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Title: Inventory Management Problem for Cold Items with Environmental and Financial Considerations.
Creator: Hajiaghabozorgi, Ali, Pazour, Jennifer, Karwowski, Waldemar, Zheng, Qipeng, Nazzal, Dima, University of Central Florida
Abstract / Description: The overarching theme of this dissertation is analytically analyzing the cold supply chain from a financial and environmental perspective. Specifically, we develop inventory policy models in the cold supply chain that consider holding and transportation unit capacities. The models provide insights for the decision maker on the tradeoff between setting order quantities based on the cost or the emission function.In Chapter 2, we review two major bodies of literature: 1) supply chain design, and...
Show moreThe overarching theme of this dissertation is analytically analyzing the cold supply chain from a financial and environmental perspective. Specifically, we develop inventory policy models in the cold supply chain that consider holding and transportation unit capacities. The models provide insights for the decision maker on the tradeoff between setting order quantities based on the cost or the emission function.In Chapter 2, we review two major bodies of literature: 1) supply chain design, and 2) sustainability in supply chain design. We benefit from this literature review to map the current body of research on traditional supply chain for further comparison with the cold supply chain. Sustainability in supply chain network design is often measured by the carbon footprint; other sustainability metrics such as water footprint and sustainable energy are not included. Literature on supply chain design can be further broken down into its three major components: 1) facility location/allocation, 2) inventory management, and 3) facility location/allocation combined with inventory management. In Chapter 3, we study and present an overview of the cold chain. In accordance to the three levels of supply chain management decision making, the study is divided into the following three sections: (1) strategic level, (2) tactical level, and (3) operational level. Specifically, we capture how these decisions will impact the three main components of sustainability: economic, environmental, and social components. In addition, we explain how these components are different in the cold chain, in comparison to the traditional supply chain, and why such unique differences are worth studying. The intent of this chapter is to provide an overview of cold chains and to identify open areas for research. Examples from industrial cases, in addition to data and information from white papers, reports and research articles are provided.In Chapter 4, the cold item inventory problem is formulated as a single-period model that considers both financial and emissions functions. A new formulation for holding and transportation cost and emission is proposed by considering unit capacity for holding and transportation. This model applies to cold items that need to be stored at a certain, non-ambient temperature. Holding cold items in a warehouse is usually done by dividing the warehouse into a set of cold freezer units inside rather than refrigerating the entire warehouse. The advantage of such a design is that individual freezer units can be turned off to save cost and energy, when they are not needed. As a result, there is a fixed (setup) cost for holding a group of items, which results in a step function to represent the fixed cost of turning on the freezer units, in addition to the variable cost of holding items based on the number of units held in inventory. Three main goals of studying this problem are: 1) deriving the mathematical structure and modeling the holding and transportation costs and environmental functions in cold chains, 2) proposing exact solution procedures to solve the math models, and 3) analyzing the tradeoffs involved in making inventory decisions based on minimizing emissions vs. minimizing cost in cold chains.This problem demonstrates the tradeoff between the cost and the emission functions in an important supply chain decision. Also, the analytical models and solution approaches provide the decision maker with analytical tools for making better decisions.In Chapter 5, we expand the developed model from Chapter 4 to include multiple types of products. We consider a group of products that share capacities as a family of products. According to the problem formulation, we have two types of decision variables: (1) determining if a product is a member of a family or not, and (2) how much to order and how frequently to order for products within each family. We propose a solution procedure in accordance with the decision variable types: (1) a procedure for grouping (partitioning) the products into different families, and (2) a procedure to solve the inventory problem for each family. A set of experiments are designed to answer a number of research questions, and brings more understandings of the developed models and solutions algorithms.Finally, the conclusions of this dissertation and suggestions for future research topics are presented in Chapter 6.
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Date Issued: 2014
Identifier: CFE0005501, ucf:50365
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0005501

Title: VIRTUALIZATION AND SELF-ORGANIZATION FOR UTILITY COMPUTING.
Creator: Saleh, Mehdi, Marinescu, Dan, University of Central Florida
Abstract / Description: We present an alternative paradigm for utility computing when the delivery of service is subject to binding contracts; the solution we propose is based on resource virtualization and a self-management scheme. A virtual cloud aggregates set virtual machines to work in concert for the tasks specified by the service agreement. A first step for the establishment of a virtual cloud is to create a scale-free overlay network through a biased random walk; scale-free networks enjoy a set of remarkable...
Show moreWe present an alternative paradigm for utility computing when the delivery of service is subject to binding contracts; the solution we propose is based on resource virtualization and a self-management scheme. A virtual cloud aggregates set virtual machines to work in concert for the tasks specified by the service agreement. A first step for the establishment of a virtual cloud is to create a scale-free overlay network through a biased random walk; scale-free networks enjoy a set of remarkable properties such as: robustness against random failures, favorable scaling, and resilience to congestion, small diameter, and average path length. Constrains such as limits on the cost of per unit of service, total cost, or the requirement to use only "green" computing cycles are then considered when a node of this overlay network decides whether to join the virtual cloud or not. A VIRTUAL CLOUD consists of a subset of the nodes assigned to the tasks specified by a Service Level Agreement, SLA, as well as a virtual interconnection network, or overlay network, for the virtual cloud. SLAs could serve as a congestion control mechanism for an organization providing utility computing; this mechanism allows the system to reject new contracts when there is the danger of overloading the system and failing to fulfill existing contractual obligations. The objective of this thesis is to show that biased random walks in power law networks are capable of responding to dynamic changes of the workload in utility computing.
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Date Issued: 2011
Identifier: CFE0003725, ucf:48768
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003725

