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Theses/Dissertations

1995

Operations Research, Systems Engineering and Industrial Engineering

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Articles 1 - 27 of 27

Full-Text Articles in Engineering

Integrating Key Functions In Product Development : A Conceptual Product Development Model For The Korean Context, Jong-Wook Kim Dec 1995

Integrating Key Functions In Product Development : A Conceptual Product Development Model For The Korean Context, Jong-Wook Kim

Theses

The high-tech market is characterized by market uncertainty, technology uncertainty and rapid change. To survive in this risky high-tech market, a company must create competitively effective product development practices that meet its own unique needs and circumstances.

One effective practice is cross-functional integration in the product development process. The advantages of integration include a shortened time to market, successful transformation of research results to production, productivity improvement, innovation project success, and high-quality problem solutions. However, these advantages are rarely obtained in the current product development practices of Korean companies. Their product development efforts are generally characterized by time consuming sequential ...


Cumulative Average Pricing Method For Estimating Average Service Life, Mahendra Babu Hosangadi Dec 1995

Cumulative Average Pricing Method For Estimating Average Service Life, Mahendra Babu Hosangadi

Master's Theses

The study determined if accuracy of estimation of retirement price of industrial equipment was affected by using a cumulative average pricing (CAP) method at varying conditions of inflation rate, service life, and life characteristics. The study also determined the accuracy of estimating the average life of unaged data by simulated plant record (SPR) method. Thirty-six experiments were conducted at varying conditions of inflation rate, curve type and average life. The study was conducted for two left modal curves, two symmetrical modal curves and two right modal curves at 20 and 40 years average life using three different inflation rates: 3 ...


Addition Of Automatic Dimensioning Feature To D-M-E’S Ultimate Mold Base Design Software, Cori L. Brown Aug 1995

Addition Of Automatic Dimensioning Feature To D-M-E’S Ultimate Mold Base Design Software, Cori L. Brown

Master's Theses

There have been many improvements in the plastics industry over the past few years. One of these areas is in the design of injection molds. This area has been enhanced by the use of Computer-Aided Design systems and furthered by the creation of specialized mold design software. The Ultimate® design system from D-M-E has made a mold designer's job much easier by automating much of this process. This project extends the function of this software by adding an automatic dimensioning feature that will make the mold design process less tedious and less time consuming. This addition will also standardize ...


Development Of A Mold Trial Procedure For Establishing A Robust Process, Marc R. Vander Kooi Aug 1995

Development Of A Mold Trial Procedure For Establishing A Robust Process, Marc R. Vander Kooi

Master's Theses

To reduce variation in the injection molding process it is essential to understand the effect of process, mold, and material variables on critical part characteristics. Gaining a thorough understanding of these variables is often difficult due to the limited time manufacturers typically have available for mold trials. To address this issue, the Premier Class Injection Molding consortium (PCIM) has performed numerous experiments relating to shot-to-shot repeatability. Using the PCIM data set and experimentation procedures as a base, a procedure was developed to collect data during a mold trial. Incorporating small experiments and statistical analysis, the new procedure allows meaningful data ...


Analysis Of A Design For Its Quality Manufacturability In Terms Of Misalignments And Fastener Related Problems, Abhinav Dhar May 1995

Analysis Of A Design For Its Quality Manufacturability In Terms Of Misalignments And Fastener Related Problems, Abhinav Dhar

Theses

This study analyzes the relationship between design parameters established at the initial stage of the design process and the manufacturing quality problems that manifest themselves during production. Specifically, we study the relationship between design features and the occurrence of misalignment defects and fastener related problems.

This outcome of this work is a methodology, Design for Quality Manufacturability (DFQM). DFQM addresses the likelihood that defects will occur during the manufacture of a product in a standard plant. This is based on the premise that defects in assembled products are often influenced by some features of the design and/or assembly process ...


Knowledge Acquisition And Structuring By Multiple Experts In A Group Support Systems Environment, Bernard Lee Lewis Apr 1995

Knowledge Acquisition And Structuring By Multiple Experts In A Group Support Systems Environment, Bernard Lee Lewis

Engineering Management & Systems Engineering Theses & Dissertations

This study addresses the impact of Group Decision Support Systems (GDSS) on expert system development by multiple Domain Experts. Current approaches to building expert systems rely heavily on knowledge acquisition and prototyping by a Knowledge Engineer working directly with the Domain Expert. Although the complexity of knowledge domains and new organizational approaches demand the involvement of multiple experts, standard procedures limit the ability of the Knowledge Engineer to work with more than one expert at a time.

Group Decision Support Systems offer a networked computerized environment for group work activities, in which multiple experts may express their ideas concurrently and ...


