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Operations Research, Systems Engineering and Industrial Engineering Commons

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Iowa State University

2015

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Articles 1 - 30 of 38

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

Mitigating Visually Induced Motion Sickness: A Virtual Hand-Eye Coordination Task, Michael Curtis, Kayla Dawson, Kelli Jackson, Liat Litwin, Chase Meusel, Michael Dorneich, Stephen Gilbert, Jonathan Kelly, Richard Stone, Eliot Winer Dec 2015

Mitigating Visually Induced Motion Sickness: A Virtual Hand-Eye Coordination Task, Michael Curtis, Kayla Dawson, Kelli Jackson, Liat Litwin, Chase Meusel, Michael Dorneich, Stephen Gilbert, Jonathan Kelly, Richard Stone, Eliot Winer

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Virtual reality has grown rapidly over the past decade, yet visually induced motion sickness (VIMS),continues to affect the usability of this technology. Aside from medicine, physical hand-eye-coordinationtasks have been found to be effective in mitigating symptoms of VIMS, however the need for equipmentoutside of virtual reality limits the usefulness of these mitigation techniques. In this study, 21 participantswere sickened via a virtual obstacle course and used one of two mitigation techniques. The first, naturaldecay, is simply waiting outside the virtual environment (VE) for symptoms to subside; the other was avirtual peg-in-hole task, performed in the VE with a gamepad ...


A Hybrid Simulation Model Of Inbound Logistics Operations In Regional Food Supply Systems, Anuj Mittal, Caroline C. Krejci Dec 2015

A Hybrid Simulation Model Of Inbound Logistics Operations In Regional Food Supply Systems, Anuj Mittal, Caroline C. Krejci

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Regional food hubs aggregate, distribute, and market local food, with a goal of promoting environmental and social sustainability. They provide an alternative distribution channel through which small-scale producers can access wholesale markets. However, food hubs face many barriers to growth and success. In particular, they are often unable to achieve the logistical and operational efficiencies that characterize conventional large-scale food distribution. One possible method of improving food hub efficiency targets inbound logistics operations - specifically, the scheduling of producer deliveries to the food hub. In this paper, we describe a hybrid simulation model of the inbound logistics operations of a food ...


Stakeholders' Requirements Assessment For Biofuel Production, Mostafa F. Fawzy, Paul J. Componation, Guiping Hu Nov 2015

Stakeholders' Requirements Assessment For Biofuel Production, Mostafa F. Fawzy, Paul J. Componation, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

Biofuel is one of the alternatives transportation fuel to substitute petroleum in the United States. Fast pyrolysis, as one of the most promising thermochemical based advanced biofuel production techniques, has been brought to the forefront of biofuel industry. With limited information about the manufacturing of fast pyrolysis units, a thorough understanding of stakeholders' requirements is timely and necessary. This study develops a comprehensive analysis of stakeholders' requirements. Subject matter experts were interviewed to rank, review, and evaluate a set of requirements for a variety of fast pyrolysis unit sizes. The requirements with the evaluations were then used to determine the ...


Assessing Values-Based Sourcing Strategies In Regional Food Supply Networks: An Agent-Based Approach, Caroline C. Krejci, Michael C. Dorneich, Richard T. Stone Oct 2015

Assessing Values-Based Sourcing Strategies In Regional Food Supply Networks: An Agent-Based Approach, Caroline C. Krejci, Michael C. Dorneich, Richard T. Stone

Industrial and Manufacturing Systems Engineering Publications

The recent increase in demand for regionally produced food has resulted in a need for more efficient distribution methods. To connect regional food producers and consumers, intermediated regional food supply networks have developed. The intermediary, known as a regional food hub, serves as an aggregation point for products and information. It may also act as a filter to ensure that the requirements of both producers and consumers are consistently met. This paper describes an empirically based agent-based model of a regional food network in central Iowa that is intermediated by a food hub. The model was used to test a ...


