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Articles 1 - 30 of 99
Full-Text Articles in Entire DC Network
Determination Of A Flexibility Range For Cellular Manufacturing Systems Under Product Mix Variations, Hamid Seifoddini, Manocher Djassemi
Determination Of A Flexibility Range For Cellular Manufacturing Systems Under Product Mix Variations, Hamid Seifoddini, Manocher Djassemi
Industrial Technology and Packaging
One of the underlying assumptions in cellular manufacturing is that product mix is relatively stable over time. In this paper, a procedure for the sensitivity analysis of the performance of a cellular manufacturing system with respect to changes in the product mix is presented and a flexibility range representing the capability of the system in dealing with these changes is determined using simulation modelling. The simulation results in this study show that as the changes in the product mix increase the superiority of the performance of the cellular manufacturing system to the corresponding job shop system diminishes.
Acuta Enews December 1997, Vol. 26, No. 12
Acuta Enews December 1997, Vol. 26, No. 12
ACUTA Newsletters
In This Issue
Sixth Annual Institutional Excellence Awards Competition
Slamming on the Rise
President's Column
Slamming
Board Report
A Great Seminar
Board Approves New Appointments
Meet Me at.... UM
Technology Timetable
On the Move
1998 ACUTA Events
Spotlight
DC at a Glance
Journal Editorial Calendar for 1998
Welcome New Members
Introduction Of Iowa System Of Curves To Reliability Engineers, Alamgir Alvi
Introduction Of Iowa System Of Curves To Reliability Engineers, Alamgir Alvi
Masters Theses
The reliability engineers have been using different techniques and a good number of theoretical models to analyze and predict the performance of the designed systems and products. While, most of the engineers working in the area of life analysis, have been using the empirical model named Iowa systems of curves to analyze and forecast the service life of industrial properties. Two different groups of experts have obviously been working toward almost the same objective but using different techniques and tools. The purpose of this study is to introduce to reliability engineers the Iowa systems of curves and compare this empirical …
An Analysis Of Early Software Reliability Improvement Techniques, John G. Leonard, Ric K. Nordgren
An Analysis Of Early Software Reliability Improvement Techniques, John G. Leonard, Ric K. Nordgren
Theses and Dissertations
This research explores early life cycle software reliability prediction models or techniques to predict the reliability of software prior to writing code, and a method for increasing or improving the reliability of software products early in the development life cycle. Five prediction models and two development techniques are examined. Each model is statically analyzed in terms of availability of data early in the life cycle, ease of data collection, and whether data is currently collected. One model and the two techniques satisfied those requirements and are further analyzed for their ability to predict or improve software reliability. While the researchers …
Development Of A System To Determine The Economically Optimal Combination Of Housing For An Air Force Installation, Johnathan E. Hendrix
Development Of A System To Determine The Economically Optimal Combination Of Housing For An Air Force Installation, Johnathan E. Hendrix
Theses and Dissertations
The United States Military is faced with the decision of how to house its military members and their families. The three options available to house these families are: 1) utilize existing on-base housing; 2) build new on-base housing; or, 3) compensate a military family monetarily to find housing off-base. This research focused on the development of a tool to all the decision maker in determining what combination of the three options is economically optimal for an individual Air Force Installation. The model developed incorporates the costs associated to the local area and conditions at the specific installation to determine the …
Combining Multi-Attribute Utility And Geographic Information For Boundary Decisions: An Application To Park Planning, Jeffrey Keisler, Ronald Sundell
Combining Multi-Attribute Utility And Geographic Information For Boundary Decisions: An Application To Park Planning, Jeffrey Keisler, Ronald Sundell
Jeffrey Keisler
Scheduling And Sequencing Arrivals To A Stochastic Service System, Peter M. Vanden Bosch
Scheduling And Sequencing Arrivals To A Stochastic Service System, Peter M. Vanden Bosch
Theses and Dissertations
Optimization of scheduled arrival times to an appointment system is approached from the perspectives of both queueing and scheduling theory. The appointment system is modeled as a one-server, first-come-first-served, transient queue with independent, distinctly distributed service times and no-show rates. If a customer does show, it is assumed to be punctual. The cost of operating the appointment system is a convex combination of customers' waiting times and the server's overtime. While techniques for finding the optimal static and dynamic schedules of arrivals have been proposed by other researchers, they mainly have focused on identical customers and strictly punctual arrivals. This …
Acuta Enews November 1997, Vol. 26, No. 11
Acuta Enews November 1997, Vol. 26, No. 11
ACUTA Newsletters
In This Issue
Second Annual ACUTA Student Paper Competition
SLCC Telecom Bails Out
Board Report
SLCC
President's Column
Negotiating a Wireless Contract
Seminar Looks at Networks, Legislative & Regulatory Issue
Is There a Back Door to Your Long Distance?
