Operations and Supply Chain Management Commons^™

Analysis Of Air Force Compliance With Executive Order 13149, John C. Kirkwood

Theses and Dissertations

The Air Force must comply with Executive Order (E.O.) 13149: Greening The Government Through Federal Fleet and Transportation Efficiency. This order focuses on the reduction of petroleum consumption in an effort to reduce dependence on foreign oil and preserve the environment. Specifically, it directs federal agencies (such as the Air Force) to reduce fuel use in the vehicle fleet 20 percent between Fiscal Years (FY) 1999 and 2005. This thesis examines the Air Force's current alternative fuel vehicle (AFV) program and its evolution to determine how effective it is and how it should be adjusted to promote compliance with E.O. …

A Performance Evaluation Of A Lean Reparable Pipeline In Various Demand Environments, Melvin E. Maxwell Jr.

Theses and Dissertations

Lean production and logistics processes were developed in the commercial sector to reduce total system costs of production while simultaneously providing high levels of customer service, increased productivity, and increased worker utilization, In 1993, the Air Force instituted the Lean Logistics program, which successfully implemented some commercial lean principles, enabling a reduction in the total reparable asset material requirement for the Air Force reparable asset pipeline. The Air Force is attempting to further implement lean production principles into depot repair in hopes of further enhancing reparable asset pipeline cost and customer service performance. However, the failure of reparable assets, which …

Purchasing And Supply Chain Management Costing: An Air Transport Perspective Derived Through Commercial Air Cargo Firms, Kurt Ettrich

Theses and Dissertations

The Air Force has struggled to completely understand the costs associated with its operations. The issue of understanding cost is complex, involving many perspectives, methods and techniques. When examined from a broad standpoint, total supply chain costs can include a firm's costs plus upstream and downstream costs. This perspective takes vendors, suppliers and end customers into consideration. From this broad standpoint, the Air Force does not know its total supply chain cost. Since the Air Force's supply chain is too broad to be a focus of this study, a smaller segment was chosen for a closer look. Specifically, air cargo …

Air Force Materiel Command: A Survey Of Performance Measures, Marcia Leonard

Theses and Dissertations

Performance measurement has long been a matter of debate in logistics. However, in the recent past, there has been a renewed emphasis as AF leaders continue to seek funding for weapon system spares despite marginal improvements in mission capability. The Chief's Logistics Review, Logistics Transformation Program, AFMC Constraints Assessment Program, the Spares Requirement Review Board, the Spares Campaign, and the Depot Maintenance Reengineering and Transformation all represent efforts to find and implement effective answers (RAND, 2003:ix). And, while there appears to be a consensus that better performance measures are needed, there is little agreement on exactly what should be measured, …

The Operational Impact Of Mobility Readiness Spares Package Configuration During Operation Iraqi Freedom, Dianna Smith

Theses and Dissertations

Utilizing the Aircraft Sustainability Model (ASM), Air Force logisticians must determine the best possible number and mix of spares and repair parts for each deployable readiness spares package, better known as a mobility readiness spares package (MRSP). By analyzing MRSP support for Operation IRAQI FREEDOM (OIF), Air Force leadership can have a current picture of MRSP operational effectiveness and mission support capabilities. This research focused on determining the current configuration of MRSPs for OIF by selecting a representative array of MRSPs and supported weapon systems actively involved in OIF, and obtaining relevant support effectiveness measures. Measures selected for analysis were …

Mitigating Growth Cost For Mobility Readiness Spares Packages, Stephen D. Gray

Theses and Dissertations

A Mobility Readiness Spares Package (MRSP) is an air-transportable package of spare parts configured for rapid deployment in support of conflict or war. Each package is tailored to support a specific scenario, for a specific type and number of aircraft without re-supply for the first 30 days of deployment. Inventory is limited to mission-critical spares. The high cost of airlift and spares drive a necessity to keep MRSPs as small as possible, yet robust enough to meet wartime goals. Historical MRSP inventories exhibit significant volatility and the subsequent growth of their inventory creates significant cost to the Air Force. Annual …

Customer-Focused Business Practice Adoption: A Comparison Of Private And Public Sector Implementations, James P. Swisher

Theses and Dissertations

This thesis evaluates a variety of documented cases of customer-focused business practice initiatives to discern common principles of implementation within the private and public sectors. The business practices Quality, Activity-Based Costing (ABC), Customer Profitability Analysis (CPA), and Customer Relationship Management (CRM) were found to be the major techniques utilized over the past three decades. Cases were collected which documented implementation of these customer-focused business practices in the private and public sectors. Using grounded theory methodology, the implementations were analyzed for emerging concepts. The concepts uncovered in this study were further analyzed through a comparison of private and public sector implementations. …

