Management and Operations Commons^™

Simulation Modeling And Analysis Of Tnmcs For The B-1 Strategic Bomber, Carl R. Parson

Theses and Dissertations

Simulation provides a method of modeling complex systems which would otherwise be impractical for quantitative experimentation. While other analytic techniques have been used to explore Total Non-Mission Capable [due to] Supply (TNMCS) rates, simulation offers a novel approach to discovering what aspects of the supply chain impact this metric. This research develops a discrete event simulation to investigate factors which affect TNMCS rates for the B-1B by modeling the core processes within the Air Force (AF) supply chain. A notional fleet of 16 aircraft at a single air base (Ellsworth AFB, SD) is modeled based on historical supply and maintenance …

Adverse Elevator Effect In Landing Flare, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Cyber This, Cyber That...So What?, Eric D. Trias, Bryan Bell

Faculty Publications

This article endorses the idea that cyber operations may be conducted in all war-fighting domains: air, space, cyberspace, land, and sea. In addition, despite the immaturity of cyberspace operational doctrines, the doctrines from air and space remain relevant and applicable to the cyberspace domain. Cyber operations are just another set of tools in the commander's toolbox. Although cyber operations have distinct ways of achieving effects, from an Air Force perspective they are similar too the air and space operations that support air and space (and cyberspace) functions. Known and established cyber operations provide war fighters with viable options to kinetic …

Simulation Analysis Of High Velocity Maintenance For The B-1b, Anson R. Park

Theses and Dissertations

This thesis explores the impact that High Velocity Maintenance (HVM) will have on aircraft availability rates for the B-1B by examining the proposed changes to the field maintenance and supply processes for the two B-1B squadrons of the 28th Bombardment Wing located at Ellsworth AFB, SD. There is a significant restructuring of depot level maintenance planned with the implementation of HVM, and the impact that this will have on base-level operations is important to determine, for it will provide insight as to whether or not HVM will be a feasible program with a high probability of successfully improving B-1B aircraft …

An Exploration Of The Effects Of Maintenance Manning On Combat Mission Readiness Utilizing Agent Based Modeling, Adam S. Mackenzie

Theses and Dissertations

Agent based models have been shown to be powerful tools in describing processes and systems centered on individual behaviors and local interactions (i.e. “bottom-up”) between specific entities. Current application areas tend to be focused within the business and social science arenas, although their usefulness has been demonstrated in the modeling of various chemistry and physics-based systems. Conversely, many highly process-oriented systems, such as manufacturing environments, tend to be modeled via “top-down” methods, including discrete or continuous event simulations among others. As a result, potentially critical attributes of the entities or resources modeled with these methods (spatial properties, “learning curve” or …

Individualized Cognitive Modeling For Close-Loop Task Mitigation, Guangfan Zhang, Roger Xu, Wei Wang, Jiang Li, Tom Schnell, Mike Keller, Thomas E. Pinelli (Ed.)

Electrical & Computer Engineering Faculty Publications

An accurate real-time operator functional state assessment makes it possible to perform task management, minimize risks, and improve mission performance. In this paper, we discuss the development of an individualized operator functional state assessment model that identifies states likely leading to operational errors. To address large individual variations, we use two different approaches to build a model for each individual using its data as well as data from subjects with similar responses. If a subject's response is similar to that of the individual of interest in a specific functional state, all the training data from this subject will be used …

Airport Bird Hazard Management, Flavio A. C. Mendonca Ph.D.

Publications

Aircraft collisions with birds, also commonly referred to as bird strikes, annually cost the commercial aviation industry in Brazil at least $6 million in direct damage and associated costs and hundreds of hours of aircraft down time. Although the economic costs of wildlife strikes are extreme, the cost in human lives lost when aircraft accidents occur as a result of strikes best illustrates the need for management of the wildlife strike problem. Bird strikes have been an increasing problem for the aviation industry. Air travel has become widespread all over the world. The aircraft has played an important role not …

Avoiding Aircraft Icing Accidents, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

A Comparison Of Algorithms That Estimate The Effectiveness Of Commercial Airline Boarding Strategies, Dalila Giraldo

Doctoral Dissertations and Master's Theses

The number of passengers carried by commercial aircraft has increased dramatically over the past 50 years, closely in-step with advances in aircraft design. This makes unloading and loading an aircraft, called turn-around time, critical to the success of the airport, the aircraft and the airlines. A number of mathematical algorithms have been developed over the years that purport to determine the most efficient boarding strategy for passengers by decreasing turn time. This thesis evaluated the boarding strategies most often used by the airlines and algorithms used to predict boarding efficiency. The models used were obtained from the literature and from …