Title: Crash quality- an approach for evaluating spending on quality improvement initiatives.
Creator: Ferreira, Labiche, Hosni, Yasser A., Engineering
Abstract / Description: University of Central Florida College of Engineering Thesis; The quality movement has become popular among corporations big and small for one reason: empirical evidence suggests that quality and productivity (and hence profitability) are linked. Unfortunately, while many firms accept that quality and productivity go together, few actually track the gains associated with their quality improvement programs. Companies also tend to spend on quality improvement with no indication of estimation of...
Show moreUniversity of Central Florida College of Engineering Thesis; The quality movement has become popular among corporations big and small for one reason: empirical evidence suggests that quality and productivity (and hence profitability) are linked. Unfortunately, while many firms accept that quality and productivity go together, few actually track the gains associated with their quality improvement programs. Companies also tend to spend on quality improvement with no indication of estimation of the impact of funding on the targeted process. It would be of great value to know: (1) the impact of spending to enhance the product/process quality level, and (2) the point at which expenditures for quality improvement are not economical. This research involves modeling the quality level of a product composed of integrated components/processes and the costs associated with quality improvement. Presented in this research is a methodology for determining the point at which the target quality level is reached. This point signifies when future spending should be re-directed. The research defines this point as the "Crash Quality Point (CQP)." Cases of a single process level and double level three-stage process are modeled to conceptualize CQP. The finding from the output analysis reveal that the quality level approaches the target level at varying points in time. Any spending beyond this point does not have an impact on the quality level compared to the period prior to the Crash Quality Point. Spending past this point is futile and these funds could be spent on the quality improvement projects. The special case modeled also illustrates the use of this tool in the selection of processes for improvements based on the quality level of the process. This is an added advantage in scenarios where funds are limited and management is constrained to improve process quality with limited funds. Using a real world example validates the proposed CQP methodology. The results of the validation indicate that the model developed can assist managers in forecasting the budget requirements for quality spending based on the quality improvement goals. The tool also enables managers to estimate the point in time at which allocations of funds may be directed for process reengineering. The CQP method will enable quality improvement professionals to determine the economical viability and the limits in expenditures on quality improvement. It enables managers to evaluate spending alternatives and approximate when the point of diminishing return is reached.
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Date Issued: 2000
Identifier: CFR0011594, ucf:53046
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFR0011594

Title: Understanding and Mitigating Sources of Teacher Dissatisfaction.
Creator: Howard, Carl, Boote, David, Hopp, Carolyn, Vitale, Thomas, Hayes, Grant, University of Central Florida
Abstract / Description: This dissertation in practice focuses on a review of literature to answer the guiding question, what can teachers and other educational stakeholders do to help address their sources of dissatisfaction in order to build a positive school climate? The author used a modified frame analysis from Bolman and Deal, other published literature, and personal experience to identify seven different, but sometimes related, domains that affect teachers and school climate. These seven domains include...
Show moreThis dissertation in practice focuses on a review of literature to answer the guiding question, what can teachers and other educational stakeholders do to help address their sources of dissatisfaction in order to build a positive school climate? The author used a modified frame analysis from Bolman and Deal, other published literature, and personal experience to identify seven different, but sometimes related, domains that affect teachers and school climate. These seven domains include operations/management, contract application, professional development, classroom management, interpersonal, financial, and unanticipated events. The modified frame analysis was used to help empower teachers to solve problems that affect their performance and motivation, to prevent burnout, attrition, as well as help build and maintain a positive school climate. This dissertation promotes the notion that school climate is composed of and constructed from these seven domains as constituent parts that combine to create the school climate. The author-created tool, Tools for Teachers to Address Domains of Dissatisfaction, enables teachers to quickly reference potential solutions to problems faced. The tool is a prototype, created based on professional literature sources focusing on research-based strategies to identify problems and methods a teacher can use to solve a problem, thus preventing a negative school environment for the students, staff as well as other stakeholders. The domains of dissatisfaction were tested against real-life issues submitted to a Faculty Advisory Committee in order to provide veracity and justification of the domains.
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Date Issued: 2015
Identifier: CFE0005956, ucf:50796
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0005956

Title: On the security of NoSQL cloud database services.
Creator: Ahmadian, Mohammad, Marinescu, Dan, Wocjan, Pawel, Heinrich, Mark, Brennan, Joseph, University of Central Florida
Abstract / Description: Processing a vast volume of data generated by web, mobile and Internet-enabled devices, necessitates a scalable and flexible data management system. Database-as-a-Service (DBaaS) is a new cloud computing paradigm, promising a cost-effective and scalable, fully-managed database functionality meeting the requirements of online data processing. Although DBaaS offers many benefits it also introduces new threats and vulnerabilities. While many traditional data processing threats remain, DBaaS...
Show moreProcessing a vast volume of data generated by web, mobile and Internet-enabled devices, necessitates a scalable and flexible data management system. Database-as-a-Service (DBaaS) is a new cloud computing paradigm, promising a cost-effective and scalable, fully-managed database functionality meeting the requirements of online data processing. Although DBaaS offers many benefits it also introduces new threats and vulnerabilities. While many traditional data processing threats remain, DBaaS introduces new challenges such as confidentiality violation and information leakage in the presence of privileged malicious insiders and adds new dimension to the data security. We address the problem of building a secure DBaaS for a public cloud infrastructure where, the Cloud Service Provider (CSP) is not completely trusted by the data owner. We present a high level description of several architectures combining modern cryptographic primitives for achieving this goal. A novel searchable security scheme is proposed to leverage secure query processing in presence of a malicious cloud insider without disclosing sensitive information. A holistic database security scheme comprised of data confidentiality and information leakage prevention is proposed in this dissertation. The main contributions of our work are:(i) A searchable security scheme for non-relational databases of the cloud DBaaS; (ii) Leakage minimization in the untrusted cloud.The analysis of experiments that employ a set of established cryptographic techniques to protect databases and minimize information leakage, proves that the performance of the proposed solution is bounded by communication cost rather than by the cryptographic computational effort.
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Date Issued: 2017
Identifier: CFE0006848, ucf:51777
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006848

