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Operations and Supply Chain Management Commons™
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Articles 91 - 120 of 391
Full-Text Articles in Operations and Supply Chain Management
Advancing Cost-Effective Readiness By Improving The Supply Chain Management Of Sparse, Intermittently-Demanded Parts, Gregory H. Gehret
Advancing Cost-Effective Readiness By Improving The Supply Chain Management Of Sparse, Intermittently-Demanded Parts, Gregory H. Gehret
Theses and Dissertations
Many firms generate revenue by successfully operating machines such as welding robots, rental cars, aircraft, hotel rooms, amusement park attractions, etc. It is critical that these revenue-generating machines be operational according to the firm s target or requirement; thus, assuring sustained revenue generation for the firm. Machines can and do fail, and in many cases, restoring the downed machine requires spare part(s), which are typically managed by the supply chain. The scope of this research is on the supply chain management of the very sparse, intermittently-demanded spare parts. These parts are especially difficult to manage because they have little to …
Antecedents To Organizational Performance: Theoretical And Practical Implications For Aircraft Maintenance Officer Force Development, Andrew L. Cooper
Antecedents To Organizational Performance: Theoretical And Practical Implications For Aircraft Maintenance Officer Force Development, Andrew L. Cooper
Theses and Dissertations
This research explored the impact of Aircraft Maintenance Officer human capital, learning organization, and knowledge management on organizational performance. Survey methodology was utilized to gather data with both theoretical and practical implications on 21A force development practices. Solicitation of information regarding 21A competencies, utility of current AF logistics courses, and latent constructs were conducted through a web-based self-administered cross-sectional survey. Examination of the latent variables human capital, learning organization, and knowledge management was conducted using exploratory factor analysis and multiple linear regression supporting a positive effect on organizational performance. Practical application of the theoretical findings could yield potential cost savings …
An Inventory And Safety Stock Analysis Of Air Force Medical Service Pharmaceuticals, Blake Smith
An Inventory And Safety Stock Analysis Of Air Force Medical Service Pharmaceuticals, Blake Smith
Theses and Dissertations
A significant challenge facing the Air Force Medical Service (AFMS) Military Treatment Facilities (MTFs) is the perishability costs associated with its pharmaceutical stock. During a two year time period, the AFMS returned expired or nearly expired pharmaceuticals valued at over $23,000,000. In response to the waste represented by pharmaceutical perishability cost, this thesis analyzes the historical inventory management decisions of 173 MTF/pharmaceutical combinations and proposes an alternative inventory control policy to reduce perishability costs. Based on the critical nature of pharmaceuticals and importance of generating high patient satisfaction, the proposed alternative inventory control system was required to be cognizant of …
An Analysis Of The Impact Of Variation In Mean Time Between Demand On Air Force Fleet Level Aircraft Parts Inventories, Andrew J. Berger, Caleb S. Murphy
An Analysis Of The Impact Of Variation In Mean Time Between Demand On Air Force Fleet Level Aircraft Parts Inventories, Andrew J. Berger, Caleb S. Murphy
Theses and Dissertations
This thesis researched the accuracy of demand forecasting and impact of demand variation on requirements definition for Air Force aircraft secondary items. Specifically, this thesis sought to answer three questions: How does the Air Force calculate item requirements? , How accurate is the current system at predicting future item requirements? , and How do variations in predicted demand change item requirements? The literature review described the Air Force supply system for aircraft secondary items. Analysis into current demand forecast accuracy found that the level of error between actual and predicted historic demand was as high as 92% for the items …
Identifying, Tracking, And Prioritizing Parts Unavailability, Troy T. Huber
Identifying, Tracking, And Prioritizing Parts Unavailability, Troy T. Huber
Theses and Dissertations
The Air Force is pursuing several efficiency initiatives designed to reduce support function costs. One such initiative is an effort to reduce the flow days of items being repaired in the Air Force's organic depots. Many end items are affected by awaiting parts (AWP) delays, which increase total flow days. The first step in reducing AWP delays is to identify which piece parts are causing the delays. A gap analysis was conducted to identify a process for creating a list of piece parts that are causing AWP delays. In addition, a clinimetric method was used to develop an aggregate measure …
Strategic Consolidation Of Medical War Reserve Material (Wrm) Equipment Unit Type Codes (Utc) Assemblages, Chad W. Whitson
Strategic Consolidation Of Medical War Reserve Material (Wrm) Equipment Unit Type Codes (Utc) Assemblages, Chad W. Whitson
Theses and Dissertations
This thesis analyzes the strategic consolidation of medical WRM equipment UTC assemblages located within the contiguous United States. Following a 2003 consolidation assessment, the Air Force Medical Logistics Office (AFMLO) consolidated some of the medical UTCs at three Consolidated WRM Storage and Deployment Centers (CSDC) located at Kelly Field Annex, Travis AFB, and Charleston AFB. While many UTCs were consolidated at that time, currently only 17 of the possible 142 equipment UTC assemblages are entirely consolidated at one of those three locations. After adding three additional bases as possible consolidation locations, this study attempts to minimize the cost of full …