The Effect Of Time Delay On Emotion, Arousal, And Satisfaction In Human-Robot Interaction, Euijung Yang, Michael Dorneich Sep 2015

The Effect Of Time Delay On Emotion, Arousal, And Satisfaction In Human-Robot Interaction, Euijung Yang, Michael Dorneich

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

This study investigates the influence of time delay on user emotion, arousal, and satisfaction in humanrobotinteraction (HRI). Time delay is a gap between an input from a user and the corresponding feedbackresponse from the system, and its negative consequence on performance has been documented in variousareas including psychology and HRI. On the contrary, the effects of time delay on user emotion andsatisfaction have been difficult to establish due to the fluctuations in the emotional aspect of thephysiological state of the user. In this study, the hypothesis of whether time delay during robot vehicleoperation increases user arousal and negative emotions while ...


Techno-Economic Analysis Of Advanced Biofuel Production Based On Bio-Oil Gasification, Qi Li, Yanan Zhang, Guiping Hu Sep 2015

Techno-Economic Analysis Of Advanced Biofuel Production Based On Bio-Oil Gasification, Qi Li, Yanan Zhang, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

This paper evaluates the economic feasibility of a hybrid production pathway combining fast pyrolysis and bio-oil gasification. The conversion process is simulated with Aspen Plus® for a 2000 t d-1 facility. Techno-economic analysis of this fast pyrolysis and bio-oil gasification pathway has been conducted to assess the economic feasibility. A total capital investment of $438 million has been estimated and the minimum fuel selling price (MSP) is $5.6 per gallon of gasoline equivalent. The sensitivity analysis shows that the MSP is most sensitive to internal rate of return, fuel yield, biomass feedstock cost, and fixed capital investment. Monte-Carlo simulation ...


Is Now A Good Time For Iowa To Invest In Cellulosic Biofuels? A Real Options Approach Considering Construction Lead Times, Yihua Li, Chung-Li Tseng, Guiping Hu Sep 2015

Is Now A Good Time For Iowa To Invest In Cellulosic Biofuels? A Real Options Approach Considering Construction Lead Times, Yihua Li, Chung-Li Tseng, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

The revised Renewable Fuel Standard of the U.S. mandates a production of 16 billion gallons per year by 2022 from cellulosic biofuels. Iowa, rich in agricultural residues like corn stover, is a major player in contributing to the fulfillment of the cellulosic biofuels mandate. Is it a good time for Iowa to start investing in cellulosic biofuels? Using a fast pyrolysis facility as an example, we present a real options approach for valuing the investment of a new technology for producing cellulosic biofuels subject to construction lead times and uncertain fuel price. We conduct a case study on Iowa ...


Operator-Centered Task Analysis: A Hybrid Methodology For Human-Machine Interaction Observation In The Field, Chase Meusel, Norene Kelly, Stephen Gilbert, Michael Dorneich, Brian Gilmore, Bruce Newendorp Sep 2015

Operator-Centered Task Analysis: A Hybrid Methodology For Human-Machine Interaction Observation In The Field, Chase Meusel, Norene Kelly, Stephen Gilbert, Michael Dorneich, Brian Gilmore, Bruce Newendorp

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

The practice of human factors in agriculture presents numerous challenges for the researcher. Difficulties include measuring operator behaviors in the agricultural field as well as identifying individual tasks, order of tasks, length of tasks, and operator motivation for each task. To confidently build a baseline for how operators use and appropriate their resources during the planting agricultural season, a variety of qualitative and quantitative research methods were combined to create OCTA (operator-centered task analysis), a hybrid methodology to observe, document, explain, and potentially predict operator behaviors in the field. The OCTA model draws from four main methodologies: observation, interview, behavioral ...