Title: Streamlining the Acquisition Process: Systems Analysis for Improving Army Acquisition Corps Officer Management.
Creator: Chu-Quinn, Shawn, Kincaid, John, Wiegand, Rudolf, Mohammad, Syed, University of Central Florida
Abstract / Description: The Army Acquisition Officer lacks proficient experience needed to fill key leadership positions within the Acquisition Corps. The active duty Army officer is considered for the Acquisition Corps functional area between their 5th and 9th years of service as an officer (-) after completing initial career milestones. The new Acquisition Corps officer is the rank of senior Captain or Major when he arrives to his first acquisition assignment with a proficiency level of novice (in acquisition)....
Show moreThe Army Acquisition Officer lacks proficient experience needed to fill key leadership positions within the Acquisition Corps. The active duty Army officer is considered for the Acquisition Corps functional area between their 5th and 9th years of service as an officer (-) after completing initial career milestones. The new Acquisition Corps officer is the rank of senior Captain or Major when he arrives to his first acquisition assignment with a proficiency level of novice (in acquisition). The Army officer may be advanced in his primary career branch, but his level decreases when he is assigned into the Acquisition Corps functional area. The civilian grade equivalent to the officer is a GS-12 or GS-13 whose proficiency level is advanced in his career field. The purpose of this study is to use a systems analysis approach to decompose the current acquisition officer professional development system, in order to study how well the current active duty officer flow works and how well it interacts or influences an acquisition officer's professional development; and to propose a potential solution to assist in the management of Army acquisition officers, so they gain proficiency through not only education and training, but also the hands-on experience that is needed to fill key leadership positions in the Army Acquisition Corps. An increased proficiency and proven successful track record in the acquisition workforce is the basis to positively affect acquisition streamlining processes within the Department of Defense by making good decisions through quality experience.
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Date Issued: 2015
Identifier: CFE0005590, ucf:50254
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0005590

Title: A FRAMEWORK ROADMAP FOR IMPLEMENTING LEAN SIX SIGMA IN LOCAL GOVERNMENTAL ENTITIES.
Creator: Furterer, Sandra L., Elshennawy, Ahmad K., University of Central Florida
Abstract / Description: Lean Six Sigma is an approach focused on improving quality, reducing variation and eliminating waste in an organization. The concept of combining the principles and tools of Lean Enterprise and Six Sigma has occurred in the literature over the last several years. The majority of Lean Six Sigma applications have been in private industry, focusing mostly on manufacturing applications. The literature has not provided a framework for implementing Lean Six Sigma programs applied to local...
Show moreLean Six Sigma is an approach focused on improving quality, reducing variation and eliminating waste in an organization. The concept of combining the principles and tools of Lean Enterprise and Six Sigma has occurred in the literature over the last several years. The majority of Lean Six Sigma applications have been in private industry, focusing mostly on manufacturing applications. The literature has not provided a framework for implementing Lean Six Sigma programs applied to local government. This research provides a framework roadmap for implementing Lean Six Sigma in local government. The Service Improvement for Transaction-based Entities Lean Six Sigma Framework Roadmap (SITE MAP) identifies the activities, principles, tools, and important component factors to implement Lean Six Sigma. The framework provides a synergistic approach to integrating the concepts and tools of Lean Enterprise and Six Sigma using the DMAIC (Define-Measure-Analyze-Improve-Control) problem solving approach. A case study was used to validate the framework. Lean Six Sigma was successfully applied in a 7,000-citizen municipality to reduce the cycle time of the financial administrative processes in the Finance Department of the city government.
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Date Issued: 2004
Identifier: CFE0000021, ucf:46067
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000021

Title: OPTIMIZING THE GLOBAL PERFORMANCE OF BUILD-TO-ORDER SUPPLY CHAINS.
Creator: Shaalan, Tarek, Geiger, Christopher, University of Central Florida
Abstract / Description: Build-to-order supply chains (BOSCs) have recently received increasing attention due to the shifting focus of manufacturing companies from mass production to mass customization. This shift has generated a growing need for efficient methods to design BOSCs. This research proposes an approach for BOSC design that simultaneously considers multiple performance measures at three stages of a BOSC – Tier I suppliers, the focal manufacturing company and Tier I customers (product delivery...
Show moreBuild-to-order supply chains (BOSCs) have recently received increasing attention due to the shifting focus of manufacturing companies from mass production to mass customization. This shift has generated a growing need for efficient methods to design BOSCs. This research proposes an approach for BOSC design that simultaneously considers multiple performance measures at three stages of a BOSC – Tier I suppliers, the focal manufacturing company and Tier I customers (product delivery couriers). We present a heuristic solution approach that constructs the best BOSC configuration through the selection of suppliers, manufacturing resources at the focal company and delivery couriers. The resulting configuration is the one that yields the best global performance relative to five deterministic performance measures simultaneously, some of which are nonlinear. We compare the heuristic results to those from an exact method, and the results show that the proposed approach yields BOSC configurations with near-optimal performance. The absolute deviation in mean performance across all experiments is consistently less than 4%, with a variance less than 0.5%. We propose a second heuristic approach for the stochastic BOSC environment. Compared to the deterministic BOSC performance, experimental results show that optimizing BOSC performance according to stochastic local performance measures can yield a significantly different supply chain configuration. Local optimization means optimizing according to one performance measure independently of the other four. Using Monte Carlo simulation, we test the impact of local performance variability on the global performance of the BOSC. Experimental results show that, as variability of the local performance increases, the mean global performance decreases, while variation in the global performance increases at steeper levels.
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Date Issued: 2006
Identifier: CFE0001411, ucf:47063
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001411

