Operational Research Commons^™

A Template-Based Conceptual Modeling Infrastructure For Simulation Of Physical Security Systems, Ashu Guru, Paul Savory

Department of Industrial and Management Systems Engineering: Faculty Publications

Although simulation is one of the most innovative and cost-effective tools for modeling and analyzing a system, simulation studies often fail to provide any useful results. One reason is attributed to the fact that model formulation depends on the skills of the analyst. This paper describes a research to develop a conceptual modeling infrastructure to assist a simulation analyst in specifying components for studying physical security systems. The modeling framework has been programmed as an internet-based web application. Using the application, the successful development and implementation of a physical security simulation model will be aided by a defined scientific methodology …

A Case Study Of Teaching A Quantitative Course Using Archived Streaming Video, Paul Savory

Department of Industrial and Management Systems Engineering: Faculty Publications

This case study highlights some of the issues and difficulties experienced in teaching a quantitative course using three methods of delivery: in-class to an audience of students, television broadcast over a satellite system to distance students, and archived streaming video accessible by students. The discussion is applicable to administrators and faculty exploring the option of teaching a course using multiple delivery approaches.

Lean Energy Analysis: Identifying, Discovering And Tracking Energy Savings Potential, J. Kelly Kissock, John Seryak

Mechanical and Aerospace Engineering Faculty Publications

Energy in manufacturing facilities is used for direct production of goods, space conditioning, and general facility support such as lighting. This paper presents a methodology, called lean energy analysis, LEA, for graphically and statistically analyzing plant energy use in terms of these major end uses.

The LEA methodology uses as few as 60 easily obtainable data points. Multivariable change-point models of electricity and natural gas use as functions of outdoor air temperature and production data are developed. The statistical models are used to subdivide plant energy use into facility, space-conditioning and production-related components.

These breakdowns suggest the savings potential from …

A Template-Based Conceptual Modeling Infrastructure For Simulation Of Physical Security Systems, Paul Savory

Department of Industrial and Management Systems Engineering: Faculty Publications

Although simulation is one of the most innovative and cost-effective tools for modeling and analyzing a system, simulation studies often fail to provide any useful results. One reason is attributed to the fact that model formulation depends on the skills of the analyst. This paper describes a research to develop a conceptual modeling infrastructure to assist a simulation analyst in specifying components for studying physical security systems. The modeling framework has been programmed as an internet-based web application. Using the application, the successful development and implementation of a physical security simulation model will be aided by a defined scientific methodology …

Application Of Queuing Theory And Procedure Time Estimation In A Local Healthcare System, Galina Tsoy

Engineering Management & Systems Engineering Theses & Dissertations

People in the United States pay more for their basic healthcare needs than do people in any other nation in the world. When we consider that the United States is the wealthiest nation in the world, controlling the majority of the world's resources, it seems only reasonable to ask: Why should it be this way?

In an effort to address this problem, this thesis examines two possible methods of improving health care efficiency in hospitals. The thesis is thus in two parts: the first part examines resource allocation in medical units using Queuing Theory, and the second part examines a …

Development Of A Systems Engineering Model Of The Chemical Separations Process, Yitung Chen, Sean Hsieh

Separations Campaign (TRP)

The whole chemical separation process is complex to the point that definitely requires certain level of systematic coordination. To perform smoothly and meet the target extraction rates among those processes, this research proposed a general-purpose systems engineering model.

A general purposed systems engineering model, Transmutation Research Program System Engineering Model Project (TRPSEMPro), was developed based on the above design concept. The system model includes four main parts: System Manager, Model Integration, Study Plan, and Solution Viewer. System Manager supervises all the case (problem) creation, and functionality definition. Model Integration identifies chemical extraction processes and their execution sequence. Study Plan is …

Combining Systematic Layout Planning And Computer Simulation In The Design Of Manufacturing Facilities, Akintoye M. Akinyoade

All-Inclusive List of Electronic Theses and Dissertations

In this study, the systematic layout planning (SLP) and computer simulation were combined to improve the layout design of a manufacturing facility using a case study.