Characteristics Of A Multi-User Tutoring Architecture, Stephen B. Gilbert, Eliot H. Winer, Joseph Holub, Trevor Richardson, Michael C. Dorneich, Michael Hoffman Jun 2015

Characteristics Of A Multi-User Tutoring Architecture, Stephen B. Gilbert, Eliot H. Winer, Joseph Holub, Trevor Richardson, Michael C. Dorneich, Michael Hoffman

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Intelligent tutor systems have been quite successful in instruction of individuals (Koedinger, Anderson, Hadley, & Mark, 1997; Ritter, Kulikowich, Lei, McGuire, & Morgan, 2007; Vanlehn, et al., 2005), but multiple challenges exist when attempting to tutor a team. Sottilare, Holden, Brawner, and Goldberg (2011) describe some of the architectural challenges of team tutoring at a high level in terms of functional requirements. In this paper we describe specific challenges in terms of implementing a team architecture within the Generalized Intelligent Framework for Tutoring (GIFT), including simultaneous startup and synchronization with distributed team members, maintaining state of multiple users, and timing feedback for teams and individuals appropriately.


Multiple Two-State Classifier Output Fusion System And Method, Stephen Whitlow, Michael C. Dorneich May 2015

Multiple Two-State Classifier Output Fusion System And Method, Stephen Whitlow, Michael C. Dorneich

Industrial and Manufacturing Systems Engineering Patents

A system and method for providing more than two levels of classification distinction of a user state are provided. The first and second general states of a user are sensed. The first general state is classified as either a first state or a second state, and the second general state is classified as either a third state or a fourth state. The user state of the user is then classified as one of at least three different classification states.


Integration Of Progressive Hedging And Dual Decomposition In Stochastic Integer Programs, Ge Guo, Gabriel Hackebeil, Sarah M. Ryan, Jean-Paul Watson, David L. Woodruff May 2015

Integration Of Progressive Hedging And Dual Decomposition In Stochastic Integer Programs, Ge Guo, Gabriel Hackebeil, Sarah M. Ryan, Jean-Paul Watson, David L. Woodruff

Industrial and Manufacturing Systems Engineering Publications

We present a method for integrating the Progressive Hedging (PH) algorithm and the Dual Decomposition (DD) algorithm of Carøe and Schultz for stochastic mixed-integer programs. Based on the correspondence between lower bounds obtained with PH and DD, a method to transform weights from PH to Lagrange multipliers in DD is found. Fast progress in early iterations of PH speeds up convergence of DD to an exact solution. We report computational results on server location and unit commitment instances.


Situation Aftermath Management System And Method, Michael C. Dorneich, Chris Hamblin, William Rogers, Stephen Whitlow Apr 2015

Situation Aftermath Management System And Method, Michael C. Dorneich, Chris Hamblin, William Rogers, Stephen Whitlow

Industrial and Manufacturing Systems Engineering Patents

A system and method for assisting flight crew recovery in the aftermath of an unexpected event is provided. A processor is used to detect that an unexpected event has occurred in an aircraft and, in response to detecting that the unexpected event has occurred, state data are stored in memory. The processor is also used to detect that the unexpected event has been resolved and, in response to detecting that the unexpected event has been resolved, the processor retrieves the state data from the memory, generates an aftermath plan that includes prompts to guide the flight crew to complete the ...


Toward Scalable Stochastic Unit Commitment. Part 2: Solver Configuration And Performance Assessment, Kwok Cheung, Dinakar Gade, Cesar Silva-Monroy, Sarah M. Ryan, Jean-Paul Watson, Roger Wets, David L. Woodruff Apr 2015

Toward Scalable Stochastic Unit Commitment. Part 2: Solver Configuration And Performance Assessment, Kwok Cheung, Dinakar Gade, Cesar Silva-Monroy, Sarah M. Ryan, Jean-Paul Watson, Roger Wets, David L. Woodruff

Industrial and Manufacturing Systems Engineering Publications

In this second portion of a two-part analysis of a scalable computa- tional approach to stochastic unit commitment, we focus on solving stochastic mixed-integer programs in tractable run-times. Our solution technique is based on Rockafellar and Wets' progressive hedging algorithm, a scenario-based decomposi- tion strategy for solving stochastic programs. To achieve high-quality solutions in tractable run-times, we describe critical, novel customizations of the progressive hedging algorithm for stochastic unit commitment. Using a variant of the WECC- 240 test case with 85 thermal generation units, we demonstrate the ability of our approach to solve realistic, moderate-scale stochastic unit commitment problems with ...