Title: QUANTITATIVE ASSESSMENT OF SOFTWARE DEVELOPMENT PROJECT MANAGEMENT ISSUES USING PROCESS SIMULATION WITH SYSTEM DYNAMICS ELEMENTS.
Creator: Mizell, Carolyn, Malone, Linda, University of Central Florida
Abstract / Description: The complexity of software development projects makes estimation and management very difficult. There is a need for improved cost estimation methods and new models of lifecycle processes other than the common waterfall process. This work has developed a new simulation model of the spiral development lifecycle as well as an approach for using simulation for cost and schedule estimation. The goal is to provide a tool that can analyze the effects of a spiral development process as well as a tool...
Show moreThe complexity of software development projects makes estimation and management very difficult. There is a need for improved cost estimation methods and new models of lifecycle processes other than the common waterfall process. This work has developed a new simulation model of the spiral development lifecycle as well as an approach for using simulation for cost and schedule estimation. The goal is to provide a tool that can analyze the effects of a spiral development process as well as a tool that illustrates the difficulties management faces in forecasting budgets at the beginning of a project which may encourage more realistic approaches to budgetary planning. A new discrete event process model of the incremental spiral development lifecycle approach was developed in order to analyze the effects this development approach has on the estimation process as well as cost and schedule for a project. The input data for the key variables of size, productivity, and defect injection rates in the model was based on analysis of Software Engineering Laboratory data and provided for analysis of the effects of uncertainty in early project estimates. The benefits of combining a separate system dynamics model with a discrete event process models was demonstrated as was the effects of turnover on the cost and schedule for a project. This work includes a major case study of a cancelled NASA software development project that experienced cost and schedule problems throughout its history. Analysis was performed using stochastic simulation with derived probability distributions for key software development factors. A system dynamics model of human resource issues was also combined with the process model to more thoroughly analyze the effects of turnover on a project. This research has demonstrated the benefits of using a simulation model when estimating to allow for more realistic budget and schedule determination including an interval estimate to help focus on the uncertainty of early estimates.
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Date Issued: 2006
Identifier: CFE0001209, ucf:46939
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001209

Title: POLICE ORGANIZATIONAL PERFORMANCE IN THE STATE OF FLORIDA:CONFIRMATORY ANALYSIS OF THE RELATIONSHIP OF THE ENVIRONMENT AND DESIGN STRUCTURE TO PERFORMANCE.
Creator: Goltz, Jeffrey, Wan, Thomas, University of Central Florida
Abstract / Description: To date, police organizations have not been rigorously analyzed by organizational scholars and most analysis of these organizations has been captured through a single construct. The purpose of this study is to develop confirmatory police organizational analysis by validating a multi-dimensional conceptual framework that explains the relationships among three constructs: environmental constraints, the design structures of police organizations, and organizational performance indicators. The...
Show moreTo date, police organizations have not been rigorously analyzed by organizational scholars and most analysis of these organizations has been captured through a single construct. The purpose of this study is to develop confirmatory police organizational analysis by validating a multi-dimensional conceptual framework that explains the relationships among three constructs: environmental constraints, the design structures of police organizations, and organizational performance indicators. The modeling is deeply rooted in contingency theory, and the influence of isomorphism and institutional theory on the covariance structure model are investigated. One hundred and thirteen local police organizations from the State of Florida are included in this non-experimental, cross-sectional study to determine the direct effect of the environmental constraints on the performance of police organizations, the indirect effect of environmental constraints on the performance of police organizations via the organizational design structure of police organizations, and the direct affect of organizational design structure on performance of police organizations. For the first time, structural equation modeling and data envelopment analysis are used together to confirm the effects of the environment on police organization structure and performance. The results indicate that environmental social economic disparity indicators have a large positive effect on police resources and a medium effect on police efficiency. Propensity of crime indicators has a large negative effect on police resources, and population density has a small to medium negative effect on crime clearance. Structure has a much smaller effect on performance than the environment. The results of the efficiency analysis revealed unexpected findings. Three of the top five largest police organizations in the study scored maximum efficiency. The cause of this unexpected result is explained and confirmed in the covariance model. The study methodology and results enhances the understanding of the relationship among the constructs while subjecting environmental and police organizational data to two comprehensive analytical techniques. The policy implications and practical contributions of the study provide new knowledge and information to organizational management of police organizations. Furthermore, the study establishes a new approach to police organizational analysis and police services management research called Police Services Management Research (PSMR) that encompasses a variety of disciplines with a primary responsibility of theory building and the selection of theoretical framework.
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Date Issued: 2006
Identifier: CFE0001363, ucf:47000
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001363

Title: IMPROVING PROJECT MANAGEMENT WITH SIMULATION AND COMPLETION DISTRIBUTION FUNCTIONS.
Creator: Cates, Grant, Mollaghasemi, Mansooreh, University of Central Florida
Abstract / Description: Despite the critical importance of project completion timeliness, management practices in place today remain inadequate for addressing the persistent problem of project completion tardiness. Uncertainty has been identified as a contributing factor in late projects. This uncertainty resides in activity duration estimates, unplanned upsetting events, and the potential unavailability of critical resources. This research developed a comprehensive simulation based methodology for conducting...
Show moreDespite the critical importance of project completion timeliness, management practices in place today remain inadequate for addressing the persistent problem of project completion tardiness. Uncertainty has been identified as a contributing factor in late projects. This uncertainty resides in activity duration estimates, unplanned upsetting events, and the potential unavailability of critical resources. This research developed a comprehensive simulation based methodology for conducting quantitative project completion-time risk assessments. The methodology enables project stakeholders to visualize uncertainty or risk, i.e. the likelihood of their project completing late and the magnitude of the lateness, by providing them with a completion time distribution function of their projects. Discrete event simulation is used to determine a project's completion distribution function. The project simulation is populated with both deterministic and stochastic elements. Deterministic inputs include planned activities and resource requirements. Stochastic inputs include activity duration growth distributions, probabilities for unplanned upsetting events, and other dynamic constraints upon project activities. Stochastic inputs are based upon past data from similar projects. The time for an entity to complete the simulation network, subject to both the deterministic and stochastic factors, represents the time to complete the project. Multiple replications of the simulation are run to create the completion distribution function. The methodology was demonstrated to be effective for the on-going project to assemble the International Space Station. Approximately $500 million per month is being spent on this project, which is scheduled to complete by 2010. Project stakeholders participated in determining and managing completion distribution functions. The first result was improved project completion risk awareness. Secondly, mitigation options were analyzed to improve project completion performance and reduce total project cost.
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Date Issued: 2004
Identifier: CFE0000209, ucf:46243
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000209