Usaf Aircraft Maintenance Officer Knowledge, Skills And Abilities And Commonalities Among The Logistics Officer Corps, David M. Thompson
Usaf Aircraft Maintenance Officer Knowledge, Skills And Abilities And Commonalities Among The Logistics Officer Corps, David M. Thompson
Theses and Dissertations
This study investigated options to improve 21A training and education by first validating the Air Force's logistics mission sets as Deployment, Distribution, Supply Management, Repair Network Integration, Mission Generation, Lifecycle Logistics and Joint Logistics. Then, the Knowledge, Skills, and Abilities (KSAs) considered important to execute each mission set were gathered from a representative sample of Air Force Logistics Officers via field interviews and focus groups. An analysis of results categorizes probable needs (high, medium, low) of KSAs for each mission set and assesses how well they are currently taught, if at all. Additionally, lists of KSAs that overlap multiple mission …
Vehicle Minimization For The Multimodal Pickup And Delivery Problem With Time Windows, Benjamin A . Clapp
Vehicle Minimization For The Multimodal Pickup And Delivery Problem With Time Windows, Benjamin A . Clapp
Theses and Dissertations
The algorithm proposed here is used for heuristic solutions for the Multimodal Multiple Vehicle Routing Problem with Unloading Capacity, Pickup and Dropoff, and Time Windows, solved so as to minimize the number of vehicles used, subject to varying objective function values for each vehicle. The MVRP is simplified and split into a routing problem and a scheduling problem. The routing problem is addressed by Dijkstra's Algorithm. This generates a new network for the second stage of the algorithm. It is assumed that the shortest path is the correct path to use, and shipments each travel unimodally. The scheduling problem is …
Activity-Based Calculation Models For The Brazilian Air Force Cellular Unit Of Intendancy, Paula Ferreira Da Silva
Activity-Based Calculation Models For The Brazilian Air Force Cellular Unit Of Intendancy, Paula Ferreira Da Silva
Theses and Dissertations
During a military operation, besides providing technological infrastructure and specific weapons, it is also essential to have physical logistics to support the basic needs of troops. To provide this specific care, the Brazilian Air Force (BAF) has the Cellular Unit of Intendancy (CUI). Annually several support operations are planned, and events that cannot be predicted are estimated. Currently, the estimated budget and the report of total costs calculated after missions do not reflect the reality of the CUI expenses. The estimated budget presents values much lower than those presented in the reports of total costs, prepared after finishing each support …
Exploring The Dynamics And Modeling National Budget As A Supply Chain System: A Proposal For Reengineering The Budgeting Process And For Developing A Management Flight Simulator, Christoforos Kalloniatis
Exploring The Dynamics And Modeling National Budget As A Supply Chain System: A Proposal For Reengineering The Budgeting Process And For Developing A Management Flight Simulator, Christoforos Kalloniatis
Theses and Dissertations
In the Science of Economics, there has been a debate about the optimal fiscal and budgetary policy that should be implemented by governments. On the one side, the advocates of the Keynesian Theory assert that in recession times governments should run budgets with deficits, in order to stimulate the economy, while the supporters of the Balanced Budget Theory, on the contrary, underscores the need to reduce and even eliminate the budget deficits. However, previous experience shows that both theories often failed to accomplish their goals, because they underestimated a very sensitive parameter: national budgets are not just an estimate of …
Cng As A Feasible Replacement For The U.S. Transportation Sector, Veysel Uz
Cng As A Feasible Replacement For The U.S. Transportation Sector, Veysel Uz
Theses and Dissertations
For many years there has been much attention on reducing U.S. fuel imports to improve the nation's energy independence. Much of the focus has been on the transportation sector, as it accounts for 28% of total U.S. energy consumption. This thesis examines compressed natural gas (CNG) as a possible alternative fuel for the U.S. transportation sector. To fully explore this possibility, it is essential to understand both the supply and demand sides of the problem. This research examines the availability and adequacy of CNG as a full or partial fuel replacement for U.S. transportation fuels, the factors that prevent CNG …
The Impact Of Supply Chain Business Processes On Competitive Advantage And Organizational Performance, John F. Perry Ii
The Impact Of Supply Chain Business Processes On Competitive Advantage And Organizational Performance, John F. Perry Ii
Theses and Dissertations
Organizational performance has routinely been viewed through a limited scope primarily focused on functions, practices, and resources directly controlled by the focal organization, but supply chain management (SCM) has broadened this scope to incorporate all organizations along the supply chain. This shifted the notion of competition from that of between individual organizations to between supply chains. Supply chain management is an ever growing field; multiple SCM frameworks exist today and are being further developed and defined. Successful firms must reside on the leading edge of management techniques, theories, and practices in order to stay competitive in an ever growing, more …
The Relationship Between Key Supply Chain Process Implementation, Competitive Advantage, & Organizational Performance, Anthonelli White Jr.
