stubbs, Denise M. Rizzo, Jada B. Williams

Faculty Publications

A hybrid electric tracked ground vehicle (HETGV) can reduce military fuel usage, however a review of current tools determined they are not suitable to estimate HEGTV performance. Based on topographic data and vehicle attributes, this research developed an estimation tool by creating a model to determine tracked vehicle energy and fuel requirements, and using these requirements, created a HEGTV cost and performance optimisation for the Bradley fighting vehicle energy system. The optimised design reduced fuel consumption by 15%, and met the vehicle's peak power requirement of 365 kW, with a recommended configuration of a 135 kW generator and 100 ...


A Sustainable Prototype For Renewable Energy: Optimized Prime-Power Generator Solar Array Replacement, Nathan Thomsen, Torrey J. Wagner, Andrew J. Hoisington, Steven J. Schuldt Jan 2019

A Sustainable Prototype For Renewable Energy: Optimized Prime-Power Generator Solar Array Replacement, Nathan Thomsen, Torrey J. Wagner, Andrew J. Hoisington, Steven J. Schuldt

Faculty Publications

Remote locations such as disaster relief camps, isolated arctic communities, and military forward operating bases are disconnected from traditional power grids forcing them to rely on diesel generators with a total installed capacity of 10,000 MW worldwide. The generators require a constant resupply of fuel, resulting in increased operating costs, negative environmental impacts, and challenging fuel logistics. To enhance remote site sustainability, planners can develop stand-alone photovoltaic-battery systems to replace existing prime power generators. This paper presents the development of a novel cost-performance model capable of optimizing solar array and Li-ion battery storage size by generating tradeoffs between minimizing ...


Evaluation Criteria For Selecting Nosql Databases In A Single Box Environment, Ryan D. Engle, Brent T. Langhals, Michael R. Grimaila, Douglas D. Hodson Aug 2018

Evaluation Criteria For Selecting Nosql Databases In A Single Box Environment, Ryan D. Engle, Brent T. Langhals, Michael R. Grimaila, Douglas D. Hodson

Faculty Publications

In recent years, NoSQL database systems have become increasingly popular, especially for big data, commercial applications. These systems were designed to overcome the scaling and flexibility limitations plaguing traditional relational database management systems (RDBMSs). Given NoSQL database systems have been typically implemented in large-scale distributed environments serving large numbers of simultaneous users across potentially thousands of geographically separated devices, little consideration has been given to evaluating their value within single-box environments. It is postulated some of the inherent traits of each NoSQL database type may be useful, perhaps even preferable, regardless of scale. Thus, this paper proposes criteria conceived to ...


Likelihood And Cost Impact Of Engineering Change Requirements For Dod Contracts, James C. Ellis, Edward D. White, Jonathan D. Ritschel, Shawn M. Valentine, Brandon Lucas, Ian S. Cordell Apr 2018

Likelihood And Cost Impact Of Engineering Change Requirements For Dod Contracts, James C. Ellis, Edward D. White, Jonathan D. Ritschel, Shawn M. Valentine, Brandon Lucas, Ian S. Cordell

Faculty Publications

Purpose: There appears to be no empirical-based method in the literature for estimating if an engineering change proposal (ECP) will occur or the dollar amount incurred. This paper aims to present an empirically based approach to address this shortfall.
Design/Methodology/Approach: Using the cost assessment data enterprise database, 533 contracts were randomly selected via a stratified sampling plan to build two regression models: one to predict the likelihood of a contract experiencing an ECP and the other to determine the expected median per cent increase in baseline contract cost if an ECP was likely. Both models adopted a stepwise ...


Forecasting Us Army Enlistment Contract Production In Complex Geographical Marketing Areas, Joshua L. Mcdonald, Edward D. White, Raymond J. Hill, Christian Pardo Aug 2017

Forecasting Us Army Enlistment Contract Production In Complex Geographical Marketing Areas, Joshua L. Mcdonald, Edward D. White, Raymond J. Hill, Christian Pardo

Faculty Publications

Purpose: The purpose of this paper is to demonstrate an improved method for forecasting the US Army recruiting. Design/methodology/approach: Time series methods, regression modeling, principle components and marketing research are included in this paper. Findings: This paper found the unique ability of multiple statistical methods applied to a forecasting context to consider the effects of inputs that are controlled to some degree by a decision maker. Research limitations/implications: This work will successfully inform the US Army recruiting leadership on how this improved methodology will improve their recruitment process.
Practical implications: Improved US Army analytical technique for forecasting ...