Title: AN EVALUATION OF ENROLLMENT MANAGEMENT MODELS OF THE 28 FLORIDA COMMUNITY COLLEGES.
Creator: LoBasso, Thomas, Bozeman, William, University of Central Florida
Abstract / Description: ABSTRACT The purpose of this study was to determine the extent to which enrollment management models have been successfully implemented within the 28 Florida community colleges. The study also sought to determine when enrollment management structures began and whether expected benefits were achieved. Analysis of the data collected in this study indicated the following five major findings. First, enrollment management concepts and practices have been implemented at some level within the 23...
Show moreABSTRACT The purpose of this study was to determine the extent to which enrollment management models have been successfully implemented within the 28 Florida community colleges. The study also sought to determine when enrollment management structures began and whether expected benefits were achieved. Analysis of the data collected in this study indicated the following five major findings. First, enrollment management concepts and practices have been implemented at some level within the 23 Florida community colleges surveyed. This was evident by the use of the word "enrollment" in the organizational titles as well as in the titles of the individuals who were responsible for the models. Second, enrollment management models reported were determined to be relatively new in comparison to four-year institutions. The literature on enrollment management demonstrated that four-year colleges began enrollment management practices in the early-to-mid 1970s. Much of the existing literature on enrollment management has been based on the experiences at four-year institutions. Third, some enrollment management divisions appeared to have key enrollment offices displaced. The key enrollment offices selected in this study were supported throughout the literature. Those offices represented were as follows: Admissions, Records and Registration, Financial aid, Orientation, and Advising. Fourth, increasing enrollment was the strongest reason for implementing the enrollment structure and subsequently was the strongest benefit realized. The anticipated decline in high school graduates, and the expectation of subsequent declining college enrollments during the 1970s, provided the impetus for the adoption of models of enrollment management. The fifth finding was that moving key enrollment offices such as financial aid into the enrollment management organizations would be an improvement to existing models. As enrollment management concepts are implemented into practice, the realignment of related offices may be necessary to effectively accomplish goals.
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Date Issued: 2005
Identifier: CFE0000371, ucf:46330
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000371

Title: ORGANIZATIONAL LEGITIMACY AND THE STRATEGIC USE OF ACCOUNTING INFORMATION: THREE STUDIES RELATED TO SOCIAL AND ENVIRONMENTAL DISCLOSURE.
Creator: Cho, Charles, Roberts, Robin, University of Central Florida
Abstract / Description: This dissertation consists of three separate, but inter-related, studies overarching a common theme labeled "the role played by social and environmental accounting disclosures using different methodologies and framed within legitimacy theory." The first study investigates the use of different language techniques in social and environmental disclosures (SED) and tests whether the impression management hypothesis holds when disclosures are measured as such. The second study extends the ...
Show moreThis dissertation consists of three separate, but inter-related, studies overarching a common theme labeled "the role played by social and environmental accounting disclosures using different methodologies and framed within legitimacy theory." The first study investigates the use of different language techniques in social and environmental disclosures (SED) and tests whether the impression management hypothesis holds when disclosures are measured as such. The second study extends the "legitimacy on the Internet" arguments of Patten and Crampton (2004) by examining the content and presentation of corporate website environmental disclosure in relation to firm environmental performance of four size-matched sample groups constructed based on industry environmental sensitivity and America's Toxic 100 membership (the top 100 polluters in the US). The third study investigates whether and how Total, one of the world's largest integrated oil and gas companies headquartered in France, utilized legitimation strategies such as social and environmental disclosures, to respond to two significant environmental incidents. Taken together, these three studies build upon prior theoretical and empirical work to substantiate and advance social and environmental accounting research using various methodological lenses and perspectives.
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Date Issued: 2007
Identifier: CFE0001555, ucf:47155
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001555

Title: THE APPLICATION OF "CRASHING" A PROJECT NETWORK TO SOLVE THE TIME/COST TRADEOFF IN RECAPITALIZATION OF THE UH-60A HELICOPTER.
Creator: Fortier, Gregory, Reilly, Charles, University of Central Florida
Abstract / Description: Since the beginning of project management, people have been asked to perform "more with less" in expeditious time while attempting to balance the inevitable challenge of the time/cost tradeoff. This is especially true within the Department of Defense today in prosecuting the Global War on Terrorism both in Afghanistan and Iraq. An unprecedented and consistent level of Operational Tempo has generated heavy demands on current equipment and has subsequently forced the need to recapitalize...
Show moreSince the beginning of project management, people have been asked to perform "more with less" in expeditious time while attempting to balance the inevitable challenge of the time/cost tradeoff. This is especially true within the Department of Defense today in prosecuting the Global War on Terrorism both in Afghanistan and Iraq. An unprecedented and consistent level of Operational Tempo has generated heavy demands on current equipment and has subsequently forced the need to recapitalize several legacy systems until suitable replacements can be implemented. This paper targets the UH-60A:A Recapitalization Program based at the Corpus Christi Army Depot in Corpus Christi, Texas. More specifically, we examine one of the nine existing project sub-networks within the UH-60A:A program, the structural/electrical upgrade phase. In crashing (i.e. adding manpower or labor hours) the network, we determine the minimal cost required to reduce the total completion time of the 68 activities within the network before a target completion time. A linear programming model is formulated and then solved for alternative scenarios. The first scenario is prescribed by the program manager and consists of simply hiring additional contractors to augment the existing personnel. The second and third scenarios consist of examining the effects of overtime, both in an aggressive situation (with limited longevity) and a more moderate situation (displaying greater sustainability over time). The initial linear programming model (Scenario 1) is crashed using estimates given from the program scheduler. The overtime models are crashed using reduced-time crash estimates. For Scenarios 2 and 3, the crashable times themselves are reduced by 50% and 75%, respectively. Initial results indicate that a completion time of 79.5 days is possible without crashing any activities in the network. The five-year historical average completion time is 156 days for this network. We continue to crash the network in each of the three scenarios and determine that the absolute shortest feasible completion times, 73 days for Scenario 1, 76 days for Scenario 2, and 77.5 days for Scenario 3. We further examine the models to observe similarities and differences in which activities get targeted for crashing and how that reduction affects the critical path of the network. These results suggests an in-depth study of using linear programming and applying it to project networks to grant project managers more critical insight that may help them better achieve their respective objectives. This work may also be useful as the groundwork for further refinement and application for maintenance managers conducting day-to-day unit level maintenance operations.
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Date Issued: 2006
Identifier: CFE0001381, ucf:47008
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001381