Adaptive Nonlinear Attitude Control Of Spacecraft , Cheng Tang Jan 1995

Adaptive Nonlinear Attitude Control Of Spacecraft , Cheng Tang

Retrospective Theses and Dissertations

Three adaptive nonlinear control approaches are proposed for attitude control of a Space Station. These control algorithms avoid the need for linearization, either by truncating a Taylor series or by a feedback linearization approach, which poses some difficulties in the presence of both uncertain mass properties and external disturbances. Global stability of the Space Station is guaranteed;A conventional linear-quadratic regulator synthesis technique is investigated. This linear control scheme provides a natural way to select control gains for the known spacecraft system parameters. Simulation results reveal that the uncertain mass property causes the nonlinear Space Station to be uncontrollable;On ...


Design Of Developmental Test Programs For One-Shot Systems With Two State Reliability , Mu-Yeh Huang Jan 1995

Design Of Developmental Test Programs For One-Shot Systems With Two State Reliability , Mu-Yeh Huang

Retrospective Theses and Dissertations

This dissertation considers efficient developmental testing for one-shot systems (for example, missiles) that are destroyed in testing or first normal use, where there is the possibility of "reliability growth" of the basic system design as a result of redesigns following failed developmental tests. We consider situations where the cost of redesign is negligible and there is a fixed procurement budget covering both system development and purchase, each developmental test produces either a binary (success-failure) or a continuous outcome. The analysis offered here is intended as an answer to the question "How much testing is enough?" posed by Seglie (1992) in ...


Analysis Of Nonlinear Modal Interaction And Its Effect On Control Performance In Stressed Power Systems Using Normal Forms Method , Chih-Ming Lin Jan 1995

Analysis Of Nonlinear Modal Interaction And Its Effect On Control Performance In Stressed Power Systems Using Normal Forms Method , Chih-Ming Lin

Retrospective Theses and Dissertations

In this research the nonlinear modal interaction and the effect of the interaction on the stressed power system dynamic behavior including excitation control performance are discussed. A systematic scheme based on the normal forms method for the determination of nonlinear interaction between fundamental modes and excitation control modes in a stressed power system is developed;In a stressed power system, the interarea mode phenomenon may occur under large disturbance. Recent investigations revealed that the interarea mode may be among the power system fundamental modes of oscillation associated with the nonlinear modal interaction. If there is significant interaction, the controls will ...


Dimensions Of Flexibility In Apparel Production , Heidi Patricia Scheller Jan 1995

Dimensions Of Flexibility In Apparel Production , Heidi Patricia Scheller

Retrospective Theses and Dissertations

The purpose of this study was to inductively describe dimensions of flexibility in apparel manufacturing. Using qualitative methods, 38 interviews of apparel production consultants and managers were conducted in a variety of settings throughout the United States and in Honduras. Eighteen apparel production plants were toured. Attendance at two apparel research centers, three apparel production seminars, an apparel research conference, and a major apparel production trade show contributed to the study in the form of knowledge, documents, introductions to informants, and observations of apparel production equipment and techniques. Sales of the referent apparel firms ranged from 2.5 million to ...


Genetic-Based Unit Commitment Algorithm , Timothy Trent Maifeld Jan 1995

Genetic-Based Unit Commitment Algorithm , Timothy Trent Maifeld

Retrospective Theses and Dissertations

The National Energy Policy Act of 1992 allows open access to transmission lines. The electric utility industry is in the transition from operating in a monopolistic environment to one that is less regulated. For an electric utility to operate in this new environment, a new algorithm is needed to optimally schedule generating units in the needed response time of an electric power broker. Past methods of unit commitment scheduling are either too computationally slow or do not produce optimal unit commitment schedules. Unit commitment scheduling is the problem of determining the optimal set of generating units within a power system ...


Investigation Of The Relationship Between Fuel Injection Nozzle Roto Flow And Hydra Flow And The Engine Torque Of A Diesel Engine, Guang Jin Jan 1995

Investigation Of The Relationship Between Fuel Injection Nozzle Roto Flow And Hydra Flow And The Engine Torque Of A Diesel Engine, Guang Jin

Dissertations and Theses @ UNI

The purpose of this study was to investigate the possibility of reducing diesel engine torque variation by optimizing fuel injection nozzle tip configuration. In order to reduce engine torque variation, test runs were conducted to determine whether fuel injection nozzles affected diesel engine torque. There was a further effort to determine whether a correlation existed between the fuel injection nozzle roto flow and hydra flow, and the engine torque at specified engine speeds.

Engines installed in cotton pickers and tractors were used for this study. Engines, five from the cotton picker and five from the tractor group were chosen randomly ...