Methodology For Simulation And Analysis Of Complex Adaptive Supply Network Structure And Dynamics Using Information Theory, Joshua V. Rodewald, John M. Colombi, Kyle F. Oyama, Alan W. Johnson Oct 2016

Methodology For Simulation And Analysis Of Complex Adaptive Supply Network Structure And Dynamics Using Information Theory, Joshua V. Rodewald, John M. Colombi, Kyle F. Oyama, Alan W. Johnson

Faculty Publications

Supply networks existing today in many industries can behave as complex adaptive systems making them more difficult to analyze and assess. Being able to fully understand both the complex static and dynamic structures of a complex adaptive supply network (CASN) are key to being able to make more informed management decisions and prioritize resources and production throughout the network. Previous efforts to model and analyze CASN have been impeded by the complex, dynamic nature of the systems. However, drawing from other complex adaptive systems sciences, information theory provides a model-free methodology removing many of those barriers, especially concerning complex network ...


Impact Of Prognostic Uncertainty In System Health Monitoring, Robert M. Vandawalker, David R. Jacques, Jason K. Freels May 2015

Impact Of Prognostic Uncertainty In System Health Monitoring, Robert M. Vandawalker, David R. Jacques, Jason K. Freels

Faculty Publications

Across many industries, systems are exceeding their intended design lives, whether they are ships, bridges or military aircraft. As a result failure rates can increase and unanticipated wear or failure conditions can arise. Health monitoring research and application has the potential to more safely lengthen the service life of a range of systems through utilization of sensor data and knowledge of failure mechanisms to predict component life remaining. A further benefit of health monitoring when combined across an entire platform is system health management. System health management is an enabler of condition based maintenance, which allows repair or replacement based ...


Toward Agent-Based Modeling Of The U.S. Department Of Defense Acquisition System, Karl Schwenn, John M. Colombi, Theresa Wu, Kyle F. Oyama, Alan W. Johnson Mar 2015

Toward Agent-Based Modeling Of The U.S. Department Of Defense Acquisition System, Karl Schwenn, John M. Colombi, Theresa Wu, Kyle F. Oyama, Alan W. Johnson

Faculty Publications

The systems development, procurement and sustainment of a nation's military equipment is vital to its national interests, but the process is complex, constantly changing and highly adaptive, as well as time consuming and costly. The U.S. Department of Defense (DoD) expends both large amounts of capital and manpower to equip its armed forces. This research seeks to identify opportunities to gain better insight into the functioning of the defense acquisition system, building on previous simulations. A case is made that the DoD Requirements, Planning Acquisition, Technology and Logistics System is a complex adaptive system that has characteristics appropriate ...


Rapid Development: A Content Analysis Comparison Of Literature And Purposive Sampling Of Rapid Reaction Projects, Andrew R. Smith, John M. Colombi, Joseph R. Wirthlin Feb 2013

Rapid Development: A Content Analysis Comparison Of Literature And Purposive Sampling Of Rapid Reaction Projects, Andrew R. Smith, John M. Colombi, Joseph R. Wirthlin

Faculty Publications

In the current environment of military operations requesting short development timelines to counter insurgent tactics, the engineering team often searches for ways to deliver the “80% solution”, typically in 6-12 months. These are labeled rapid development projects. A content analysis of best practices in commercial product development literature, where time to market is often a driving factor, was accomplished showing varying emphasis of systems engineering (SE) technical and technical management processes. This analysis confirms a preconceived notion of “plan upfront and early” by emphasizing Stakeholder Requirements Definition, Architecture Design and Technical Planning. A purposive sampling of Air Force Research Laboratory ...