Decision Analysis With Value Focused Thinking As A Methodology To Assess Air Force Officer Retention Alternatives, Sang-Ho Moon

Theses and Dissertations

Many countries realize the importance of the retention of qualified military personnel, and have tried to solve this problem using various methods. Nevertheless, the effects of those methods have not been determined or proven yet. The military retention problem is closely related to each individual's separation decision from the military. The characteristics of this decision are multi-objective and highly subjective. Accordingly, the effectiveness of various methods is heavily dependant on the value set of each individual. Decision Analysis (DA) using Value Focused Thinking (VFT) can be an excellent process to deal with this decision. Also, the data can reflect the …

An Investigation Of The Optimal Sensor Ensemble For Sensor Fusion, Paul P. Clemans

Theses and Dissertations

This thesis continues the research begun by Storm, Bauer and Oxley in 2003 into the fusion of classifiers. It examines the fusion of up to three correlated classifiers using three different fusion techniques. The overall objective was to determine the optimal ensemble of classifiers to maximize the expected classification accuracy. The ISOC fusion method (Haspert, 2000), the ROC Within fusion method (Oxley and Bauer, 2002) and a Probabilistic Neural Network were the three fusion techniques employed in these set of experiments. Performance of the classifiers and the fusion methods is measured via ROC curves. Two possible configurations of feature correlations …

Modeling And Analysis Of Post-Conflict Reconstruction, Damon B. Richardson

Theses and Dissertations

The forces at play in reconstruction operations are a complex system of time phased interlocking cause and effect relationships that are not thoroughly understood. A model capable of capturing the general dynamics involved in post-conflict reconstruction would provide insight to decision makers regarding potential policy alternatives. This research effort demonstrates the viability of using systems dynamics modeling techniques to simulate the establishment of public order and safety in a post-conflict reconstruction operation (Phase IV operations). A high level generic framework is developed that can be used as a general template for modeling post-conflict reconstruction. It is then demonstrated with a …

Effects Of Uncertainty On Real World Aerospace Mission Data, Steven J. Barosko

Theses and Dissertations

Uncertainty is an age old element of warfare. How does one measure success or failure on the battlefield? This thesis explores the effect of uncertainty on real world aerospace mission data from Operation Iraqi Freedom (OIF). Sources of uncertainty are identified during data preparation and the effects of uncertainty are investigated using multivariate analysis techniques. Two distinct cases are analyzed: one case with a low level of uncertainty in predicting whether or not a mission is pre-planned or alert generated, and another case with a high level of uncertainty in predicting whether or not a mission is a success or …

Agent Based Simulation Seas Evaluation Of Dodaf Architecture, Gregory V. Destefano

Theses and Dissertations

With Department of Defense (DoD) weapon systems being deeply rooted in the command, control, communications, computers, intelligence, surveillance, and reconnaissance (C4ISR) structure, it is necessary for combat models to capture C4ISR effects in order to properly assess military worth. Unlike many DoD legacy combat models, the agent based model System Effectiveness and Analysis Simulation (SEAS) is identified as having C4ISR analysis capabilities. In lieu of requirements for all new DoD C4ISR weapon systems to be placed within a DoD Architectural Framework (DoDAF), investigation of means to export data from the Framework to the combat model SEAS began. Through operational, system, …

An Investigation Of The Effects Of Correlation, Autocorrelation, And Sample Size In Classifier Fusion, Nathan J. Leap

Theses and Dissertations

This thesis extends the research found in Storm, Bauer, and Oxley, 2003. Data correlation effects and sample size effects on three classifier fusion techniques and one data fusion technique were investigated. Identification System Operating Characteristic Fusion (Haspert, 2000), the Receiver Operating Characteristic Within Fusion method (Oxley and Bauer, 2002), and a Probabilistic Neural Network were the three classifier fusion techniques; a Generalized Regression Neural Network was the data fusion technique. Correlation was injected into the data set both within a feature set (autocorrelation) and across feature sets for a variety of classification problems, and sample size was varied throughout. Total …

Modeling And Simulation Of The Military Intelligence Process, Carl R. Pawling

Theses and Dissertations

There is concern within U.S. space and intelligence organizations that the current Tasking, Processing, Exploitation, and Dissemination processes may be insufficient to support current and future Intelligence, Surveillance, and Reconnaissance systems. As part of a larger intelligence process, more detailed analysis becomes critical to determine what portions need to be improved. This analysis can be accomplished by simulation, which is appropriate due to the complexity of the process and the ability to compare variations in the process. We construct a high level model of a generalized military intelligence process based in part on the Intelligence Cycle outlined in Joint Publications. …

Age Replacement And Service Rate Control Of Stochastically Degrading Queues, Patrick S. Chapin

Theses and Dissertations

This thesis considers the problem of optimally selecting a periodic replacement time for a multiserver queueing system in which each server is subject to degradation as a function of the mean service rate and a stochastic and dynamic environment. Also considered is the problem of optimal service rate selection for such a system. In both cases, the performance metric is the long-run average cost rate. Analytical expressions are obtained, in terms of Laplace transforms, for the nonlinear objective functions, necessitating the use of numerical Laplace transform inversion to evaluate candidate solutions in conjunction with standard numerical algorithms. Due to the …

Value-Focused Thinking In The Presence Of Weight Ambiguity: A Solution Technique Using Monte Carlo Simulation, Timothy W. Porter