Title: RESOURCE-CONSTRAINT AND SCALABLE DATA DISTRIBUTION MANAGEMENT FOR HIGH LEVEL ARCHITECTURE.
Creator: Gupta, Pankaj, Guha, Ratan, University of Central Florida
Abstract / Description: In this dissertation, we present an efficient algorithm, called P-Pruning algorithm, for data distribution management problem in High Level Architecture. High Level Architecture (HLA) presents a framework for modeling and simulation within the Department of Defense (DoD) and forms the basis of IEEE 1516 standard. The goal of this architecture is to interoperate multiple simulations and facilitate the reuse of simulation components. Data Distribution Management (DDM) is one of the six...
Show moreIn this dissertation, we present an efficient algorithm, called P-Pruning algorithm, for data distribution management problem in High Level Architecture. High Level Architecture (HLA) presents a framework for modeling and simulation within the Department of Defense (DoD) and forms the basis of IEEE 1516 standard. The goal of this architecture is to interoperate multiple simulations and facilitate the reuse of simulation components. Data Distribution Management (DDM) is one of the six components in HLA that is responsible for limiting and controlling the data exchanged in a simulation and reducing the processing requirements of federates. DDM is also an important problem in the parallel and distributed computing domain, especially in large-scale distributed modeling and simulation applications, where control on data exchange among the simulated entities is required. We present a performance-evaluation simulation study of the P-Pruning algorithm against three techniques: region-matching, fixed-grid, and dynamic-grid DDM algorithms. The P-Pruning algorithm is faster than region-matching, fixed-grid, and dynamic-grid DDM algorithms as it avoid the quadratic computation step involved in other algorithms. The simulation results show that the P-Pruning DDM algorithm uses memory at run-time more efficiently and requires less number of multicast groups as compared to the three algorithms. To increase the scalability of P-Pruning algorithm, we develop a resource-efficient enhancement for the P-Pruning algorithm. We also present a performance evaluation study of this resource-efficient algorithm in a memory-constraint environment. The Memory-Constraint P-Pruning algorithm deploys I/O efficient data-structures for optimized memory access at run-time. The simulation results show that the Memory-Constraint P-Pruning DDM algorithm is faster than the P-Pruning algorithm and utilizes memory at run-time more efficiently. It is suitable for high performance distributed simulation applications as it improves the scalability of the P-Pruning algorithm by several order in terms of number of federates. We analyze the computation complexity of the P-Pruning algorithm using average-case analysis. We have also extended the P-Pruning algorithm to three-dimensional routing space. In addition, we present the P-Pruning algorithm for dynamic conditions where the distribution of federated is changing at run-time. The dynamic P-Pruning algorithm investigates the changes among federates regions and rebuilds all the affected multicast groups. We have also integrated the P-Pruning algorithm with FDK, an implementation of the HLA architecture. The integration involves the design and implementation of the communicator module for mapping federate interest regions. We provide a modular overview of P-Pruning algorithm components and describe the functional flow for creating multicast groups during simulation. We investigate the deficiencies in DDM implementation under FDK and suggest an approach to overcome them using P-Pruning algorithm. We have enhanced FDK from its existing HLA 1.3 specification by using IEEE 1516 standard for DDM implementation. We provide the system setup instructions and communication routines for running the integrated on a network of machines. We also describe implementation details involved in integration of P-Pruning algorithm with FDK and provide results of our experiences.
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Date Issued: 2007
Identifier: CFE0001949, ucf:47447
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001949