Location Optimization Of Continental United States Strip Alert Sites Supporting Homeland Defense, Jon A. Eberlan

Theses and Dissertations

With the dissolution of the Warsaw Pact and the fall of the Soviet Union, the number of alert aircraft dwindled to 14 aircraft located at 7 sites on September 11, 2001. After the terrorist attacks on the World Trade Center Towers and the Pentagon, the United States could not continue to endorse an outward looking air defense strategy. Terrorism completely changed the landscape of the air defense mission. This research develops a location optimization model to optimally locate alert sites post-11 September to cover areas of interest in the CONUS. The model finds the minimum number of alert sites, minimum …

Solving Hierarchical Constraints Over Finite Domains With Local Search, Martin Henz, Roland H.C. Yap, Yun Fong Lim, Seet Chong Lua, J. Paul Walser, Xiao Ping Shi

Research Collection Lee Kong Chian School Of Business

Many real world problems have requirements and constraints which conflict with each other. One approach for dealing with such over-constrained problems is with constraint hierarchies. In the constraint hierarchy framework, constraints are classified into ranks, and appropriate solutions are selected using a comparator which takes into account the constraints and their ranks. In this paper, we present a local search solution to solving hierarchical constraint problems over finite domains (HCPs). This is an extension of local search for over-constrained integer programs WSAT(OIP) to constraint hierarchies and general finite domain constraints.The motivation for this work arose from solving large airport gate …

Organic Production Systems: What The Biological Cell Can Teach Us About Manufacturing, Lieven Demeester, Knut Eichler, Christoph H. Loch

Research Collection Lee Kong Chian School Of Business

Biological cells run complicated and sophisticated production systems. The study of the cell's production technology provides us with insights that are potentially useful in industrial manufacturing. When comparing cell metabolism with manufacturing techniques in industry, we find some striking commonalities, but also some important differences. Like today's well-run factories, the cell operates a very lean production system, assures quality at the source, and uses component commonality to simplify production. While we can certainly learn from how the cell accomplishes these parallels, it is even more interesting to look at how the cell operates differently. In biological cells, all products and …

Analysis Of The Current Air Force-Specific Status Of Resources And Training System (Sorts) Reporting System, Tia A. Jordan

Theses and Dissertations

The status of resources and training system (SORTS) is a process that measures the health of units and wings in day-to-day preparedness and the ability to execute a major theater war or other scenario envisioned in the national security strategy. With talk of the current reporting system not accurately reflecting units readiness, it is time to evaluate the system to identify key problems and re-design the process to better reflect units capabilities. The objective of this thesis was to inform Air Force leadership of the current state of the SORTS system to ensure it was adequate. By surveying current MAJCOM, …

An Analysis Of The Impact Of Base Support Resources On The Availability Of Air Mobility Command Aircraft, Christian E. Randall

Theses and Dissertations

The AMC Directorate of Logistics is responsible for ensuring AMC aircraft are available to accomplish the mission. Currently, however, the organization lacks an objective tool for assessing the impact of proposed operations on the health of the fleet, To improve this process, the Directorate has initiated the development of a Mobility Aircraft Availability Forecast (MAAF) simulation model designed to identify alternatives and associated impacts on aircraft availability, manpower, and cost. This research seeks to assist the MAAF development effort by identifying and demonstrating how different base support factors impact the availability of AMC aircraft. To address this research objective, multiple …

An Analysis Of Depot Repair Capacity As A Criterion In Transportation Mode Selection In The Retrograde Movement Of Reparable Assets, Harold M. Kahler

Theses and Dissertations

To support smaller reparable asset inventories, current Air Force supply and transportation policies direct the expedited evacuation of reparables by bases and deployed units to the source of repair. Mode selection is based on the asset. Focusing on the asset and moving it quickly is an efficient and effective method of getting assets to where they are needed in a timely manner in the forward portion of the supply pipeline. However, in the reverse portion of the pipeline, the demand for a particular type of asset may no longer be the most important factor in how it is transported. The …

Benefits From Funding The Msd Engineering List: A Fiscal Year 1999 Case Study, David L. Gehrich

Theses and Dissertations

Every year the Air Force Material Command (AFMC) funds the MSD Engineering list. The projects on the list are submitted by the Air Logistic Centers in order to address problems with the maintainability or reliability of a reparable part. AFMC funds the projects to determine the root cause of the problem and find the best solution to fix the part. Since the MSD Engineering list is funded in order to improve maintainability and reliability, not as a cost savings initiative, the actual benefits gained from the funds spent on the MSD Engineering list have not been identified. This thesis uses …

Comparative Functional Analysis Of Air Force And Commercially Available Transportation Information Management Systems, Patrick S. Holland