The Relationship Between Key Supply Chain Process Implementation, Competitive Advantage, & Organizational Performance, Anthonelli White Jr.
Theses and Dissertations
In spite of an ever-accumulating body of research on the topic of supply chain management (SCM), an agreed upon definition or framework regarding its essential constructs or practices does not exist. There are, however, a few leading academic perspectives on SCM that have been bolstered by the acceptance of industry leaders. One such perspective is that presented by the Global Supply Chain Forum (GSCF). This study applies established survey methods to expand the body of knowledge pertaining to SCM by empirically validating the relationships conceptualized by the GSCF framework through an analysis of the perception of mid-level managers and senior-level …
Examining Express With Simulation, David R. Williams
Examining Express With Simulation, David R. Williams
Theses and Dissertations
The Execution and Prioritization of Repair Support System (EXPRESS) is a database tool used by the Air Force to prioritize depot maintenance of reparable spare parts to maximize responsiveness to warfighter need. Many studies have examined individual portions of EXPRESS, though few have examined it as an entire system. This effort proposes a modeling approach for examining the overall system behavior of EXPRESS using discrete event simulation. The emphasis of the model is to be flexible enough to provide useful insight into system performance, while also remaining open-ended enough to provide a foundation for future expansion and analysis. A case …
A Spreadsheet Model That Estimates The Impact Of Reduced Distribution Time On Inventory Investment Savings: What Is A Day Taken Out Of The Pipeline Worth In Inventory?, Serhat Saylam
Theses and Dissertations
In most of the literature dealing with inventory problems, either with a deterministic or probabilistic model, lead time is viewed as a prescribed constant or a stochastic variable that is not subject to control. But in many practical situations, lead time can be reduced by an extra crashing cost; in other words, it is controllable. This study proposes a repeatable spreadsheet optimization model that estimates the impact of reduced replenishment lead time on inventory investment savings at forward and strategic locations to motivate decision makers to support enterprise-wide distribution process improvement. The study provides users with a means of automatically …
Evaluation Of Inventory Reduction Strategies: Balad Air Base Case Study, Aaron V. Glassburner
Evaluation Of Inventory Reduction Strategies: Balad Air Base Case Study, Aaron V. Glassburner
Theses and Dissertations
The end of military operations in Iraq brought a new set of challenges for Air Force supply professionals as they responsibly reduced levels of assets within the country while supporting on-going missions. This research evaluates two separate supply reduction plans that were implemented at Balad Air Base during the Air Force's final months in the area of operations. The logic of Air Force consumable inventory computations are modeled in detail and historical data from supply records are utilized to evaluate each plan's supportability to different notional fleet sizes. Each plan is evaluated under measures of backorders, backorder quantities, and customer …
An Assessment Tool Of Performance Based Logistics Appropriateness, Korhan G. Yukselen
An Assessment Tool Of Performance Based Logistics Appropriateness, Korhan G. Yukselen
Theses and Dissertations
Performance-Based Logistics (PBL) is the most preferred product support strategy in the Department of Defense. Using performance-based acquisition methods to the maximum extent practicable when acquiring services is mandated. But although PBL should be used whenever feasible, few documents show how to measure its feasibility. The aim of this research is to fill this gap by answering the following question: What factors determine the appropriateness of the selection of PBL as a strategy for a specific acquisition? This study seeks to determine which factors affect success when selecting PBL as an acquisition method. Each factor is examined in detail and …
Agent Based Modeling And Simulation Framework For Supply Chain Risk Management, Tiffany J. Harper
Agent Based Modeling And Simulation Framework For Supply Chain Risk Management, Tiffany J. Harper
Theses and Dissertations