DC at a Glance
Welcome New Members
Rat Wire Schools
Spotlight
A Decision Support System For The Equipment Selection Of Robotic Manufacturing Cells, Lars Johan Resare
A Decision Support System For The Equipment Selection Of Robotic Manufacturing Cells, Lars Johan Resare
Theses
Considering the principles of concurrent engineering, a Decision Support System (DSS) is developed to aid in the equipment selection of robotic manufacturing cells. The objective is to synchronously and simultaneously select proper equipment for the cell to provide efficient performance, subject to operational and budgetary constraints.
The DSS consists of several modules, including a data base that houses the specifications of equipment available in the market place, a first cut selection module, and an optimization engine. In its development, the optimization scheme utilizes analytical models and algorithms that capture different sources of variability in production, such as tolerances, clearances and …
Acuta Enews October 1997, Vol. 26, No. 10
Acuta Enews October 1997, Vol. 26, No. 10
ACUTA Newsletters
In This Issue
Marketing Ethernet at Mizzou
Board Report
President's Message
Maximizing Call Center Potential
Welcome New Members
ACUTA Committees at Work
Spotlight
Mizzou
Marketing Committee Needs You!
Lisa Cheshire, CMP
Semer Chairs ASAE Technology Section
DC at a Glance
ACUTA Event Calendar
"Telco Network Whale"
Minimizing Post-Production Weight Growth In Tanks Using A Decision Analysis Model, Michael F. Cochrane
Minimizing Post-Production Weight Growth In Tanks Using A Decision Analysis Model, Michael F. Cochrane
Engineering Management & Systems Engineering Theses & Dissertations
Post-production weight growth of tanks is an historic problem for the military. Tanks are difficult to transport because of their weight, and post-production modifications tend to cause this weight to increase over the lifecycle of the tank. In this thesis, a computer model is constructed which uses influence diagrams to model tank weight growth as a probabilistic process. Historical weight data for the MI Abrams tank program is used to derive probabilities for the model. The model is used to predict tank weight growth over both the short and long term with the goal of understanding more about how and …
A Proposed Approach To Iso Compliance And Validation For Metrology Laboratories, J. Lyle Bagley
A Proposed Approach To Iso Compliance And Validation For Metrology Laboratories, J. Lyle Bagley
Engineering Management & Systems Engineering Theses & Dissertations
International competition among metrology laboratories, as well as their customers, has intensified the incentive to seek either accreditation to ISO Guide 25 or ISO 9000 quality system registration for the laboratory. The debate continues as to which is more beneficial to the laboratory and its customers once the decision is made to pursue one or the other. This study addresses the advantages and limitations of each, and how best to prepare for complying with ISO standards. The literature was reviewed and ISO certification experts were questioned about these issues. The results were combined with new applications of existing operations research …
Modeling And Comparison Of Wormhole Routed Mesh And Torus Networks, Ronald I. Greenberg, Lee Guan
Modeling And Comparison Of Wormhole Routed Mesh And Torus Networks, Ronald I. Greenberg, Lee Guan
Computer Science: Faculty Publications and Other Works
2D-mesh and torus networks have often been proposed as the interconnection pattern for parallel computers. In addition, wormhole routing has increasingly been advocated as a method of reducing latency. Most analysis of wormhole routed networks, however, has focused on the torus and the broader class of k-ary n-cubes to which it belongs. This paper presents a performance model for the wormhole routed mesh, and it compares the performance of the mesh and torus based on theoretical and empirical analyses.