Toward Scalable Stochastic Unit Commitment. Part 1: Load Scenario Generation, Yonghan Feng, Ignacio Rios, Sarah M. Ryan, Kai Spurkel, Jean-Paul Watson, Roger Wets, David L. Woodruff Apr 2015

Toward Scalable Stochastic Unit Commitment. Part 1: Load Scenario Generation, Yonghan Feng, Ignacio Rios, Sarah M. Ryan, Kai Spurkel, Jean-Paul Watson, Roger Wets, David L. Woodruff

Industrial and Manufacturing Systems Engineering Publications

Unit commitment decisions made in the day-ahead market and during subsequent reliability assessments are critically based on forecasts of load. Tra- ditional, deterministic unit commitment is based on point or expectation-based load forecasts. In contrast, stochastic unit commitment relies on multiple load sce- narios, with associated probabilities, that in aggregate capture the range of likely load time-series. The shift from point-based to scenario-based forecasting necessi- tates a shift in forecasting technologies, to provide accurate inputs to stochastic unit commitment. In this paper, we discuss a novel scenario generation method- ology for load forecasting in stochastic unit commitment, with application to ...


Adaptive User Interface For Semi-Automatic Operation, Michael C. Dorneich, Stephen Whitlow, William Rogers, Karen Feigh, Robert E. De Mers Mar 2015

Adaptive User Interface For Semi-Automatic Operation, Michael C. Dorneich, Stephen Whitlow, William Rogers, Karen Feigh, Robert E. De Mers

Industrial and Manufacturing Systems Engineering Patents

A method is provided for semi-automatic operation of a portable control device for a remote-controlled, unmanned vehicle. The method includes the steps of monitoring parameters of an operational environment of the portable control device, switching from a manual operation mode to a semi-automatic operation mode in response to occurrence of predetermined criteria within the operational environment, and presenting a semi-automatic operation graphical user interface to a user of the portable control device. The semi-automatic operation graphical user interface includes a reduced set of user interfaces for the semi-automatic operation mode presented by the portable control device.


A Systems-Level Perspective Of The Biomechanics Of The Trunk Flexion-Extension Movement: Part I – Normal Low Back Condition, Sangeun Jin, Gary A. Mirka Mar 2015

A Systems-Level Perspective Of The Biomechanics Of The Trunk Flexion-Extension Movement: Part I – Normal Low Back Condition, Sangeun Jin, Gary A. Mirka

Industrial and Manufacturing Systems Engineering Publications

Most of the previous studies of the lumbar region have not considered the influence of pelvic and lower extremity characteristics on the performance of the lumbar region. The goal of the current study was to explore these more systems-level effects by assessing the effects of a pelvic/lower extremity constraint on the biomechanical response of the lumbar spine in an in-vivo experiment. Twelve participants performed full range of motion, sagittal-plane trunk flexion-extension movements under two conditions: unconstrained stoop movement and pelvic/lower extremity constrained stoop movement (six repetitions in each condition over three days). Kinematics and muscle activities of the ...