This research develops a flexible agent-based modeling and simulation (ABMS) framework for supply chain risk management with significant enhancements to standard ABMS methods and supply chain risk modeling. Our framework starts with the use of software agents to gather and process input data for use in our simulation model. For our simulation model, we extend an existing mathematical framework for discrete event simulation (DES) to ABMS and then implement the concepts of variable resolution modeling from the DES domain to ABMS and provide further guidelines for aggregation and disaggregation of supply chain models. Existing supply chain risk management research focuses …
A Comparative Study Between U.S. And Brazilian Acquisition Regulations And Practices, Kesia G. Gomes
A Comparative Study Between U.S. And Brazilian Acquisition Regulations And Practices, Kesia G. Gomes
Theses and Dissertations
The researcher undergoes a tripartite comparative analysis approach using: (1) Brazilian Acquisition Law, (2) US Federal Acquisition Regulation and (3) Selected Articles from the European Journal of Purchasing and Supply Management (1996-2010). Specifically, the primary research question is: How does the Brazilian Law 8666/93 compare to the American Federal Acquisition Regulation (FAR/84)? Therefore, an in-depth assessment and analysis of the procurement systems of the United States and Brazil is executed in order to determine the different perspectives and policies adopted by these countries; and how differently each Government perceive the purchase function. An extensive literature review using selected articles from …
Nuclear Enterprise Performance Measurement, Andrew S. Hackleman
Nuclear Enterprise Performance Measurement, Andrew S. Hackleman
Theses and Dissertations
The criticality of the United States Air Force nuclear enterprise demands that commanders have the best possible understanding of system performance, both in the aggregate and at the drill-down levels sufficient to make timely corrective actions when warranted. We model a strategy-linked measurement system for nuclear enterprise sustainment. We propose a new Aggregation "h" method for aggregating performance metrics using United States Air Force approved or adapted metrics that possess the capability to weight metrics, as well as compare performance between organizations and within the same organization over time. We demonstrate our method with generated performance data designed to test …
By Product Synergy Analysis, Francisco Edgardo Leguiza
By Product Synergy Analysis, Francisco Edgardo Leguiza
Theses and Dissertations
The United States Air Forces generates various waste during the repair and overhaul activities. These wastes can involve hazardous material. Depending on the material, technologies exist or could be readily developed to convert wastes into feed-stock for other processes. The old concept of managing material from cradle-to-grave now has evolved into cradle-to-cradle. This concept goes beyond the disposal of waste and can be even more cost-effective than recycling. The objective is to generate "food" by identifying and developing other processes to use current wastes in its own production processes. By shifting from waste disposal to an endless reusing model improves …
Improving Way Of Logistics Management In Korean Army, Sungtae Jung
Improving Way Of Logistics Management In Korean Army, Sungtae Jung
Theses and Dissertations
The objective of this research is to find a way to improve Korean Army Logistics. This is accomplished through interviewing field experts and adopting their ideas to improve it. An interview with the manager of a successful civilian company and relevant literature also gave ideas in improvement. This research is written based on interviews with the logistic officers on different branches and different units in the Korean Army. Through interview with them, this research identified 4 main problems in the current logistics system: 1) multilevel supply support system, 2) inaccurate demand management system, 3) inefficiency of procurement and transportation management, …
The Impact Of Environmental Factors On Internal Integration In Support Of Supply Chain Management, Mohammed I. Alzaben
The Impact Of Environmental Factors On Internal Integration In Support Of Supply Chain Management, Mohammed I. Alzaben
Theses and Dissertations
Despite the recognized importance of cross-functional integration in support of supply chain management by scholars and practitioners, integration remains an elusive goal in today's competitive market. Specifically, scholars have identified three environmental factors as potential barriers to interdepartmental integration. A review of the literature indicates that very little research has examined potential environmental barriers to the integration between logistics and other functions. This paper is an exploratory study that seeks to fill this gap by using secondary data collected from over 1,500 mid-level managers and a structural equations model to test which environmental factors could be potential barriers.