Bubble And Elutriation Control In Fluidized Beds With Electric Fields , Jiun-Shen Wang Jan 1995

Bubble And Elutriation Control In Fluidized Beds With Electric Fields , Jiun-Shen Wang

Retrospective Theses and Dissertations

The mechanisms for controlling elutriation and bubbling effect in a fluidized bed are largely unexplored. Increased understanding of these hydrodynamic effects will help to improve both fluidized bed design and operation;In the present study, an electric field was used as an independent parameter to control the formation of bubbles and the elutriation of fines in a fluidized bed. Various forces which acted on the particles were compared. It was concluded that both the current constriction force and hydrodynamic force dominated the behavior of the bed;The bed expansion increased as much as 15% of the bed height at the ...


Characterization Of Surface Profiles Using Discrete Measurement Systems , Tai-Hung Yang Jan 1995

Characterization Of Surface Profiles Using Discrete Measurement Systems , Tai-Hung Yang

Retrospective Theses and Dissertations

Form error estimation techniques based on discrete point measurements can lead to significant errors in form tolerance evaluation. By modeling surface profiles as random variables, we are able to show how sample size and fitting techniques affect form error estimation. Depending on the surface characteristics, typical sampling techniques can result in estimation errors of as much as 50%;We investigate current available interpolation procedures. Kriging is an optimal interpolation for spatial data when the model of variogram is known a priori. Due to the difficulty in identifying the correct variogram model from the limited sampled data and lack of complete ...


Market-Based Allocation Mechanisms For Lot-Size Decision Makers And Electric Power Utilities , Cheng-Kang Chen Jan 1995

Market-Based Allocation Mechanisms For Lot-Size Decision Makers And Electric Power Utilities , Cheng-Kang Chen

Retrospective Theses and Dissertations

The objective of this dissertation is to investigate how lot-size decision makers and electric power utilities determine critical economic quantities (e.g., the order quantities for the lot-size decision makers and the transmission service charges for the electric power utilities). A primary motivation of this study is to improve the economic efficiency (often measured in terms of cost saving) for lot-size decision makers and electric power utilities;For lot-size decision makers, we extend the traditional economic order quantity (EOQ) model by considering various aspects of model environments such as pricing policies. First, we investigate the inventory and disposal policies for ...


The Development And Testing Of New, Single And Multiple Echelon, Dynamic, Capacitated, Lot Sizing Heuristics , Robert Jay Mccoy Jan 1995

The Development And Testing Of New, Single And Multiple Echelon, Dynamic, Capacitated, Lot Sizing Heuristics , Robert Jay Mccoy

Retrospective Theses and Dissertations

Three new heuristics and two random problem generators are introduced and tested. These heuristics and problem generators are associated with single and multiple echelon, dynamic, capacitated lot sizing problems, with or without setup times. These types of problems often occur in an MRP environment;First, the Dixon and Silver (DS) lot sizing heuristic was extended. The new, single echelon heuristic offers improved cost performance at a small computational expense. It incorporates newly developed perturbation factors that allow for multiple iterations of the DS heuristic. At the conclusion of all iterations, the lowest cost production plan is recalled. The second, single ...


The Lrt Method Of Constructing A Two-Sided "Variables" Acceptance Region And Its Comparison With Other Methods , Ding-Hwa Lei Jan 1995

The Lrt Method Of Constructing A Two-Sided "Variables" Acceptance Region And Its Comparison With Other Methods , Ding-Hwa Lei

Retrospective Theses and Dissertations

W. A. Wallis1 proposed a method for constructing a two-sided variables acceptance sampling plan under the assumption that a quality characteristic of interest, X, has a normal distribution. This method has been introduced in some books, such as Schilling2, as an illustration of a two-sided variables acceptance sampling plan. George J. Resnikoff3 suggested another two-sided acceptance sampling plan based on the Uniformly Minimum-Variance Unbiased Estimator (UMVUE) of the fraction outside of specifications. The UMVUE method has long been used in U.S. Military Standards, and prescribed by the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO ...


Quo Vadis - A Framework For Intelligent Routing In Large Communication Networks , Armin Robert Mikler Jan 1995

Quo Vadis - A Framework For Intelligent Routing In Large Communication Networks , Armin Robert Mikler

Retrospective Theses and Dissertations

Modern communication networks contain hundreds if not thousands of interconnected nodes. Traffic management mechanisms must be able to support a cost-effective, responsive, flexible, robust, customer-oriented high speed communication environment while minimizing the overhead associated with management functions. Conventional traffic management mechanisms for routing and congestion control algorithms entail tremendous resource overhead in storage and update of network state information;Quo Vadis is an evolving framework for intelligent traffic management in very large communication networks. It is designed to exploit topological properties of large networks as well as their spatio-temporal dynamics to optimize multiple performance criteria through cooperation among nodes in ...