Acuta Enews September 1997, Vol. 26, No. 9
Acuta Enews September 1997, Vol. 26, No. 9
ACUTA Newsletters
In This Issue
Telecom Goes Marketing
Board Report
President's Message
Marketing Telecom
Thanks to Sprint for Sponsoring Directory
User Groups Meet in Atlanta and Online
Resource Library Update
Last Call for Directory Updates!
On the Move....
Guide to Distance Learning Available
Internet Call Manager
Spotlight
DC at a Glance
Welcome New Members
ACUTA Event Calendar
Foreign Military Sales Supply Support: Is There A Better Way?, Eric G. Ellmyer, Won Joon Jang
Foreign Military Sales Supply Support: Is There A Better Way?, Eric G. Ellmyer, Won Joon Jang
Theses and Dissertations
In today's world of declining defense budgets, there is an increasing need for South Korea to ensure they obtain the best dollar value when procuring defense articles. With the increasing financial situation, the purpose of this thesis is to research a surrogate third party firm and determine to what degree South Korea and other foreign military sales customers obtain the best value for their money for follow-on support item procurements. South Korea has participated in the Parts and Repair Ordering System program since its inception. However, South Korea has received little, if any, feedback regarding lead time and cost performance …
A Comparison Of The Military's Organic Movement And Commercial Express Carriers, Travis E. Condon, Kirk A. Patterson
A Comparison Of The Military's Organic Movement And Commercial Express Carriers, Travis E. Condon, Kirk A. Patterson
Theses and Dissertations
The DoD has begun outsourcing airlift in order to expedite high priority cargo movement. However, are commercial express carriers more expedient in the cargo delivery than the Air Force organic transportation system? Although anecdotal evidence suggests commercial carriers are faster, little empirical research has been conducted on this subject. This study compares the military's organic transportation system with Federal Express in the delivery of high priority cargo to Spangdahlem Air Base, Germany. The Large Sample Test of Hypothesis was used to determine if there was a significant difference between the cargo transit times of the two. The mean delivery time …
Applying Cross-Decking And Activity-Based Costing To Military Distribution Centers: A Proposed Framework, Jonathan P. Elliott, Dwight H. Hintz Jr.
Applying Cross-Decking And Activity-Based Costing To Military Distribution Centers: A Proposed Framework, Jonathan P. Elliott, Dwight H. Hintz Jr.
Theses and Dissertations
Current events and fiscal constraints have focused DoD planners' attention on reducing logistics costs and improving efficiency while maintaining effective combat operations support. Military leaders are seeking private industry best practices that may help the DoD achieve these goals. Two commercially successful business practices that may help the DoD achieve its goals are cross-docking and Activity-Based Costing (ABC). Cross-docking is a commercially proven approach to material distribution through a distribution center that can help reduce inventories, speed material flows, and cut related logistics activity costs. However, the DoD is faced with the challenge of costing current and potential logistics processes …
The Effects Of Extraneous Presentation Graphics On Decision Making, Thomas S. Tingley
The Effects Of Extraneous Presentation Graphics On Decision Making, Thomas S. Tingley
Theses and Dissertations
Almost every professional presentation includes some form of graphics. Many previous researchers have analyzed the relative effectiveness of graphical decision aids, such as pie charts or bar graphs. Very little research, however, has been conducted to determine the effects of extraneous graphics, such as pictures and logos, on decision making. This study employed an experiment to determine whether extraneous graphics hinder or enhance a decision maker's ability to obtain the pertinent information from a professional presentation. Other factors such as gender and graphics training were also analyzed for any influence on the results obtained. The results of the study indicated …
A Parallel Genetic-Neuro Scheduler For Job-Shop Scheduling Problems, H. C. Lee, Cihan H. Dagli
A Parallel Genetic-Neuro Scheduler For Job-Shop Scheduling Problems, H. C. Lee, Cihan H. Dagli
Engineering Management and Systems Engineering Faculty Research & Creative Works
Despite relentless efforts on developing new approaches, there are still large gaps between schedules generated through various planning systems, and schedules actually used in the shop floor environment. An effective schedule generation is a knowledge intensive activity requiring a comprehensive model of a factory and its environment at all times. There are four main difficulties that need to be addressed. First, job shop scheduling belongs to a class of NP-hard problems. Second, it is a highly constrained problem that changes from shop to shop. Third, scheduling decisions depend upon other decisions which are not isolated from other functions. Thus, it …