Central Command Rest And Recuperation Hub-To-Hub Airlift Network Analysis, John M. Dickens
Central Command Rest And Recuperation Hub-To-Hub Airlift Network Analysis, John M. Dickens
Theses and Dissertations
The primary purpose of this research effort was to discover the efficiency and effectiveness of the historical hub-to-hub R&R airlift network. This study analyzed the hub-to-hub aircraft efficiency rates and introduced capacity changes in the airlift network with the use of Arena simulation to improve network performance. Furthermore, this study created simple heuristic options for the future airlift framework required to meet USCENTCOM's forecasted R&R transportation demand under the premise of a CY11 country 1 drawdown and an upscale of combat and support forces within country 2. There were several important outcomes of this research effort. First, this study designed …
Contract Over Target Baseline (Otb) Effect On Earned Value Management's Cost Performance Index (Cpi), Dennis E. Jack
Contract Over Target Baseline (Otb) Effect On Earned Value Management's Cost Performance Index (Cpi), Dennis E. Jack
Theses and Dissertations
Cost growth is a problem in U.S. Department of Defense (DoD) acquisitions. A particular component of cost growth is a cost overrun or Over Target Baseline (OTB). In 2009, Trahan found that the Gompertz growth curve better predicted program Estimates at Completion (EAC) for OTB contracts. In 2010, Thickstun studied “the relationships between overruns and a variety of factors,” but found OTB occurrences “random” and questioned the benefit of the OTB process (Thickstun, 2010). In this research, we study OTB‟s ability to effect improved program cost performance; we examine OTB‟s effect on the cumulative Cost Performance Index (CPI) slope after …
Stealthy River Navigation In Jungle Combat Conditions, Fabio Ayres Cardoso
Stealthy River Navigation In Jungle Combat Conditions, Fabio Ayres Cardoso
Theses and Dissertations
One of the biggest challenges for Brazilian military logisticians is to support effective jungle warfare for both real and training operations carried out by their combat forces in the Amazonian region. The jungle's heat, humidity, and dense vegetation put significant demands on the supply chain. Further, because of the difficulties of land or air transportation, water transport is the most reasonable transportation option to sustain these deployed forces. Planners must select from among the available watercourses those whose surroundings provide stealthy navigation to the combat force location where the requested supplies can be safely unloaded. We seek a method of …
Measuring The Effect Of Transportation Uncertainty In The Postponement Strategy, Chang-Sung Kim
Measuring The Effect Of Transportation Uncertainty In The Postponement Strategy, Chang-Sung Kim
Theses and Dissertations
A manufacturing company can postpone production and logistics processes in its supply chain system. The delaying of manufacturing and logistics can eliminate the burden of accurate forecasting of demand and thereby reduce inventory carrying cost. Identical postponement processes cannot be generally implemented because every product has its own characteristics in reference to demand and every company has its own individual production environment. A company needs to find its best postponement strategy to minimize its costs for any certain product. This study applies Pagh and Cooper (1998)’s typology of supply chain postponement/speculation strategies to find the best postponement strategy for a …
Korean Domestic Third Party Logistics Providers: Research For A Global Market, Daewon Kim
Korean Domestic Third Party Logistics Providers: Research For A Global Market, Daewon Kim
Theses and Dissertations
The objective of this thesis is to contribute to the globalization of Korean domestic third party logistics companies. This is accomplished through a benchmarking model for globalization based on a comparative analysis of domestic and global third party logistics provider (3PLs) companies. The research performed a SWOT analysis to identify the capabilities required by Korean domestic 3PLs to become global 3PLs. The research investigated the following areas: 1) global service, 2) infrastructure, 3) supply chain management (SCM) services, and 4) information technology (promptness, visibility). This was accomplished by an extensive literature review, case analysis of logistics companies, and telephone interviews …
Emergency Management Benchmarking Study: Lessons For Increasing Supply Chain Resilience, Jose M. Morais Jr.
Emergency Management Benchmarking Study: Lessons For Increasing Supply Chain Resilience, Jose M. Morais Jr.
Theses and Dissertations
The challenge to manage a business today is bigger than ever, because we cannot think only about our organization, but the intricate network of organizations that form our supply chain. Some organizations cope far better than others with both the prospect and the manifestation of unquantifiable risk -- they share a critical trait: resilience. This study researches emergency management organizations which are required to maintain a state of readiness for immediate reaction, and evaluates best practices in preparedness, detection, response and recovery. Extracting insights from multiple interviews, this research verified that most of the current emergency management best practices do …
Supply Chain Resilience: Assessing Usaf Weapon System Life Cycle, Brian P. Tobin
Supply Chain Resilience: Assessing Usaf Weapon System Life Cycle, Brian P. Tobin
Theses and Dissertations
The Air Force Global Logistics Support Center (AFGLSC) is responsible for the United States Air Force’s supply chain. One of the AFGLSC’s responsibilities is to improve AF supply chain processes. This thesis investigates the subject of supply chain resilience and its potential impact for improving supply chain management. Through literature a supply chain resilience framework and measurement tool was identified for potential benefit to Air Force supply chain management. Air Force weapon systems were identified and segmented into two phases of the weapon system life cycle. This research analyzes data collected on supply chain resilience factors, vulnerabilities and capabilities, for …