Avoiding Veer-Off Accidents On Contaminated Runways, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Flying Non-Precision Approaches Precisely, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Chilling Out In The Sim: The Need For Icing Training., Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Flying Precision Approaches Precisely, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Towards A Single European Sky, Yael Gruksha-Cockayne, Bert De Reyck

Research Collection Lee Kong Chian School Of Business

We describe an integrated decision-making framework and model that we developed to aid EUROCONTROL, the European air traffic management organization, in its vital role of constructing a single unified European sky. Combining multicriteria decision analysis with large-scale optimization methods, such as integer programming and column generation using branch and price, our model facilitates the process by which the numerous European aviation stakeholders evaluate and select technological enhancements to the European air traffic management system. We consider multiple objectives and potential disagreements by stakeholders regarding the impact of proposed system enhancements and allow for different priorities for each key performance area. …

Aircraft Landing Operations On Contaminated Runways, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

An Advanced Tabu Search Approach To Solving The Mixed Payload Airlift Load Planning Problem, Robert Larry Nance

Theses and Dissertations

This paper presents a new tabu search based two-dimensional bin packing algorithm which produces high quality solutions to the Mixed Payload Airlift Load Planning (MPALP) problem using C-5 and C-17 aircraft. This algorithm, called Mixed Payload Airlift Load Planning Tabu Search (MPALPTS), surpasses previous research conducted in this area because, in addition to pure pallet cargo loads, MPALPTS can accommodate rolling stock cargo (i.e. tanks, trucks, HMMMVs, etc.) while still maintaining aircraft feasibility with respect to aircraft center of balance, mandatory cargo separations, aircraft floor structural limitations, etc. Furthermore, while this research is currently restricted to C-5 and C-17 aircraft, …

Assessing Structural Health Monitoring Alternatives Utilizing A Value-Focused Thinking Model, Margaret A. Barker, Fatih S. Gurbuz, Jeremy A. Schroeder

Theses and Dissertations

Current Air Force operations are undergoing significant changes necessitated by increasing fiscal constraints, increasing aircraft age, and recent drawdown in personnel to perform maintenance, repair, and other necessary functions. In order to deal with these challenges, the Air Force must effectively improve current operations. This paper explores potential structural health monitoring (SHM) solutions to some of the challenges facing aircraft maintenance and repair operations. As with any problem, a variety of solutions exist and this paper explores the potential solutions and limitations of various options. Aircraft SHM is an intriguing concept with potential capability to revolutionize current Air Force maintenance …

Time-Distance-Speed-Angle Problem, Nihad E. Daidzic

Aviation Department Publications

In this age of satellite navigation (GPS), Inertial Reference Systems (IRS), and Flight Management Systems (FMS), why would anyone bother with the fundamentals, right? Wrong! A well educated and trained pilot is still the best asset in any aircraft. Unfortunately, we see a trend in pilot training where the basic science and concepts are increasingly disregarded. Ignoring the best in human nature – intellectual curiosity and the quest for knowledge – and inviting the worst, boredom and the feeling of inferiority, will certainly take its toll sooner or later.

A simple method, rarely ever taught in practice, but found in …

When Go-Around Is Impossible - Defining The Point Of No Return, Nihad E. Daidzic,, Thomas Peterson

Aviation Department Publications

No abstract provided.

Maximizing Warfighter Capability Using Surveyed Necessity Measurement: Application To The Usaf F-15c Fleet, John M. Colombi, David R. Jacques, Dennis D. Strouble

Faculty Publications

Within the Department of Defense, with changing missions to counter dynamic and asymmetrical threats, the acquisition workforce strives to maximize capability for joint warfighting. How acquisition professionals measure and select capability improvements for the nation’s weapon systems is a perpetual challenge, made even more complex with constrained defense budgets. This study identifies a method for determining which upgrades should be purchased (production) for which aircraft in the F- 15C fleet by optimizing a capability proxy measure. Each upgrade’s “necessity” for a given mission area was obtained by conducting a survey of over 250 experienced F-15C pilots. The solution presented in …

Flying Dme Arcs, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Raising The Dead, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

The Influence Of Motivation And Investment On The Length Of Time Pilots Fly Into Degraded Weather, Bonnie M. Saxton

Master's Theses - Daytona Beach

Approximately 75% of weather-related accidents result in fatalities and are a primary safety concern in aviation. This study attempted to understand how financial motivation and time investment influence the length of time pilots fly into degraded weather. The sunk-cost effect claims that financially motivated pilots would continue longer when weather is encountered late in the flight. The results revealed that the financially motivated pilots continued longer than the non-financially motivated pilots when weather was encountered early in the flight. These results support the situation assessment hypothesis and cognitive anchoring. Specifically, how pilots assess the situation and utilize information obtained before …