Theses and Dissertations

The Air Force currently relies on two transportation information management systems for managing cargo and passenger movements throughout the Defense Transportation System. The two systems are Global Air Transportation Execution System (GATES) and Cargo Movement Operations System (CMOS). Although GATES and CMOS have evolved from legacy systems created during the 1980s, both systems are used to process cargo and passengers while providing the information needed to maintain in-transit visibility (ITV) and manage each movement. The purpose of this research is to identify commercially available logistics software packages and determine whether they provide the same functionality as the two Air Force …

Prepositioned Trailers For Aircraft Battle Damage Support, Scott M. Murray

Theses and Dissertations

Air superiority is essential in today's wartime environment. Aircraft that are damaged and not returned to combat can have a considerable impact on the quest for dominance in the air. To maintain operational effectiveness, an organization must have the capability to quickly repair damaged aircraft. The purpose of an Aircraft Battle Damage Repair (ABDR) program is to rapidly and effectively repair damaged aircraft to fly additional operational sorties and further contribute to wartime objectives. This capability must consist of providing the necessary tools and equipment for the rapid repair of aircraft. When an ABDR team deploys in support of an …

Supply Chain Management In Humanitarian Relief Logistics, William K. Rodman

Theses and Dissertations

Hundreds of millions of people are affected by disasters each year. This thesis explores the use of supply chain management techniques to overcome the barriers encountered by logistics managers during humanitarian relief operations. Using grounded theory methodology, barriers were analyzed based on academic, organizational, and contemporary literature. Possible solutions to these barriers were selected from available supply chain management literature. This work is different from others in that it marries supply chain principles from different disciplines (including private, nonprofit, and military sectors) to benefit humanitarian operations. It also serves to advance the body of knowledge on this subject so that …

Closed-Loop Supply Chain Models With Product Remanufacturing, R. Canan Savaskan, Shantanu Bhattacharya, Luk N. Van Wassenhove

Research Collection Lee Kong Chian School Of Business

The importance of remanufacturing used products into new ones has been widely recognized in the literature and in practice. In this paper, we address the problem of choosing the appropriate reverse channel structure for the collection of used products from customers. Specifically, we consider a manufacturer who has three options for collecting such products: (1) she can collect them herself directly from the customers, (2) she can provide suitable incentives to an existing retailer (who already has a distribution channel) to induce the collection, or (3) she can subcontract the collection activity to a third party. Based on our observations …

Constraint Programming For Scheduling, John J. Kanet, Sanjay L. Ahire, Michael F. Gorman

MIS/OM/DS Faculty Publications

Our goal is to introduce the constraint programming (CP) approach within the context of scheduling. We start with an introduction to CP and its distinct technical vocabulary. We then present and illustrate a general algorithm for solving a CP problem with a simple scheduling example.

Next, we review several published studies where CP has been used in scheduling problems so as to provide a feel for its applicability. We discuss the advantages of CP in modeling and solving certain types of scheduling problems. We then provide an illustration of the use of a commercial CP tool (OPL Studio) in modeling …

Institutional Factors Influencing E-Business Adoption, Anand Jeyaraj, Deborah Balser, Charles Chowa, Gary Griggs

ISSCM Faculty Publications

Studies of e-business adoption have generally been restricted to understanding organizational factors. Institutional factors provide an alternate explanation of the diffusion of e-business across organizations. We test the influence of coercive, normative, and mimetic pressures on first-time adoption of B2B and B2C innovations by organizations. We further propose that an organization’s response to institutional pressures may be affected by its distinctive organizational identity. Specifically, we hypothesize that those organizations that value innovation and customer service will be more likely to adopt e-business over time. We test the likelihood that the intensity of institutional pressures will vary over different time periods. …

Understanding The Relationship Between Organizational And Individual Adoption Of It Innovations: Literature Review And Analysis, Anand Jeyaraj, Joseph Rottman, Mary Lacity

ISSCM Faculty Publications

Researchers who study IT innovations aim to understand the relationship between two different loci of adoption1 – individual adoption and organizational adoption. A first step is diagnosis of the current state of empirical research on IT innovation adoption. We analyzed 486 relationships between independent variables (IVs) and dependent variables (DVs) found in 89 empirical studies of which 45 studied individual adoption and 44 studied organizational adoption. We categorized 135 IVs into 4 classes (organizational variables such as top management support, individual variables such as age, innovation variables such as relative advantage, and environment variables such as external pressure). We classified …

Attaining A World Class Supply Management Organization Through Strategic Initiatives, Peter O'Reilly

Publications

Goals of a World Class Supply Management Organization:

• One Supply Management Voice
• Create a Collaborative Team Environment
• Control 90% of Enterprise-wide Spend
• Achieve Expense to Savings Ratio of 8:1 or Higher
• Integrate Technology
• Establish Metrics

