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Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Abet Outcome Assessment And Improvement Through The Capstone Design Course In An Industrial Engineering Curriculum, Leslie Potter, Shantha Esther Daniel, Devna F. Popejoy-Sheriff, Kyung J. Min Jun 2006

Abet Outcome Assessment And Improvement Through The Capstone Design Course In An Industrial Engineering Curriculum, Leslie Potter, Shantha Esther Daniel, Devna F. Popejoy-Sheriff, Kyung J. Min

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

In this paper, for the capstone design course, we first show how we demonstrate that our IE majors attain the ABET outcome items (c) and (h) where (c) is an ability to design a system, component, or process to meet desired needs within realistic constraints such as economic, environmental, social, political, ethical, health and safety, manufacturability, and sustainability and (h) is the broad education necessary to understand the impact of engineering solutions in a global, economic, environmental, and societal context. To achieve this, we utilize rubrics that are primarily filled out by the instructors and surveys that are filled out ...


Intellectual Property Protection In Collaborative Design Through Lean Information Modeling And Sharing, Yan Wang, Pamela N. Ajoku, José C. Brustoloni, Bart O. Nnaji Jun 2006

Intellectual Property Protection In Collaborative Design Through Lean Information Modeling And Sharing, Yan Wang, Pamela N. Ajoku, José C. Brustoloni, Bart O. Nnaji

Center for e-Design Publications

Establishing efficient, effective, and trustworthy engineering collaboration while protecting intellectual property is vital to maintain organizational competence in today’s global business environment. In this paper, a lean information modeling and sharing framework is described to support engineering data security management in a peer-to-peer collaborative environment. It allows for selective and interoperable data sharing with fine-grained access control at both the server and client sides, thus securing different levels of design information dissemination for intellectual property protection purposes. The considerations of time and value-adding activity with roles, policy delegation relation in a distributed context, and fine-grained control at data set ...


Machinability Analysis For 3-Axis Flat End Milling, Ye Li, Matthew C. Frank May 2006

Machinability Analysis For 3-Axis Flat End Milling, Ye Li, Matthew C. Frank

Industrial and Manufacturing Systems Engineering Publications

This paper presents a method for geometric machinability analysis. The implementation of the strategy determines the machinability of a part being processed using a plurality of 3-axis machining operations about a single axis of rotation for setup orientations. Slice file geometry from a stereolithography model is used to map machinable ranges to each of the line segments comprising the polygonal chains of each slice. The slices are taken orthogonal to the axis of rotation, hence, both two- and three- dimensional (2D and 3D) machinability analysis is calculated for perpendicular and oblique tool orientations, respectively. This machinability approach expands upon earlier ...


Determining Setup Orientations From The Visibility Of Slice Geometry For Rapid Computer Numerically Controlled Machining, Matthew C. Frank, Richard A. Wysk, Sanjay B. Joshi Feb 2006

Determining Setup Orientations From The Visibility Of Slice Geometry For Rapid Computer Numerically Controlled Machining, Matthew C. Frank, Richard A. Wysk, Sanjay B. Joshi

Industrial and Manufacturing Systems Engineering Publications

A method for rapid computer numerically controlled (CNC) machining is being developed in an effort to automatically create functional prototypes and parts in a wide array of materials. The method uses a plurality of simple two-and-a-half-dimensional (21/2-D) toolpaths from various orientations about an axis of rotation in order to machine the entire surface of a part without refixturing. It is our goal to automatically create these toolpaths for machining and eliminate the complex planning traditionally associated with CNC machining. In this paper, we consider a problem that arises in automating this process - visibility to the surface of a model ...


Utilizing Assistive Technology Design Projects And Interdisciplinary Teams To Foster Inquiry And Learning In Engineering Design, Janis P. Terpenny, Richard M. Goff, Mitzi R. Vernon, William R. Green Jan 2006

Utilizing Assistive Technology Design Projects And Interdisciplinary Teams To Foster Inquiry And Learning In Engineering Design, Janis P. Terpenny, Richard M. Goff, Mitzi R. Vernon, William R. Green

Center for e-Design Publications

In industry, successful products and systems usually require a collaborative design process with a multitude of participating stakeholders (customers, sales/marketing, industrial designers, engineering designers from various engineering disciplines, manufacturing, distribution, etc.). Addressing this future work environment, interdisciplinary teaming has become an important element of student design projects. For the last several years at Virginia Tech, interdisciplinary design projects have been created with teams of students from the first year Exploration of Engineering Design course in the College of Engineering and students from the second year Industrial Design Program in the College of Architecture and Urban Studies. While students and ...


Optimal Price And Quantity Of Refurbished Products, Jumpol Vorasayan, Sarah M. Ryan Jan 2006

Optimal Price And Quantity Of Refurbished Products, Jumpol Vorasayan, Sarah M. Ryan

Industrial and Manufacturing Systems Engineering Publications

Many retail product returns can be refurbished and resold, typically at a reduced price. The price set for the refurbished products affects the demands for both new and refurbished products, while the refurbishment and resale activities incur costs. To maximize profit, a manufacturer in a competitive market must carefully choose the proportion of returned products to refurbish and their sale price. We model the sale, return, refurbishment, and resale processes in an open queueing network and formulate a mathematical program to find the optimal price and proportion to refurbish. Examination of the optimality conditions reveals the different situations in which ...


Calibration, Error Analysis, And Ongoing Measurement Process Monitoring For Mass Spectrometry, Stephen B. Vardeman, Joanne Wendelberger, Lily Wang Jan 2006

Calibration, Error Analysis, And Ongoing Measurement Process Monitoring For Mass Spectrometry, Stephen B. Vardeman, Joanne Wendelberger, Lily Wang

Industrial and Manufacturing Systems Engineering Publications

We consider problems of quantifying and monitoring accuracy and precision of measurement in mass spectrometry, particularly in contexts where there is unavoidable day-to-day/period-to-period changes in instrument sensitivity. First, we consider the issue of estimating instrument sensitivity based on data from a typical calibration study. Simple method-of-moments methods, likelihood-based methods, and Bayes methods based on the one-way random effects model are illustrated. Then, we consider subsequently assessing the precision of an estimate of a mole fraction of a gas of interest in an unknown. Finally, we turn to the problem of ongoing measurement process monitoring and illustrate appropriate setup of ...


Effect Of Sample Aging On The Accuracy Of The International Energy Agency's Tar Measurement Protocol, Ming Xu, Robert C. Brown, Glenn Norton Jan 2006

Effect Of Sample Aging On The Accuracy Of The International Energy Agency's Tar Measurement Protocol, Ming Xu, Robert C. Brown, Glenn Norton

Mechanical Engineering Publications

The Working Group of the Biomass Gasification Task of the International Energy Agency (IEA) Bioenergy Agreement has developed a protocol for sampling and analysis of tar and particulates from biomass gasifiers, which is commonly accepted as a standard for reliable measurement of tar in producer gas. The methodology is dependent upon dissolving tar in a solvent for subsequent recovery by evaporation or distillation. This paper investigates whether storage of the tar/solvent sample prior to analysis affects the accuracy of the tar measurement. On the basis of the results of this study, we recommend that samples be analyzed within a ...