Acuta Enews August 1997, Vol. 26, No. 8
Acuta Enews August 1997, Vol. 26, No. 8
ACUTA Newsletters
In This Issue
26th Annual Conference: Highlights from Atlanta
Board Report
President's Message
Rains Came Down, Floods Came Up
Faster Internet Access Over Existing Wiring
Spotlight
Directory Update
Welcome New Members
DC at a Glance
ACUTA Event Calendar
Instant Info
An Improved Analytical Model For Wormhole Routed Networks With Application To Butterfly Fat-Trees, Ronald I. Greenberg, Lee Guan
An Improved Analytical Model For Wormhole Routed Networks With Application To Butterfly Fat-Trees, Ronald I. Greenberg, Lee Guan
Computer Science: Faculty Publications and Other Works
A performance model for wormhole routed interconnection networks is presented and applied to the butterfly fat-tree network. Experimental results agree very closely over a wide range of load rate. Novel aspects of the model, leading to accurate and simple performance predictions, include (1) use of multiple-server queues, and (2) a general method of correcting queuing results based on Poisson arrivals to apply to wormhole routing. These ideas can also be applied to other networks.
Dynamic Stability Of Two Tractor Front-End Loader Systems, Michael J. Bader, Linus R. Walton, Larry G. Wells
Dynamic Stability Of Two Tractor Front-End Loader Systems, Michael J. Bader, Linus R. Walton, Larry G. Wells
Biosystems and Agricultural Engineering Faculty Publications
A one-quarter scale model tractor and loader were designed, fabricated, and used in an experiment to evaluate two tractor-loader configurations relative to stability using roll angle as the means of assessment. The nonconventional loader system consisted of a conventional loader attached to a steerable carrier which in turn was attached to the tractor by the front axle and drawbar of the tractor. The stabilizing axle for the non-conventional loader system was the front axle as opposed to the conventional system in which the stabilizing axle was the rear axle. The experiment showed that the non-conventional loader had an inherent advantage …
A Value Function Approach To Information Operations Moe's: A Preliminary Study, Michael P. Doyle, Richard F. Deckro, Jack M. Kloeber Jr., Jack A. Jackson Jr., Center For Modeling, Simulation, And Analysis, Air Force Institute Of Technology
A Value Function Approach To Information Operations Moe's: A Preliminary Study, Michael P. Doyle, Richard F. Deckro, Jack M. Kloeber Jr., Jack A. Jackson Jr., Center For Modeling, Simulation, And Analysis, Air Force Institute Of Technology
AFIT Documents
A value focused thinking approach is applied to information operations. A preliminary value hierarchy for information operations is constructed by extracting the values of senior military leadership from existing doctrine. To identify these key values for information operations, applicable existing doctrine was reviewed and summarized. Additionally, hierarchical representations of the values represented within each reviewed doctrine are developed. A value hierarchy requires that supporting objectives be mutually exclusive and collectively exhaustive. Within this analysis, these requirements are enforced, in part, by developed definitions which serve as tests to maintain mutual exclusivity. An exhaustive set of supporting values is also guaranteed …
Acuta Enews July 1997, Vol. 26, No. 7
Acuta Enews July 1997, Vol. 26, No. 7
ACUTA Newsletters
In This Issue
ACUTA Conference Webcast
Board of Directors 1997-98
Board Report
President's Message
Welcome New Members
Music on Hold: Too Soft... Too Loud
Voicemail: Technology We Love to Hate
Spotlight
Anniversaries to Be Recognized
DC at a Glance
Supreme Court Rules Against Communications Decency Act
A Synthesized Methodology For Eliciting Expert Judgment For Addressing Uncertainty In Decision Analysis, Richard W. Monroe
A Synthesized Methodology For Eliciting Expert Judgment For Addressing Uncertainty In Decision Analysis, Richard W. Monroe
Engineering Management & Systems Engineering Theses & Dissertations
This dissertation describes the development, refinement, and demonstration of an expert judgment elicitation methodology. The methodology has been developed by synthesizing the literature across several social science and scientific fields. The foremost consideration in the methodology development has been to incorporate elements that are based on reasonable expectations for the human capabilities of the user, the expert in this case.