Problems/Hurdles:

• Lack of ResourcesNo Direction (Vision or Plan)
• Too much transactional work to overcome or “I do not have time to think, much less plan”
• Corporate Culture or History
• Organizational Structure

Goals Of A World Class Supply Management Organization, Peter O'Reilly

Publications

The presentation Goals of a World Class Supply Management Organization discusses the following problems/hurdles:

• Lack of Resources
• No Direction (Vision or Plan)
• Too much transactional work to overcome or “I do not have time to think, much less plan”
• Corporate Culture or History
• Organizational Structure

Heuristics For A Brokering Set Packing Problem, Yunso Guo, Andrew Lim, Brian Rodrigues, Yi Zhu

Research Collection Lee Kong Chian School Of Business

In this paper we formulate the combinatorial auction brokering problem as a Set Packing Problem (SPP) and apply a simulated annealing heuristic to solve SPP. Experimental results are compared with a recent heuristic algorithm and also with the CPLEX Integer Programming solver where we found that the simulated annealing approach outperforms the previous heuristic method and CPLEX obtaining results within smaller timescales.

Metaheuristics With Local Search Techniques For Retail Shelf-Space Optimization, Andrew Lim, Brian Rodrigues, Xingwen Zhang

Research Collection Lee Kong Chian School Of Business

Efficient shelf-space allocation can provide retailers with a competitive edge. While there has been little study on this subject, there is great interest in improving product allocation in the retail industry. This paper examines a practicable linear allocation model for optimizing shelf-space allocation. It extends the model to address other requirements such as product groupings and nonlinear profit functions. Besides providing a network flow solution, we put forward a strategy that combines a strong local search with a metaheuristic approach to space allocation. This strategy is flexible and efficient, as it can address both linear and nonlinear problems of realistic …

Operational Hedging: A Review With Discussion, Onur Boyabatli, L. Beril Toktay

Research Collection Lee Kong Chian School Of Business

Motivated by the increasing prevalence of operational hedging in corporate-level risk management programs, this paper provides an extensive overview and synthesis of the existing literature on operational hedging. In particular, we focus on the treatment of operational hedging in the operations management literature. We then explore how the concept of operational hedging is studied in the fields of finance, strategy and international business. Finally, we discuss and critique the approaches adopted in the operations management literature in the context of the broader literature on the topic.

Nurse Rostering Problems: A Bibliographic Survey, Brenda Cheang, Haibing Li, Andrew Lim, Brian Rodrigues

Research Collection Lee Kong Chian School Of Business

Hospitals need to repeatedly produce duty rosters for its nursing staff. The good scheduling of nurses has impact on the quality of health care, the recruitment of nurses, the development of budgets and other nursing functions. The nurse rostering problem (NRP) has been the subject of much study. This paper presents a brief overview, in the form of a bibliographic survey, of the many models and methodologies available to solve the NRP.

Manpower Allocation With Time Windows And Job Teaming Constraints, Xi Li, Yan Zhi Li, Andrew Lim, Brian Rodrigues

Research Collection Lee Kong Chian School Of Business

In the Manpower Allocation Problem with Time Windows and Job-Teaming Constraints (MAPTWTC), we have a set of jobs located at various locations where each job requires a team of workers. Each job has a time window and a job duration, during which everyone on the team has to be present. The job requirement is satisfied if and only if the required composite team works for long enough duration within the job's time window. The objective of the problem is find a schedule to minimize a weighted sum of the total number of workers, the total travelling distances of all workers …

A Framework For Evaluating Supply Chain Performance, Terrance L. Pohlen

Journal of Transportation Management

Managers require measures spanning multiple enterprises to increase supply chain competitiveness and to increase the value delivered to the end-customer. Despite the need for supply chain metrics, there is little evidence that any firms are successfully measuring and evaluating interfirm performance. Existing measures continue to capture intrafirm performance and focus on traditional measures. The lack of a framework to simultaneously measure and translate interfirm performance into value creation has largely contributed to this situation. This article presents a framework that overcomes these shortcomings by measuring performance across multiple firms and translating supply chain performance into shareholder value.

Balancing The Logistics Cost-Of-Service Equation In An Increasingly Uncertain Business Environment, Kay Dobie, Jerry Wilson

Journal of Transportation Management

The emphasis in the press, trade publications, and even academic publications is increasingly on supply chain operations, collaboration, and software. There is no argument that these are important considerations as companies struggle to compete in highly competitive markets and an economically difficult environment. This emphasis on “lean” or “JIT” operations presupposes the ability of the firm to operate on a minimum level of inventory and deliver a high level of service. Too often, the basic and vital interdependency between transportation and inventory, necessary to support this objective, is forgotten in the emphasis on the total picture as embodied by the …