A Fuzzy Evaluation Method For System Of Systems Meta-Architectures, Louis Pape, Kristin Giammarco, John M. Colombi, Cihan Dagli, Nil Kilicay-Ergin, George Rebovich Feb 2013

A Fuzzy Evaluation Method For System Of Systems Meta-Architectures, Louis Pape, Kristin Giammarco, John M. Colombi, Cihan Dagli, Nil Kilicay-Ergin, George Rebovich

Faculty Publications

A method is proposed for evaluating a range of System of Systems (SoS) meta-architecture alternatives. SoS are composed through combination of existing, fully functioning Systems, possibly with minor functional changes, but certainly by using the combined Systems to achieve a new capability, not available from the Systems alone. The meta-architecture describes how all possible subsets of Systems can be combined to create an SoS. The fitness of a realizable SoS architecture may be characterized by terms such as unacceptable, marginal, above average, or excellent. While these terms provide little information about the SoS when used alone and informally, they readily ...


A Cost-Based Decision Tool For Valuing Dod System Design Options, Erin T. Ryan, David R. Jacques, Jonathan D. Ritschel, John M. Colombi Feb 2013

A Cost-Based Decision Tool For Valuing Dod System Design Options, Erin T. Ryan, David R. Jacques, Jonathan D. Ritschel, John M. Colombi

Faculty Publications

The DoD has frequently demonstrated its ability to procure phenomenal systems; however, these accomplishments are often tarnished by substantial cost and schedule overruns. While defense acquisition policies are continually being revised to address these perennial problems, many believe that a more fundamental source of these overruns is the lack of flexibility in the systems being developed, which tend to preclude effective responses to unexpected events. However, providing justification to invest in flexibility is a tough sell when the measure of value is a military capability or political outcome, as there is no extant method to demonstrate the potential return on ...


Observations On Expedited Systems Engineering Practices In Military Rapid Development Projects, Debra F. Lepore, John M. Colombi, Jennifer Ford, Ryan Colburn, Yosef Morris Feb 2013

Observations On Expedited Systems Engineering Practices In Military Rapid Development Projects, Debra F. Lepore, John M. Colombi, Jennifer Ford, Ryan Colburn, Yosef Morris

Faculty Publications

This research, conducted in the Systems Engineering Research Center (SERC), examined systems engineering and engineering management practices for military rapid capability and urgent needs programs. Lifecycle of urgent needs programs is driven by “time to market” as opposed to complete satisfaction of static requirements, with delivery expected in months versus years/decades. The processes and practices applied to urgent needs must add value and not require an excessive bureaucratic oversight to implement, while at the same time address, understand, and manage risk such that programs can understand better where to include, truncate, eliminate, tailor, or scale systems engineering practices and ...


Understanding System Of Systems Development Using An Agent- Based Wave Model, Paulette Acheson, Louis Pape, Cihan Dagli, Nil Kilicay-Ergin, John M. Colombi, Khaled Haris Nov 2012

Understanding System Of Systems Development Using An Agent- Based Wave Model, Paulette Acheson, Louis Pape, Cihan Dagli, Nil Kilicay-Ergin, John M. Colombi, Khaled Haris

Faculty Publications

System of Systems (SoS) development is a complex process that depends on the cooperation of various independent Systems[1]. SoS acquisition and development differs from that typical for a single System; it has been shown to follow a wave paradigm known as the Wave Model[2]. Agent based models (ABMs) consist of a set of abstracted entities referred to as agents, and a framework using simplified rules for simulating agent decisions and interactions. Agents have their own goals and are capable of perceiving changes in the environment. Systemic (global) behavior emerges from the decisions and interactions of the agents. This ...


Flight Test Results For Uavs Using Boid Guidance Algorithms, Jason B. Clark, David R. Jacques Mar 2012

Flight Test Results For Uavs Using Boid Guidance Algorithms, Jason B. Clark, David R. Jacques

Faculty Publications

A critical technology for operating groups of Uninhabited Aerial Vehicles (UAVs) is distributed guidance. Distributed guidance allows an operator to command several vehicles at the same time, reduces operator workload, and adds redundancy to the system. Some of the leading software candidates for achieving distributed guidance are known as Boid Guidance Algorithms (BGAs), which are agent-based techniques relying on the interactions of simple behaviors. Flight tests are crucial to the advancement of flight technologies such as BGAs, and this was identified as an important area for development. This paper presents the results from the 2005 flight tests of BGAs at ...


