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Sustainability

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Articles 1 - 30 of 33

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

Assessing Values-Based Sourcing Strategies In Regional Food Supply Networks: An Agent-Based Approach, Caroline C. Krejci, Michael C. Dorneich, Richard T. Stone Sep 2019

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

Michael C. Dorneich

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 ...


Aligning Skills In Personnel With The Lean System's Requirements, Anjushree Bangre May 2018

Aligning Skills In Personnel With The Lean System's Requirements, Anjushree Bangre

Masters Theses

The sustainability of lean systems for long term is a major concern across various organizations implementing lean manufacturing methods. This issue can be attributed to inadequate infrastructure, inefficient process management, unsuitable personnel management methods and strategic tools. There is a strong need for addressing the risks for lean system sustainability. The resolution of the risks from a 'soft side' (people) perspective has not been addressed. The primary focus of this study is on the people-related risks.

The current study elicits a five-phase approach to enhance the implementation of the lean system by accounting for these risks. The first phase classifies ...


Analysis Of Food Hub Commerce And Participation Using Agent-Based Modeling: Integrating Financial And Social Drivers, Caroline C. Krejci, Richard Stone, Michael Dorneich, Stephen B. Gilbert Apr 2017

Analysis Of Food Hub Commerce And Participation Using Agent-Based Modeling: Integrating Financial And Social Drivers, Caroline C. Krejci, Richard Stone, Michael Dorneich, Stephen B. Gilbert

Richard T. Stone

Objective: Factors influencing long-term viability of an intermediated regional food supply network (food hub) were modeled using agent-based modeling techniques informed by interview data gathered from food hub participants.

Background: Previous analyses of food hub dynamics focused primarily on financial drivers rather than social factors and have not used mathematical models.

Method: Based on qualitative and quantitative data gathered from 22 customers and 11 vendors at a midwestern food hub, an agent-based model (ABM) was created with distinct consumer personas characterizing the range of consumer priorities. A comparison study determined if the ABM behaved differently than a model based on ...


A Framework For Collaboration Among Regional Food System Participants, Anuj Mittal, Veronica M. White, Caroline Krejci Jan 2017

A Framework For Collaboration Among Regional Food System Participants, Anuj Mittal, Veronica M. White, Caroline Krejci

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Horizontal collaboration can benefit supply chain partners by increasing their collective competitiveness. However, each participant in the collaboration typically maintains its own individual business objectives. Therefore, such collaborations require a standard operational framework that specifies the allocation of participant responsibilities and benefits. While horizontal collaboration in regional food supply chains is common, very few participants have adopted this type of standard framework. As a result, the sharing of resources and information among partners tends to be inefficient and potentially contentious. This paper describes our efforts to formalize a supply chain collaboration that has developed among several regional food hubs and ...


Multi-Criteria Decision Making When Planning Sustainable Multimodal Transportation Routes In A Linear Corridor, Marie Louis Jan 2017

Multi-Criteria Decision Making When Planning Sustainable Multimodal Transportation Routes In A Linear Corridor, Marie Louis

Doctoral Dissertations

In urban and suburban locations, public transit can be seen as an effective mode

of daily transportation. The majority of the time, travelers would seek the cheapest, shortest, and possibly most eco-friendly means of transit. When designing public transit network systems, transportation planners and decision-makers, with input from stakeholders, should strive to optimize transportation services to meet the needs of the population most efficiently and at the lowest cost, that is, providing a transportation system that s the three E's of the sustainability concept: environment, social equity, and economic.

Previous studies have focused on sustainability as the primary concern ...


Market Competition And Social Welfare Analysis For E10 And E85 With A 1 Game Theory Model, Minwen Yang, Guiping Hu Oct 2016

Market Competition And Social Welfare Analysis For E10 And E85 With A 1 Game Theory Model, Minwen Yang, Guiping Hu

Guiping Hu

With the increasing concerns about the petroleum reserve, and the global warming, people have been looking for renewable and environmental friendly energy sources to supplement and replace fossil fuels. Ethanol has been an appropriate substitute to fossil fuels. Currently, E10 and E85 are two of the main transportation fuels with ethanol and they are competing in the market. This study investigates the competition between E10 and E85 with an oligopoly Cournot model and derives three indicators from the equilibrium to measure the performance of the market: E85's market share, E85 price premium which indicate the consumers' additional willingness to ...