The Team Multiple Errands Test: A Platform To Evaluate Distributed Teams, Jamiahus Walton, Desmond Carletus Bonner, Kelsey Walker, Samantha Mater, Michael C. Dorneich, Stephen B. Gilbert, Robert West Mar 2015

The Team Multiple Errands Test: A Platform To Evaluate Distributed Teams, Jamiahus Walton, Desmond Carletus Bonner, Kelsey Walker, Samantha Mater, Michael C. Dorneich, Stephen B. Gilbert, Robert West

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Teams have the ability to achieve goals that are unobtainable by individuals alone. However, there is little agreement on a standard model for researching the performance of distributed teams. Initial pilot results suggest that the Multiple Errands Test (MET), when adapted to a team in a virtual environment, is a platform for evaluating the impact of feedback characteristics. To demonstrate the potential of the Team MET as a platform for future team research in the broader CSCW community, an example study is described in which team members are given feedback in one of four conditions: individual private, team private, individual ...


A Systems-Level Perspective Of The Biomechanics Of The Trunk Flexion-Extension Movement: Part Ii – Fatigued Low Back Conditions, Sangeun Jin, Gary A. Mirka Mar 2015

A Systems-Level Perspective Of The Biomechanics Of The Trunk Flexion-Extension Movement: Part Ii – Fatigued Low Back Conditions, Sangeun Jin, Gary A. Mirka

Industrial and Manufacturing Systems Engineering Publications

Our companion paper demonstrated the importance of a systems-level perspective on spine biomechanics by showing the effects of lower extremity constraints during simple, trunk flexion-extension motions. This paper explores the impact of trunk muscle fatigue and stress-relaxation of lumbar passive tissues on this systems-level response. Twelve participants performed experimental protocols to achieve lumbar passive tissue stress-relaxation fatigue and lumbar muscle fatigue. Participants performed full range of sagittal-plane trunk flexion-extension under unconstrained stoop movement and pelvic/lower extremity constrained stoop movement. They performed these motions both before and after the fatigue protocols and trunk kinematics and muscle activities in trunk and ...


Workload Management System And Method, Michael C. Dorneich, William Rogers, Stephen Whitlow, Chris Hamblin, Claudia Keinrath Jan 2015

Workload Management System And Method, Michael C. Dorneich, William Rogers, Stephen Whitlow, Chris Hamblin, Claudia Keinrath

Industrial and Manufacturing Systems Engineering Patents

A system and method are provided for facilitating workload management. The system processes first sensor data to estimate the current cognitive state of a first person, and processes second sensor data to estimate the current cognitive state of a second person. Information representative of the estimates of the current cognitive states of the first person and the second person is simultaneously rendered on a display device.


A Design Framework For Off-Road Equipment Automation, Brian L. Steward, Lie Tang, Shufeng Han Jan 2015

A Design Framework For Off-Road Equipment Automation, Brian L. Steward, Lie Tang, Shufeng Han

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Design frameworks can be helpful in the development of complex systems needed to automate machines. Designing autonomous off-road machinery requires having the means for managing the complexity of multiple interacting systems. A design framework, consisting of four technical layers, is presented. These layers are (1) machine architecture, (2) machine awareness, (3) machine control, and (4) machine behavior. Examples of technology advanced in development efforts of autonomous, robotic platforms for agricultural applications are provided. Linkages were made to applications in the construction machinery sector. Similarities between agricultural and construction automation exist in each of the technical layers.


Multi-Agent Simulation Modeling Of Supplier Selection For Local Food Systems, Hardik D. Bora, Caroline C. Krejci Jan 2015

Multi-Agent Simulation Modeling Of Supplier Selection For Local Food Systems, Hardik D. Bora, Caroline C. Krejci

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Consumer demand for regionally-produced food has increased dramatically in the past decade, in response to concerns over food safety and quality, as well as the serious environmental, economic, and social equity issues that pervade the modern industrial food supply system. As demand grows, distributors of regionally-produced food (i.e., food hubs) face many challenges in their efforts to scale up, particularly with supply chain management. They must find ways to operate more efficiently without undermining their support for the regional farming community. In this paper we describe a multi-agent simulation model of a theoretical regional food system in which multiple ...