Title: MULTIOBJECTIVE COORDINATION MODELS FOR MAINTENANCE AND SERVICE PARTS INVENTORY PLANNING AND CONTROL.
Creator: Martinez, Oscar, Geiger, Christopher, University of Central Florida
Abstract / Description: In many equipment-intensive organizations in the manufacturing, service and particularly the defense sectors, service parts inventories constitute a significant source of tactical and operational costs and consume a significant portion of capital investment. For instance, the Defense Logistics Agency manages about 4 million consumable service parts and provides about 93% of all consumable service parts used by the military services. These items required about US$1.9 billion over the fiscal...
Show moreIn many equipment-intensive organizations in the manufacturing, service and particularly the defense sectors, service parts inventories constitute a significant source of tactical and operational costs and consume a significant portion of capital investment. For instance, the Defense Logistics Agency manages about 4 million consumable service parts and provides about 93% of all consumable service parts used by the military services. These items required about US$1.9 billion over the fiscal years 1999-2002. During the same time, the US General Accountability Office discovered that, in the United States Navy, there were about 3.7 billion ship and submarine parts that were not needed. The Federal Aviation Administration says that 26 million aircraft parts are changed each year. In 2002, the holding cost of service parts for the aviation industry was estimated to be US$50 billion. The US Army Institute of Land Warfare reports that, at the beginning of the 2003 fiscal year, prior to Operation Iraqi Freedom the aviation service parts alone was in excess of US$1 billion. This situation makes the management of these items a very critical tactical and strategic issue that is worthy of further study. The key challenge is to maintain high equipment availability with low service cost (e.g., holding, warehousing, transportation, technicians, overhead, etc.). For instance, despite reporting US$10.5 billion in appropriations spent on purchasing service parts in 2000, the United States Air Force (USAF) continues to report shortages of service parts. The USAF estimates that, if the investment on service parts decreases to about US$5.3 billion, weapons systems availability would range from 73 to 100 percent. Thus, better management of service parts inventories should create opportunities for cost savings caused by the efficient management of these inventories. Unfortunately, service parts belong to a class of inventory that continually makes them difficult to manage. Moreover, it can be said that the general function of service parts inventories is to support maintenance actions; therefore, service parts inventory policies are highly related to the resident maintenance policies. However, the interrelationship between service parts inventory management and maintenance policies is often overlooked, both in practice and in the academic literature, when it comes to optimizing maintenance and service parts inventory policies. Hence, there exists a great divide between maintenance and service parts inventory theory and practice. This research investigation specifically considers the aspect of joint maintenance and service part inventory optimization. We decompose the joint maintenance and service part inventory optimization problem into the supplier's problem and the customer's problem. Long-run expected cost functions for each problem that include the most common maintenance cost parameters and service parts inventory cost parameters are presented. Computational experiments are conducted for a single-supplier two-echelon service parts supply chain configuration varying the number of customers in the network. Lateral transshipments (LTs) of service parts between customers are not allowed. For this configuration, we optimize the cost functions using a traditional, or decoupled, approach, where each supply chain entity optimizes its cost individually, and a joint approach, where the cost objectives of both the supplier and customers are optimized simultaneously. We show that the multiple objective optimization approach outperforms the traditional decoupled optimization approach by generating lower system-wide supply chain network costs. The model formulations are extended by relaxing the assumption of no LTs between customers in the supply chain network. Similar to those for the no LTs configuration, the results for the LTs configuration show that the multiobjective optimization outperforms the decoupled optimization in terms of system-wide cost. Hence, it is economically beneficial to jointly consider all parties within the supply network. Further, we compare the model configurations – LTs versus no LTs, and we show that using LTs improves the overall savings of the system. It is observed that the improvement is mostly derived from reduced shortage costs since the equipment downtime is reduced due to the proximity of the supply. The models and results of this research have significant practical implications as they can be used to assist decision-makers to determine when and where to pre-position parts inventories to maximize equipment availability. Furthermore, these models can assist in the preparation of the terms of long-term service agreements and maintenance contracts between original equipment manufacturers and their customers (i.e., equipment owners and/or operators), including determining the equitable allocation of all system-wide cost savings under the agreement.
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Date Issued: 2008
Identifier: CFE0002459, ucf:47723
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002459

Title: ASSESSMENT FRAMEWORK FOR THE EVALUATION AND PRIORITIZATION OF UNIVERSITY TECHNOLOGIES FOR LICENSING AND COMMERCIALIZATION.
Creator: Rahal, Ahmad, Rabelo, Luis, University of Central Florida
Abstract / Description: US corporations have long recognized university related scientific research as an important source of long term economic growth and technological innovation. This dynamic involvement with industry has drastically increased the university technology transfer and licensing activities, and has stretched the human and financial resources of Technology Management and Licensing Offices of many US universities. This research provides a mechanism that can aid in the complex process of properly...
Show moreUS corporations have long recognized university related scientific research as an important source of long term economic growth and technological innovation. This dynamic involvement with industry has drastically increased the university technology transfer and licensing activities, and has stretched the human and financial resources of Technology Management and Licensing Offices of many US universities. This research provides a mechanism that can aid in the complex process of properly assessing university-owned technologies and intellectual properties, to identify those with licensing and commercialization potential for the pursuit of truly important breakthrough discoveries. This research focuses on the university technology licensing and commercialization process from the perspectives of those licensing professionals whose firms' activities are engaged in licensing-in university technologies. The objectives of this research are to: 1.Identify the decision factors and licensing determinants that influence or impact the licensing and commercialization of university technologies. 2.Build and conduct a survey among those licensing professionals involved in the technology licensing process to determine the relative importance of each of the licensing determinants identified in the literature review, and their most current and up to date selection criteria for technologies they license. 3.Develop a framework to assist the University Technology Management & Transfer Office's personnel and other stakeholders in the assessment of the potential viability of the university technologies for licensing and commercialization.
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Date Issued: 2005
Identifier: CFE0000659, ucf:46505
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000659