Improving Carbon Efficiency Through Container Size Optimization And Shipment Consolidation, Nang Laik Ma, Kar Way Tan, Edwin Lik Ming Chong Sep 2016

Improving Carbon Efficiency Through Container Size Optimization And Shipment Consolidation, Nang Laik Ma, Kar Way Tan, Edwin Lik Ming Chong

Research Collection School Of Information Systems

Purpose: Many manufacturing companies that ship goods through full container loads found themselves under-utilizing the containers and resulting in higher carbon footprint per volume shipment. One of the reasons is the choice of non-ideal container sizes for their shipments. Consolidation fills up the containers more efficiently that reduces the overall carbon footprint. The objective of this paper is to support decisions on selection of appropriate combination of container sizes and shipment consolidation for a manufacturing company. We develop two-steps model which first takes the volumes to be shipped as an input and provide the combination of container sizes required; then ...


Analysis Of Food Hub Commerce And Participation Using Agent-Based Modeling: Integrating Financial And Social Drivers, Caroline C. Krejci, Richard Stone, Michael Dorneich, Stephen B. Gilbert Feb 2016

Analysis Of Food Hub Commerce And Participation Using Agent-Based Modeling: Integrating Financial And Social Drivers, Caroline C. Krejci, Richard Stone, Michael Dorneich, Stephen B. Gilbert

Industrial and Manufacturing Systems Engineering Publications

Objective: Factors influencing long-term viability of an intermediated regional food supply network (food hub) were modeled using agent-based modeling techniques informed by interview data gathered from food hub participants.

Background: Previous analyses of food hub dynamics focused primarily on financial drivers rather than social factors and have not used mathematical models.

Method: Based on qualitative and quantitative data gathered from 22 customers and 11 vendors at a midwestern food hub, an agent-based model (ABM) was created with distinct consumer personas characterizing the range of consumer priorities. A comparison study determined if the ABM behaved differently than a model based on ...


Hybrid Simulation Modeling For Regional Food Systems, Anuj Mittal Jan 2016

Hybrid Simulation Modeling For Regional Food Systems, Anuj Mittal

Graduate Theses and Dissertations

In response to concerns regarding the serious environmental and social issues associated with conventional food distribution systems, consumer demand for regionally-produced food is growing. Regional food hubs are playing a critical role in meeting this growing demand. Food hubs aggregate, distribute, and market regionally-produced food, with a goal of promoting and supporting environmental and social sustainability. They provide an alternative distribution channel through which small and mid-sized producers can access wholesale markets, and they improve consumer access to regional food at competitive prices. Despite the benefits they provide, food hubs struggle to maintain profitability, and they face many challenges to ...


Improving Regional Food Hub Operational Efficiency With Lean Practices, Anuj Mittal, Michelle Zugg, Caroline Krejci Jan 2016

Improving Regional Food Hub Operational Efficiency With Lean Practices, Anuj Mittal, Michelle Zugg, Caroline Krejci

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Food hubs aggregate and distribute regionally-produced food and help small and mid-sized farmers find markets for their products. They provide a valuable service as an intermediary between consumers and farmers who value sustainable food systems. However, their internal operations are often highly inefficient, and as a result they struggle to meet their customers’ expectations. To maintain low operational costs, food hubs often depend upon volunteer labor. However, an inconsistent and improperly trained volunteer labor force can lead to inventory and order fulfillment errors. Additionally, because many food hubs are unable to afford sophisticated inventory management software, they employ ad-hoc methods ...


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 ...


Empirical Study Utilizing Qfd To Develop An International Marketing Strategy, Cassandra C. Elrod, Sarah M. Stanley, Elizabeth A. Cudney, Caroline Fisher Aug 2015

Empirical Study Utilizing Qfd To Develop An International Marketing Strategy, Cassandra C. Elrod, Sarah M. Stanley, Elizabeth A. Cudney, Caroline Fisher

Business and Information Technology Faculty Research & Creative Works

Customer expectations can be extremely nebulous. This research identifies the demographic segmentations and their respective expectations for the spa market. Interviews were conducted and a subsequent questionnaire was employed to gather the voice of the customer and assess the expectations of spa clientele. All of the data was collected from luxury spas in Hawaii, and consisted of respondents from all over the world. Results of the survey suggest that while men want more tangible benefits of a spa, women prefer the experiential qualities of peace and rejuvenation. Additionally, those of lower to middle income focus on the atmosphere more than ...


Using The Triple Bottom Line To Select Sustainable Suppliers For A Major Oil And Gas Company, Pandarinath Adarsh Sunkari May 2015

Using The Triple Bottom Line To Select Sustainable Suppliers For A Major Oil And Gas Company, Pandarinath Adarsh Sunkari

Theses and Dissertations

Companies have primarily been focusing on the financial bottom line i.e., on increasing profits by increasing revenues and reducing costs. With high energy usage and environmental change posing threats to the environment and business operations, companies are now considering sustainability. Since some global suppliers have low cost labor, Social well-being and human development has also emerged as major goals of a company performing global operations. Focusing on these three goals is termed the "Triple Bottom Line" (TBL). We study and explore the TBL benefits that could be realized by an oil and gas company by focusing on sustainable suppliers ...