Impact Of Airline Business Models On Fuel Efficiency Of Aircraft Operations In The National Airspace System (Nas), Trisha R. Khetia

Mechanical & Aerospace Engineering Theses & Dissertations

This is a documentation of the research that has been conducted by T. Khetia of the Batten College of Engineering and Technology at Old Dominion University in Norfolk, Virginia. The report summarizes fuel efficiency studies of aircraft operations in the National Airspace System (NAS).

This research was conducted to analyze the Hub-and-Spoke (H&S) system operations in the NAS and how a change in the balance of the H&S system would affect fuel efficiency metrics in the NAS. Several fuel metrics were calculated during the research in order to find out which metric would best represent the desired operation of the …

Robust Aircraft Squadron Scheduling In The Face Of Absenteeism, Osman Bahadir Gokcen

Theses and Dissertations

Air Force fighter aircraft squadrons the world over share a unique problem. Each requires complex training schedules coupling aircraft to pilots, the duo to missions and airspaces, and then the entire combination to a feasible time slot. Creating daily and weekly flight schedules that include shifts around the clock every day of the year with a set number of pilots is a time consuming job for manual schedulers within a squadron. Complicating matters is absenteeism. If one or more pilots are unable to perform their previously assigned tasks, due to sickness, aircraft failure, or reassignment, those tasks must be performed …

Simulated Multi-Echelon Readiness-Based Inventory Leveling With Lateral Resupply, Todd C. Burnworth

Theses and Dissertations

For the past fifty years, U.S. Air Force reparable inventory has been allocated based on an analytic model developed by Dr. Craig C. Sherbrooke. Although versions of his model can be implemented easily with the help of a computer, the analytic approach fundamentally lacks the flexibility to address numerous logistics issues. This body of research will offer a novel alternative approach that will enable researchers to investigate currently unsolved logistics problems such as quantifying the benefits of lateral resupply.

Entrepreneurial Spirit In Government Managed Enterprises: Evidence From The U.S. General Aviation Airports, Vitaly S. Guzhva, Massoud Bazargan, David A. Byers

Management, Marketing and Operations - Daytona Beach

While a number of studies introduce entrepreneurship in the public sector, there is still a need for empirical research in this field. We use a survey of U.S. general aviation airport managers to investigate the benefits of entrepreneurial spirit in public sector management. The results of logistic regressions suggest that the airport managers’ beliefs in importance of self-sustainability significantly improve the likelihood of general aviation airports to be self-sustaining. On the other hand, the airport specific characteristics, such as a favorable location, county population, and others are not statistically significant in achieving self-sustainability. Our findings support the literature that argue …

Rolls Royce Declares Bankruptcy, John Alfred Heitmann

History Faculty Publications

Despite more than sixty years of engineering excellence, Rolls-Royce failed in its attempt to design and manufacture a radically new jet engine to meet contractual obligations with the Lockheed Corp. Consequently, both British and U.S. governments had to step in to avoid an unprecedented economic catastrophe.

Determinants Of Financial Health Of Us General Aviation Airports, Vitaly S. Guzhva, Massoud Bazargan, David A. Byers

Management, Marketing and Operations - Daytona Beach

This survey-based study investigates the current financial environment of US general aviation airports. Due to a dearth of data and research on the financial performance of general aviation airports, the paper provides vital information regarding the critical needs and major revenue sources of such airports.The findings suggest that general aviation airports can be self-sustaining regardless of their location, runway length and other airport-specific characteristics.The attitudes of the airport manager towards the importance of financial self-sustainability, positive relationships with local communities, and utilisation of non-traditional and non-aviation revenue sources are found to be critical for the financial health of general aviation …

Air Mobility Command's En Route Support Infrastructure: A Construct Of Aircraft Type And Geographic Location Utilized To Assess En Route Aircraft Logistics Support, Robert D. Polomsky

Theses and Dissertations

The ability of the United States Armed Forces to maintain a global presence and rapidly project military power anywhere in the world are key factors in preserving our freedom. To accomplish the demanding task of global reach support, Air Mobility Command employs an en route support infrastructure. These en route locations provide varying levels of command, control, and communications (C3), logistics support, and aerial port functions. The goal of the en route is to minimize delays for AMC mission aircraft. However, these en route locations comprise a small percentage of the locations that AMC aircraft visit. Given the critical demand …