Practical Measurement Of Complexity In Dynamic Systems, Jason B. Clark, David R. Jacques Mar 2012

Practical Measurement Of Complexity In Dynamic Systems, Jason B. Clark, David R. Jacques

Faculty Publications

A difficulty in complexity theory is lack of a clear definition for complexity, particularly one that is measurable. Those approaches that provide measurable definitions for the absolute complexity of a system often impose the requirement of perfect or near-perfect knowledge of system structure.In practice, it is intractable or impossible to measure the complexity of most dynamic systems.However, by measuring behavioral complexity in context with environmental scenarios, it is ossible to set bounds on a system's absolute (maximum) complexity and estimate its total complexity. As this paper shows, behavioral complexity can be determined by observing a system's ...


Allocation Of Communications To Reduce Mental Workload, Travis J. Pond, Brandon M. Webster, John P. Machuca, John M. Colombi, Michael E. Miller, Randall Gibb Mar 2012

Allocation Of Communications To Reduce Mental Workload, Travis J. Pond, Brandon M. Webster, John P. Machuca, John M. Colombi, Michael E. Miller, Randall Gibb

Faculty Publications

As the United States Department of Defense continues to increase the number of Remotely Piloted Aircraft (RPA) operations overseas, improved Human Systems Integration becomes increasingly important. Manpower limitations have motivated the investigation of Multiple Aircraft Control (MAC) configurations where a single pilot controls multiple RPAs simultaneously. Previous research has indicated that frequent, unpredictable, and oftentimes overwhelming, volumes of communication events can produce unmanageable levels of system induced workload for MAC pilots. Existing human computer interface design includes both visual information with typed responses, which conflict with numerous other visual tasks the pilot performs, and auditory information that is provided through ...


Large Aircraft Infrared Countermeasures (Laircm) Systems Engineering Case Study, Air Force Center For Systems Engineering, William Albery Jan 2012

Large Aircraft Infrared Countermeasures (Laircm) Systems Engineering Case Study, Air Force Center For Systems Engineering, William Albery

AFIT Documents

No abstract provided.


E-10a Mc2a Systems Engineering Case Study, Air Force Center For Systems Engineering, William Albery Jun 2011

E-10a Mc2a Systems Engineering Case Study, Air Force Center For Systems Engineering, William Albery

AFIT Documents

No abstract provided.


A-10 Thunderbolt Ii (Warthog) Systems Engineering Case Study, Air Force Center For Systems Engineering, David R. Jacques, Dennis D. Strouble May 2011

A-10 Thunderbolt Ii (Warthog) Systems Engineering Case Study, Air Force Center For Systems Engineering, David R. Jacques, Dennis D. Strouble

AFIT Documents

No abstract provided.


Mh-53j/M Pave Low Iii/Iv Systems Engineering Case Study, Air Force Center For Systems Engineering, William Albery, Raymond L. Robb, Lee Anderson Jan 2011

Mh-53j/M Pave Low Iii/Iv Systems Engineering Case Study, Air Force Center For Systems Engineering, William Albery, Raymond L. Robb, Lee Anderson

AFIT Documents

No abstract provided.


International Space Station Systems Engineering Case Study, Air Force Center For Systems Engineering, Bill Stockman, Joe Boyle, John Bacon Aug 2010

International Space Station Systems Engineering Case Study, Air Force Center For Systems Engineering, Bill Stockman, Joe Boyle, John Bacon

AFIT Documents

This case study on the International Space Station considers what many believe to have been the ultimate international engineering project in history. The initial plans involved the direct participation of 16 nations, 88 launches and over 160 spacewalks-more space activities than NASA had accomplished prior to the 1993 International Space Station decision. Probably more important was the significant leap in System Engineering (SE) execution that would be required to build and operate a multi-national space station. In a short period of time, NASA and its partners had to work out how to integrate culturally different SE approaches, designs, languages and ...


T-6a Texan Ii Systems Engineering Case Study, Air Force Center For Systems Engineering, Bill Kinzig, Dave Bailey Jan 2010

T-6a Texan Ii Systems Engineering Case Study, Air Force Center For Systems Engineering, Bill Kinzig, Dave Bailey

AFIT Documents

No abstract provided.


Kc-135 Simulator Systems Engineering Case Study, Air Force Center For Systems Engineering, Macaulay-Brown, Inc., Don Chrislaghi, Richard Dyer, Free Jay Aug 2009

Kc-135 Simulator Systems Engineering Case Study, Air Force Center For Systems Engineering, Macaulay-Brown, Inc., Don Chrislaghi, Richard Dyer, Free Jay

AFIT Documents

No abstract provided.