The Development Of A Testbed To Assess An Intelligent Tutoring System For Teams, Desmond Bonner, Jamiahus Walton, Michael C. Dorneich, Stephen B. Gilbert, Robert A. Sottilare Jan 2015

The Development Of A Testbed To Assess An Intelligent Tutoring System For Teams, Desmond Bonner, Jamiahus Walton, Michael C. Dorneich, Stephen B. Gilbert, Robert A. Sottilare

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Work has been ongoing to develop an Intelligent Tutoring System (ITS) for teams. As part of this work, we are developing a flexible, scalable, military-based set of collaborative team tasks that can serve as a “testbed” to exercise various aspects of a team ITS architecture. Warfighting teams are a core part of any operation as individual soldiers combine their skill sets and plan, coordinate and act as one entity to accomplish assigned objectives. The team ITS test bed presented in this paper uses simple team tasks to train soldiers on basic functions including observation, target detection, target identification, communication within ...


Virtual Operator Modeling Approach For Construction Machinery, Yu Du, Michael C. Dorneich, Brian L. Steward, Eric R. Anderson, Lawrence F. Kane, Brian J. Gilmore Jan 2015

Virtual Operator Modeling Approach For Construction Machinery, Yu Du, Michael C. Dorneich, Brian L. Steward, Eric R. Anderson, Lawrence F. Kane, Brian J. Gilmore

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Greater understanding of how highly skilled operators achieve high machine performance and productivity can inform the development of automation technology for construction machinery. Current human operator models, however, have limited fidelity and may not be useful for machinery automation. In addition, while physical modeling and simulation is widely employed in product development, current operator simulation models may be a limiting factor in assessing the performance envelope of virtual prototypes. A virtual operator modelling approach for construction machinery was developed. Challenges to the development of human operator models include determining what cues and triggers human operators use, how human operators make ...


Evaluating Producer Selection Policies In Intermediated Regional Food Distribution Systems: An Agent-Based Approach, Caroline C. Krejci, Richard T. Stone, Michael C. Dorneich, Stephen B. Gilbert Jan 2015

Evaluating Producer Selection Policies In Intermediated Regional Food Distribution Systems: An Agent-Based Approach, Caroline C. Krejci, Richard T. Stone, Michael C. Dorneich, Stephen B. Gilbert

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

The recent increase in demand for regionally-produced food has resulted in a need for more efficient distribution methods. To connect regional food producers and consumers, intermediated regional food supply networks have developed. The intermediary, known as a regional food hub, serves as an aggregation point for products and information and may also act as a filter to ensure that the requirements of both producers and consumers are consistently met. This paper describes an empirically-based agent-based model of a regional food network in central Iowa that is intermediated by a food hub. The model was used to test a variety of ...


Flight Deck Information Automation: A Human-In-The-Loop In-Trail Procedure Simulation Study, Emmanuel Letsu-Dake, William Rogers, Stephen D. Whitlow, Michael Dillard, Michael C. Dorneich, Rachel Dudley Jan 2015

Flight Deck Information Automation: A Human-In-The-Loop In-Trail Procedure Simulation Study, Emmanuel Letsu-Dake, William Rogers, Stephen D. Whitlow, Michael Dillard, Michael C. Dorneich, Rachel Dudley

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Information automation systems are generally intended to support pilot tasks and improve flightcrew awareness and decision making, but not to directly control the aircraft or its systems. As a result these systems do not include cases where automation decisions and actions directly affect the aircraft performance, flight path or systems. Next Generation Air Transportation System (NextGen) operational concepts and technologies will dramatically affect both the types and amount of information available on flight decks. Much of that information will be produced by flight deck information automation systems that collect, process, and present that information to the flightcrew. It is therefore ...