Many methodologies exist for eliciting assessments for uncertain events. These are frequently elicited in probability form. This methodology differs by incorporating a qualitative element as a beginning step for the elicitation process. The qualitative assessment is a more reasonable way …
Integrating Core Industrial Engineering Courses Through A Manufacturing Case Study, Susan L. Murray
Integrating Core Industrial Engineering Courses Through A Manufacturing Case Study, Susan L. Murray
Engineering Management and Systems Engineering Faculty Research & Creative Works
This paper presents a summary of research conducted by a team of students from the University of Missouri-Rolla. The manufacturing processes at a local firm were evaluated. The case study illustrates the benefits of applying ergonomic, safety, work measurement, and quality assessment tools together. Additionally this team approach illustrates the importance of educating engineering students to think across course and discipline lines. The paper concludes with generalized recommendations for other educational applications.
Engineering Management And Industrial Engineering: Six One Way, A Half Dozen The Other, Susan L. Murray, Stephen A. Raper
Engineering Management And Industrial Engineering: Six One Way, A Half Dozen The Other, Susan L. Murray, Stephen A. Raper
Engineering Management and Systems Engineering Faculty Research & Creative Works
To some people engineering management (EM) is a specialty within Industrial Engineering (IE), to others EM is broader than IE. Comparing the histories of the two disciplines shows a clear distinction. Both disciplines have their roots in the work of engineering pioneers at the turn of the century. Work in motion and time study, along with other efficiency driven techniques, was the beginning of IE. Both IE and EM can trace their roots to the era of scientific management and the work of the early pioneers. A noted change for IE occurred after World War II when many programs shifted …
Development Of A Mechatronics Design Studio, Sema E. Alptekin
Development Of A Mechatronics Design Studio, Sema E. Alptekin
Industrial and Manufacturing Engineering
Mechatronics is a combination of mechanics, electronics and information technology intended to raise the intelligence level and flexibility of products and devices. There is a need to develop programs and laboratories in Mechatronics to create an understanding of how new technologies influence the traditional methods of designing products and manufacturing systems. A model "Mechatronics Design Studio" has recently been developed to support the Mechatronics and Manufacturing Automation courses offered at Cal Poly's Industrial and Manufacturing Engineering Department. Laboratory experiments have been developed and several student projects have been completed. In this paper, an overview of the design studio and select …
Design And Development Of A User Interface Between Mapics/Db And Factor 5.2, Raghu Pothuri
Design And Development Of A User Interface Between Mapics/Db And Factor 5.2, Raghu Pothuri
Masters Theses
An interface program was designed to transfer production data from MAPICS/DB, a MRP II software, to FACTOR 5.2, a Finite Capacity Scheduling software. Since FACTOR 5.2 is designed to be used in a stand-alone mode with its own independent data base, this interface program extracts data from the MRP II System and converts it to formats specified by the Scheduling System. To create a computer model of the manufacturing process, information about manufacturing orders, routings, and production facilities was obtained from MAPICS/DB files. Certain information needed by FACTOR 5.2, which is not available in MAPICS/DB, was supplemented by the program …
Acuta Enews June 1997, Vol. 26, No. 6
Acuta Enews June 1997, Vol. 26, No. 6
ACUTA Newsletters
In This Issue
University of North Dakota Weathers Flood
Board Report
Welcome Donna
Calling All Authors
Internet 2 Goals
Welcome New Members
Spotlight
DC at a Glance
Competition Comes to Canada Telecom
FCC Modifies Caller ID