Manufacturing Cell Formation In A Fuzzy Environment , Chang-Chun Tsai Jan 1995

Manufacturing Cell Formation In A Fuzzy Environment , Chang-Chun Tsai

Retrospective Theses and Dissertations

The main objective of this study is to develop useful mathematical programming (FMP) models to solve cell formation (CF) problems in fuzzy environments. The dissertation was divided into three major parts. First, two mathematical programming models were developed to formulate the cell formation problems under consideration. The first model was a linear programming (LP) model for grouping parts and machines simultaneously into cells and solving the CF problem for dealing with exceptional elements (EEs). In second, a goal programming (GP) model to obtain a trade off between minimizing total cost of dealing with EEs and maximizing GE, a new similarity ...


The Status Of Cooperative Education/Work Program Experiences In Industrial Technology, Israel Colón Jr. Jan 1995

The Status Of Cooperative Education/Work Program Experiences In Industrial Technology, Israel Colón Jr.

Retrospective Theses and Dissertations

No abstract provided.


Perceived Importance Of Iso 9000 Factors As Indicators Of Quality In Industrial Technology Related Programs At Four-Year State Regional Universities, Floyd L. Olson Jan 1995

Perceived Importance Of Iso 9000 Factors As Indicators Of Quality In Industrial Technology Related Programs At Four-Year State Regional Universities, Floyd L. Olson

Dissertations and Theses @ UNI

Industry has often used a quality standard known as ISO 9000. No evidence has been located demonstrating the applicability of an industrial quality model to a singular academic department. The problem of this study was to determine if the guidelines for ISO 9004-2 could have been considered appropriate for Industrial Technology related programs and how they could have been used to indicate quality within such programs.

The purpose of this study was to seek knowledge relating the importance of ISO 9004-2 guidelines to audit and/or improve the quality management of Industrial Technology related departments at 4-year state regional universities ...


The Development And Application Of A Demand-Based Scheduling Heuristic For Paper Cutting Processes, Robert D. Mallon Jan 1995

The Development And Application Of A Demand-Based Scheduling Heuristic For Paper Cutting Processes, Robert D. Mallon

Theses and Dissertations

No abstract provided.


Manufacturing Process Analysis Of Ag/Pd Thick Film Conductor Circuits, Yen-Chang Tseng Jan 1995

Manufacturing Process Analysis Of Ag/Pd Thick Film Conductor Circuits, Yen-Chang Tseng

Theses and Dissertations

No abstract provided.


Neural Network Modelling Of Vehicle Interior Design Package, Deepak R. Garg Jan 1995

Neural Network Modelling Of Vehicle Interior Design Package, Deepak R. Garg

Theses and Dissertations

No abstract provided.


Software Design Of A Cell Controller For A Flexible Manufacturing System, Diane F. Livingston Jan 1995

Software Design Of A Cell Controller For A Flexible Manufacturing System, Diane F. Livingston

Theses and Dissertations

No abstract provided.


Comparing Traditional Statistical Models With Neural Network Models: The Case Of The Relation Of Human Performance Factors To The Outcomes Of Military Combat, William Oliver Hedgepeth Jan 1995

Comparing Traditional Statistical Models With Neural Network Models: The Case Of The Relation Of Human Performance Factors To The Outcomes Of Military Combat, William Oliver Hedgepeth

Engineering Management & Systems Engineering Theses & Dissertations

Statistics and neural networks are analytical methods used to learn about observed experience. Both the statistician and neural network researcher develop and analyze data sets, draw relevant conclusions, and validate the conclusions. They also share in the challenge of creating accurate predictions of future events with noisy data.

Both analytical methods are investigated. This is accomplished by examining the veridicality of both with real system data. The real system used in this project is a database of 400 years of historical military combat. The relationships among the variables represented in this database are recognized as being hypercomplex and nonlinear.

The ...


A Nonlinear Dynamic Method For Supporting Large-Scale Decision-Making In Uncertain Environments, Wayne Woodhams Jan 1995

A Nonlinear Dynamic Method For Supporting Large-Scale Decision-Making In Uncertain Environments, Wayne Woodhams

Engineering Management & Systems Engineering Theses & Dissertations

This research developed a methodology for supporting decision making by reducing uncertainty in decision environments which are too large, dynamic and complex to be treated by traditional quantitative and simulation techniques. These environments are complex because of the free choice associated with human involvement, and the existence of a large number of interrelated factors which influence the outcomes of the decision process. They are dynamic because the ground rules affecting those interrelationships are constantly changing. Uncertainty cannot be treated probabilistically, since identification of a full set of outcomes and factors of influence is not possible.

The venue for the investigation ...