Global Hawk Systems Engineering Case Study, Air Force Center For Systems Engineering, Bill Kinzig Aug 2009

Global Hawk Systems Engineering Case Study, Air Force Center For Systems Engineering, Bill Kinzig

AFIT Documents

No abstract provided.


C-5a Galaxy Systems Engineering Case Study, Air Force Center For Systems Engineering, John M. Griffin Mar 2008

C-5a Galaxy Systems Engineering Case Study, Air Force Center For Systems Engineering, John M. Griffin

AFIT Documents

The C-5 Systems Engineering Case Study captures the untold story of the application of systems engineering during the concept exploration, development, and production of the USAF C-5A and C-5B aircraft. The case study examines and dissects the systems engineering process as applied by the Air Force C-5 System Program Office and the prime contractor, Lockheed, Georgia, from the program s genesis in 1957 to the last delivery of the C-5A and the beginning of the C-5B program in 1973. Numerous interviews were conducted with the principals who managed and directed the program and a story of the systems engineering process ...


Hubble Space Telescope Systems Engineering Case Study, Air Force Center For Systems Engineering, James J. Mattice Mar 2008

Hubble Space Telescope Systems Engineering Case Study, Air Force Center For Systems Engineering, James J. Mattice

AFIT Documents

The Hubble Space Telescope (HST) is an orbiting astronomical observatory operating in the spectrum from the near-infrared into the ultraviolet. Launched in 1990 and scheduled to operate through 2010, HST carries and has carried a wide variety of instruments producing imaging, spectrographic, astrometric, and photometric data through both pointed and parallel observing programs. Over 100,000 observations of more than 20,000 targets have been produced for retrieval. A macroscopic, cumulative representation of these observations is shown in the figure below to provide a sense of the enormous volume of astronomical data collected by the HST about our universe, our ...


Global Positioning System Systems Engineering Case Study, Air Force Center For Systems Engineering, Patrick J. O'Brien, John M. Griffin Oct 2007

Global Positioning System Systems Engineering Case Study, Air Force Center For Systems Engineering, Patrick J. O'Brien, John M. Griffin

AFIT Documents

No abstract provided.


F-111 Systems Engineering Case Study, Air Force Center For Systems Engineering, G. Keith Richey Mar 2005

F-111 Systems Engineering Case Study, Air Force Center For Systems Engineering, G. Keith Richey

AFIT Documents

The systems engineering lessons from the F-111 program will facilitate learning by emphasizing practical applications and resulting outcomes to the current processes and tools used on today s programs. The student will understand the long-term consequences of systems engineering as implemented on the F-111 and its effect on cost, schedule, and operational effectiveness. The reader can then postulate outcomes of alternate decisions at the program/system level.


Theater Battle Management Core System Systems Engineering Case Study, Air Force Center For Systems Engineering, Josiah R. Collens Jr., Bob Krause Feb 2005

Theater Battle Management Core System Systems Engineering Case Study, Air Force Center For Systems Engineering, Josiah R. Collens Jr., Bob Krause

AFIT Documents

The Theater Battle Management Core System (TBMCS) is an integrated air command and control (C2) system that performs standardized, secure, automated air battle planning and execution management for Air Force, multi-service, and allied commanders in theaters of operation worldwide. TBMCS provides the means to plan, direct, and control all theater air operations and to coordinate with land, maritime, and special operations elements. It is deployed at C2 nodes at national, force and wing/unit-level elements. TBMCS operates in support of planners and decision makers at, and below, the level of Joint Force Air Component Commander. The system is modular and ...


Academic Audit Of Afit Programs In Systems Engineering, United States Air Force Scientific Advisory Board Dec 2004

Academic Audit Of Afit Programs In Systems Engineering, United States Air Force Scientific Advisory Board

AFIT Documents

This report provides an assessment and recommendations for the systems engineering educational programs at the Air Force Institute of Technology (AFIT). The Air Force needs in systems engineering education are briefly summarized, followed by an analysis of the educational program at AFIT. Based on the assessment of AFIT's program, a set of recommendations are given for improving the programs and their utility to the Air Force. Appendices to the report contain additional information on the AFIT programs and an assessment of other graduate systems engineering programs in the US.