Theses and Dissertations

When a Decision Maker is asked to provide his or her preferences, the response represents a snapshot in time. While their preference structure elicited at any given moment may represent their revealed preferences at that point in time, it may change over time. These changing preferences over time represent ambiguity in the decision maker's preferences. Other sources of ambiguity may exist. One weakness of many decision analysis techniques today is the inability to incorporate ambiguity into the basic decision model. The existence of the problem has been known and commented on for many years. This research addresses that problem. It …

Selected Collaborative Problem-Solving Methods For Industry, Dr. Anthony Mark Doggett

Architectural and Manufacturing Sciences Faculty Publications

Despite the availability of a wide range of problem solving methods, individuals continue to struggle with problems. Scientists attempt to address recurring economic, social, political, and organizational problems through the expansion of knowledge and theory. ... Cause-effect relationships advance logical explanations, predict future events,and forecast consequences. Theories and thinking based on cause-effect findings become recognized science (Goldratt, 1990) and move the field of inquiry from "art" to that of disciplined examination. In problem solving, the root cause of the problem produces an undesirable effect. Any pursuit that does not seek the root cause leads only to the symptom of the …

Writing Reflective Case Studies For The Engineering Management Journal (Emj), Timothy Kotnour, Rafael Landaeta

Engineering Management & Systems Engineering Faculty Publications

This paper's intent is to help authors write reflective case studies for the Engineering Management Journal (EMJ). We offer a process to convert an applied research project with an organization to an EMJ manuscript. Writing a reflective case study is a process of abstracting experiences into approaches, processes, tools, challenges, and "lessons" for a broad audience of engineering managers. This paper serves as a guide for authors to write reflective case studies.

Deciding On The Appropriateness Of B2b Reverse Auction Technology Adoption: An Ahp Approach Combined With Integer Programming, Tobias Schoenherr

Journal of International Technology and Information Management

Although Business-to-Business online reverse auctions have emerged as a promising purchasing tool, no research has been found that provides a model to assess the reverse auction decision in a systematic way. This paper fills this gap by presenting an integrated approach, utilizing Analytic Hierarchy Process techniques and an Integer Programming Formulation, to decide whether Reverse Auction Technology (RAT) adoption is cost-effective and appropriate. The model developed is a practical decision support tool that allows for the consideration of both qualitative and quantitative decision factors, and for the adoption of multiple modes of RATs, which are contrasted to traditional purchasing.

Studying The Value Of Information Sharing In E-Business Supply Chain Management, Aryya Gangopadhyay, Zhensen Huang

Journal of International Technology and Information Management

The supply chain management of goods and services involves multiple trading partners such as raw-material suppliers, manufacturers, distributors, and retailers. Every one of these trading partners need to determine their requirements, in terms of merchandise, and match them against availability, pricing, and cost of transportation. At every step of the supply chain economics information retrieval is a crucial and recurring process. In this paper we study information sharing as a strategy for improved decision making that can increase the profitability of the entire supply chain. We describe various different models for information sharing and illustrate the benefits of information sharing …

Improving Workflow In Home Healthcare Industry: A Case Study, Mohan Rao, Norma Teran, Michael Savard

Journal of International Technology and Information Management

Home healthcare industry is facing increasing pressure to change business processes and manage information flow electronically. With the help of a case example, this paper describes how a web- based system could improve the workflow communication problems in home healthcare companies. Every department of the case company has its own software to assist in everyday operations but is unable to communicate with one another electronically. All documents necessary in the coordination of care have to move physically between departments. The proposed solution is a web-based electronic form management system that would improve regulatory compliance and operating efficiency.

Customer Relationship Management (Crm): A Comparative Study Between U.S.A. And Spain, Jesus Garcia De Madariaga

Journal of International Technology and Information Management

This paper surveys the marketing executives of the top companies in Spain with more than 100 million euros on net sales and reports the status of Customer Relationship Management (CRM) solutions in their companies. The results are compared with the U.S.A. status reported by a previous study developed by InformationWeek Research in 2000 with a sample based on Fortune 500. One hundred and thirty-six companies participated in this study. The data provides insights into the strengths and weaknesses of the CRM in Spain in comparison with USA. Some viable actions are recommended to improve the usage of CRM and to …

Building Data Warehouses Using The Enterprise Modeling Framework, Joseph O. Chan

Journal of International Technology and Information Management

This paper proposes an enterprise modeling framework for the deployment of data warehouses. The framework provides the information roadmap coordinating source data and different data warehouses across the business enterprise. The paper introduces a solution to address data warehousing issues at the enterprise level while avoiding the pitfalls of creating enterprise data warehouses and universal data marts. It further proposes a change of paradigm from point solutions focus to a methodology driven by enterprise requirements to meet the challenges of the new economy. The proposed framework emphasizes the separation of the conceptual construct from the physical and operational constructs of …