Evaluating Distributed Teams With The Team Multiple Errands Test, Jamiahus Walton, Stephen B. Gilbert, Eliot Winer, Michael C. Dorneich, Desmond Bonner Jan 2015

Evaluating Distributed Teams With The Team Multiple Errands Test, Jamiahus Walton, Stephen B. Gilbert, Eliot Winer, Michael C. Dorneich, Desmond Bonner

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Modern day teams, whether in the military or civilian workplace, have the ability to achieve goals that are otherwise unobtainable by individuals. The timing and characteristics of feedback that teams receive during training are critical. Though there is a solid foundation of research on optimal feedback, there is limited exploration of what constitutes ideal team feedback including addressing the individual team member versus the whole team and whether that feedback is public (visible to the entire team) or private (visible only to one member of the team). Previous research that studied the effect of feedback on team performance has yielded ...


Comparing Systems Engineering And Project Success In Commercial-Focused Versus Government-Focused Projects, Paul J. Componation, Michael C. Dorneich, Jordan L. Hansen Jan 2015

Comparing Systems Engineering And Project Success In Commercial-Focused Versus Government-Focused Projects, Paul J. Componation, Michael C. Dorneich, Jordan L. Hansen

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

This work looks at the relationship between systems engineering and project success industry lead in aerospace, agriculture, defense & security, energy and related areas. The projects included both commercial-focused and government-focused efforts. Differences were found in both the overall risk levels and the measures of success for the two groups. In addition, government-focused projects showed a notably larger number of significant relationships between system engineering processes and project success than the commercial-focused projects. The research notes that further investigation is warranted, in particular looking at individual industry sectors, exploring the impact of team dispersion, and developing a better understanding of interrelationships ...


Evaluation Of The Impacts Of Governmental Policies On The Biofuels Supply Chain Design Under Uncertainty, Narges Kazemzadeh, Guiping Hu Jan 2015

Evaluation Of The Impacts Of Governmental Policies On The Biofuels Supply Chain Design Under Uncertainty, Narges Kazemzadeh, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

There is a growing interest in the use of biomass as a source of energy around the world. In the United States, the Renewable Fuel Standard (RFS) sets policies and mandates to support the production and consumption of biofuels. However, the uncertainties associated with the governmental and local policies and regulations on both production and consumption have imposed significant impacts on the biofuel supply chain network. This study aims to determine the optimal design of the biofuel supply chain to maximize annual profit under the impacts of governmental policies. In this study, two-stage stochastic programming models are developed in which ...


Allocating Resources To Enhance Resilience, With Application To Superstorm Sandy And An Electric Utility, Cameron A. Mackenzie, Christopher W. Zobel Jan 2015

Allocating Resources To Enhance Resilience, With Application To Superstorm Sandy And An Electric Utility, Cameron A. Mackenzie, Christopher W. Zobel

Industrial and Manufacturing Systems Engineering Publications

This article constructs a framework to help a decisionmaker allocate resources to increase his or her organization's resilience to a system disruption, where resilience is measured as a function of the average loss per unit time and the time needed to recover full functionality. Enhancing resilience prior to a disruption involves allocating resources from a fixed budget to reduce the value of one or both of these characteristics. We first look at characterizing the optimal resource allocations associated with several standard allocation functions. Because the resources are being allocated before the disruption, however, the initial loss and recovery time ...


The Use Of Virtual Welding Simulators To Evaluate Experienced Welders, A.P. Byrd, R.G. Anderson, Richard Stone Jan 2015

The Use Of Virtual Welding Simulators To Evaluate Experienced Welders, A.P. Byrd, R.G. Anderson, Richard Stone

Industrial and Manufacturing Systems Engineering Publications

Virtual reality welding simulations have been, and continue to be, a trend in welding training programs. The goal of this study was to examine the use of virtual reality simulations as an assessment tool for existing welders. This study used a virtual reality welding simulator, VRTEX® 360, to assess the existing skills of experienced and trained novice welders. This study also used the shielded metal arc welding (SMAW) process to perform simple and complex welds. Performance was evaluated through a quality score, which was based on the following five welding parameters: arc length, position, work angle, travel angle, and travel ...