Title: A SURVEY OF PROGRESSIVE AND AFFIRMATIVE EMPLOYEE DISCIPLINE SYSTEMS IN FLORIDA'S HOSPITALS.
Creator: Johnson, Mark, Fottler, Myron, University of Central Florida
Abstract / Description: Conflict between managers and employees is inevitable in any organization, whether public or private. Often, the source of the conflict is employee non-compliance. Managers are responsible for disciplining those employees whose performance or conduct is sub-standard or inappropriate. Therefore, the ability to effectively address employee non-compliance is an essential skill for all managers. Most employee discipline systems fall into one of three categories: traditional, progressive, and...
Show moreConflict between managers and employees is inevitable in any organization, whether public or private. Often, the source of the conflict is employee non-compliance. Managers are responsible for disciplining those employees whose performance or conduct is sub-standard or inappropriate. Therefore, the ability to effectively address employee non-compliance is an essential skill for all managers. Most employee discipline systems fall into one of three categories: traditional, progressive, and affirmative. Traditional systems were prevalent in the late-nineteenth and early twentieth centuries. An autocratic, demanding manager would mete out punishment to non-compliant employees both as an action against the employee and as a warning to other employees. Employees were often terminated for their first offense. With the advent of labor unionism and fair labor practices in the first half of the twentieth century, organizational leaders were required to develop more progressive employee discipline systems which protected employee "due process" and which allowed time and opportunity for improvement by the non-compliant employee. Progressive employee discipline systems are the most prevalent discipline systems in America's workforce today. These systems entail three or four steps, with each successive step usually resulting in more severe penalties for the same offense or more severe offenses. Progressive employee discipline allows the employee an opportunity to respond to non-compliance issues and to try to improve it to the extent required to maintain their position. A new employee discipline system, affirmative discipline, has gained adherents in the private sector primarily. Affirmative employee discipline systems do not use punishment to correct employee non-compliance but instead, ask managers to "coach" and "counsel" the non-compliant employee to better behavior and performance. Rehabilitating the employee's non-compliance is the primary goal of affirmative systems. The emphasis is not only upon the non-compliant employee, but on rehabilitating the "marriage" of non-compliant employee and direct supervisor. Little evidence exists to determine the extent to which progressive and affirmative employee discipline systems are being utilized in the modern organization. No evidence exists that indicates the prevalence of these systems in Florida's healthcare institutions. A survey-based analysis of the use of progressive and affirmative employee discipline systems in Florida's hospitals resulted in respondents indicating frequent utilization of formal progressive employee discipline systems. Designed in three or four steps, these progressive systems allow the employee to improve his/her behavior. Two common tools in progressive systems, the verbal warning and the performance counseling statement, are utilized frequently based upon those respondents surveyed. The use of affirmative employee discipline systems, on the other hand, is relatively rare. The use of written behavior contracts to elicit improved employee compliance is also quite rare. The vast majority of respondents appear to be unfamiliar with the use of written behavior contracts to elicit improved employee compliance.
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Date Issued: 2005
Identifier: CFE0000738, ucf:46580
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000738

Title: FACTORS THAT INFLUENCE IMPLEMENTATION OF PAIN MANAGEMENT STRATEGIES IN THE NEONATAL INTENSIVE CARE UNIT.
Creator: Martinez, Geraldine, Allred, Kelly, University of Central Florida
Abstract / Description: In the United States, 10% to 15% of newborns are admitted to the neonatal intensive care unit (NICU). Painful procedures are unavoidable during NICU care; the neonate experiences approximately 12 painful procedures per day. Inconsistent and/or inappropriate pain management in the NICU remains a problem. The purpose of this study is to identify the prevalent factors that influence the implementation of pain management strategies among nurses who work in a NICU setting in a Central Florida...
Show moreIn the United States, 10% to 15% of newborns are admitted to the neonatal intensive care unit (NICU). Painful procedures are unavoidable during NICU care; the neonate experiences approximately 12 painful procedures per day. Inconsistent and/or inappropriate pain management in the NICU remains a problem. The purpose of this study is to identify the prevalent factors that influence the implementation of pain management strategies among nurses who work in a NICU setting in a Central Florida hospital. This study was conducted using a voluntary and anonymous electronic survey. The survey was divided into two sections; the first section designed to describe the sample, and the second section containing a Likert-type scale that assessed the nurses' general pain knowledge, knowledge of pain assessment, and awareness of accepted pain management strategies. The survey was adapted from previously published research. Results indicate pain was more likely to be addressed when nurses collaborated closely with the attending physician. The majority of nurses were aware of current protocols for pain management on the unit but not all nurses agreed those protocols were adequate. Results also indicated pain assessment education is being provided in the NICU and the nurses feel confident in their skills to assess pain, however, not all nurses agreed that pain is being well managed in their unit. There appears to be a gap between the nurse's knowledge/skill to assess pain and implementation of strategies to decrease pain. Although it is the nurse's responsibility to prevent and treat newborn pain in the NICU, not all nurses agreed that newborn pain is well managed in their unit and some believe pain to be an unavoidable experience in the NICU. Nurse-physician collaboration is key to evidence based newborn pain management.
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Date Issued: 2014
Identifier: CFH0004609, ucf:45271
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFH0004609

Title: EXPLORING TACIT KNOWLEDGE IN ORGANIZATIONS.
Creator: Plazas, Andrea, Salas , Eduardo, University of Central Florida
Abstract / Description: There has been a growing prevalent interest to explore the role of knowledge in organizations. Bhardwaj and Monin (2006) identified the knowledge of individuals' as a valuable source of competitive advantage. An organizations well-rounded institutional memory- the organizations collective experiences (Rothwell & Poduch, 2004), fosters competitive advantage. There is a prevailing need to scrutinize the role of tacit knowledge in organizations and how it's hard to articulate nature makes it...
Show moreThere has been a growing prevalent interest to explore the role of knowledge in organizations. Bhardwaj and Monin (2006) identified the knowledge of individuals' as a valuable source of competitive advantage. An organizations well-rounded institutional memory- the organizations collective experiences (Rothwell & Poduch, 2004), fosters competitive advantage. There is a prevailing need to scrutinize the role of tacit knowledge in organizations and how it's hard to articulate nature makes it difficult for organizations to acquire and preserve institutional memory value. The aim of this review is to illustrate that tacit knowledge contributes significantly to the institutional memory value, expansion and preservation. In an effort to simplify this relationship between tacit knowledge and institutional memory, a comprehensive literature search was performed. I first discuss the role of knowledge in organizations and use the literature on tacit knowledge as a guide to explain the importance of its elicitation for institutional memory expansion and preservation. I then propose: (1) the use of tacit knowledge elicitation as a mediator, and (2) recommend training and a learning organization environment as moderators, for the contribution to take place. Finally, I suggest that organizations: (a) Elicit tacit knowledge sharing at their human capital development training programs (b) develop and implement this trainings at managerial levels, and (c) a "know-why" method to elicit and capture tacit knowledge in a reference guide, to consequently add value to the institutional memory, I conclude with a discussion of implications and limitations for the proposed perspective, and provide suggestions for future research.
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Date Issued: 2013
Identifier: CFH0004492, ucf:45062
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFH0004492

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