Web-Services – The Next Evolutionary Stage Of E-Business, Santosh S. Venkatraman

Journal of International Technology and Information Management

Web-Services are a set of new technologies that promise to take “service-oriented” distributed computing to a whole new level, and eventually take e-business to the next evolutionary stage. Web-Services, in a nutshell, let organizations bridge communication gaps among their information systems, and build new software applications by “stitching” together existing ones. It is capable of integrating applications written in different programming languages, developed by different vendors, and running on different servers with dissimilar operating systems. Web- Services would enable companies to seamlessly connect their information systems and business processes with those of their partners and customers – thus ushering in …

Fee -Based Online Services : Exploring Consumers’ Willingness To Pay, L. Richard Ye, Yue Zhang, Dat-Dao Nguyen, James Chiu

Journal of International Technology and Information Management

Many online service businesses are beginning to charge fees for services that they used to provide for free. It is unclear whether consumers are ready to embrace this practice. This study explores consumer attitudes toward fee-based online services. The results of the study indicate that consumers’ willingness to pay for online services is likely to be influenced by their perceived value of convenience these services provide, and by the extent to which they utilize these services. While consumers appear more willing to pay for services that are qualitatively better than free services, there is also indication that the belief remains …

A Study Of The Relationship Between Internet Diffusion And Culture, Ravi Nath, N.R. Vasudeva Murthy

Journal of International Technology and Information Management

The unevenness in the diffusion rates of the Internet across nations is commonly referred to as the “digital divide.” Technological, economic and political factors are often mentioned as the primary contributing factors to this digital gap. However, there is sufficient evidence in support of the proposition that a nation’s culture also plays a role in how citizens adopt and use technology innovations. This paper examines the relationship between the cultural dimensions proposed by Hofstede and the Internet adoption rate of nations. Data from sixty-two countries are used to establish a regression model and the empirical results show that cultural traits …

A Conceptual Framework For E-Branding Strategies In The Non-Profit Sector, Horst Treiblmaier, Irene Pollach, Arne Floh

Journal of International Technology and Information Management

E-branding provides non-profit organizations (NPOs) with new opportunities to communicate their missions, which is of paramount importance in a market segment that competes for donations and voluntary labor. Since successful e-branding is determined by both internal and external communication strategies, we developed a framework which explains the interdependency of these two factors in NPOs. Our findings are based on qualitative interview data and a website analysis of eleven Austrian NPOs. The NPOs' internal and external e-communication strategies are categorized into three successive levels each and combined in a two-dimensional grid, which shows how NPOs integrate their communication strategies.

Xml: Gateway For Data Mobility And Universal Connectivity, Emmanuel Uzoma Opara

Journal of International Technology and Information Management

Extensible Markup Language (XML) started as an effort to simplify the standard Generalized Markup Language (SGML), which was the International Organization for Standardization’s (ISO) standard for defining data vocabularies. This study investigates XML technology as a substitute to SGML that would be Web friendly, and easy to learn and use while supporting a variety of applications for faster and more efficient data mobility on the Web. It describes several compelling reasons why XML is a useful technology for representing structured data mobility. XML is a markup language used for data structure in a textual form. A specific goal of XML …

The Impacts Of Conflicts On Requirements Uncertainty And Project Performance, Houn-Gee Chen, James J. Jiang, Jun-Cheng Chen, J T. Shim

Journal of International Technology and Information Management

Conflict is a pervasive phenomenon that permeates information systems development and implementation. The literature has indicated that conflicts, due to their association with negative emotion, will negatively influence IS project development, even after controlling for the effects of conflict management and resolution; however, the negative emotional characteristic of conflict alone has a limited explanatory power of IS project success. The purpose of this study is to provide additional insight, by including requirement uncertainty as the mediator variable, of the impacts of conflicts on project performance. Surveys were sent to Taiwan’s top 1600 companies and the results support the hypotheses. The …

Empirical Evidence Of Diminishing Payoff From Successive Generations Of Information Systems, Gerald E. Evans, Neil Morton

Journal of International Technology and Information Management

Previous research has focused on a number of important variables that can influence the observed payoffs from information systems investments. In the current investigation conducted in the spring of 2002, personal, on-site interviews were conducted in 138 small and medium sized businesses. Vendor involvement in systems development was less related to systems cost than previously. Unfortunately, vendor involvement was unrelated to any of the four measures of systems success in the entire sample. Further analysis revealed a strong relationship between information system generation and payoffs. Specifically, there appeared to be a point of diminishing return with subsequent generations of information …