Incorporating Environmental And Social Factors Into Decision-Making Of An Oil And Gas Industry To Improve Sustainability, Gaurav Dabhadkar May 2015

Incorporating Environmental And Social Factors Into Decision-Making Of An Oil And Gas Industry To Improve Sustainability, Gaurav Dabhadkar

Theses and Dissertations

The energy industry (including the oil and gas industry) is facing unparalleled scrutiny and demands from stakeholders including investors, regulators (industry and environmental), communities, and other stakeholders. Sustainable development is one of the major concerns of the oil and gas industry. Companies are seeking to increase sustainability of their operations by considering environmental and Social concerns in addition to economic concerns. Oil and gas companies need to take decisions at different stages of the product life cycle (e.g. planning, design, exploration, production, and clean-up) which have direct or indirect impact on the organization's objectives. Addressing economic, technical, Social ...


A Framework For Sustainable Material Selection For Multi-Generational Components, Ryan T. Bradley Jan 2015

A Framework For Sustainable Material Selection For Multi-Generational Components, Ryan T. Bradley

Theses and Dissertations--Mechanical Engineering

The early stages of a product’s design are a critical time for decisions that impact the entire life-cycle cost. Product designers have mastered the first generation; however, they currently do not have the ability to know the impact of their decisions on the multi-generational view. This thesis aims at closing the gap between total life-cycle information and the traditional design process in order to harbor sustainable value creation among all stakeholders involved. A framework is presented that uses a combination of a life-cycle costing methodology and an evolutionary algorithm in order to achieve a sustainability assessment for a true ...


Mathematical Modeling For Platform-Based Product Configuration Considering Total Life-Cycle Sustainability, Tian Lan Jan 2015

Mathematical Modeling For Platform-Based Product Configuration Considering Total Life-Cycle Sustainability, Tian Lan

Theses and Dissertations--Mechanical Engineering

Many companies are using platform-based product designs to fulfill the requirements of customers while maintaining low cost. However, research that integrates sustainability into platform-based product design is still limited. Considering sustainability during platform-based design process is a challenge because the total life-cycle from pre-manufacturing, manufacturing and use to post-use stages as well as economic, environmental and societal performance in these stages must be considered. In this research, an approach for quantifying sustainability is introduced and a mathematical model is developed for identifying a more sustainable platform. Data from life-cycle assessment is used to quantify environmental factors; criteria from the Product ...


Modeling Sustainability In Renewable Energy Supply Chain Systems, Fei Xie Dec 2014

Modeling Sustainability In Renewable Energy Supply Chain Systems, Fei Xie

All Dissertations

This dissertation aims at modeling sustainability of renewable fuel supply chain systems against emerging challenges. In particular, the dissertation focuses on the biofuel supply chain system design, and manages to develop advanced modeling framework and corresponding solution methods in tackling challenges in sustaining biofuel supply chain systems. These challenges include: (1) to integrate 'environmental thinking' into the long-term biofuel supply chain planning; (2) to adopt multimodal transportation to mitigate seasonality in biofuel supply chain operations; (3) to provide strategies in hedging against uncertainty from conversion technology; and (4) to develop methodologies in long-term sequential planning of the biofuel supply chain ...


Analyzing Sustainable, Localized Food Production Systems With A Systematic Optimization Model, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt Nov 2014

Analyzing Sustainable, Localized Food Production Systems With A Systematic Optimization Model, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt

Susan W. Arendt

Localized food production and sourcing is drawing increasing attention due to environmental and health considerations. In this study, we used population, dietary and geographical information to map potential foodsheds with emphasis on minimizing total geographic distribution. We also developed innovative protocols, metrics and optimization methods to analyze the foodshed localization of geographic areas. We used data from Iowa to analyze and validate the optimization model. This study can also be extended to other regions outside of Iowa.


A Multidisciplinary Techno-Economic Decision Support Tool For Validating Long-Term Economic Viability Of Biorefining Processes, Sumesh Sukumara Jan 2014

A Multidisciplinary Techno-Economic Decision Support Tool For Validating Long-Term Economic Viability Of Biorefining Processes, Sumesh Sukumara

Theses and Dissertations--Chemical and Materials Engineering

Increasing demand for energy and transportation fuel has motivated researchers all around the world to explore alternatives for a long-term sustainable source of energy. Biomass is one such renewable resource that can be converted into various marketable products by the process of biorefining. Currently, research is taking strides in developing conversion techniques for producing biofuels from multiple bio-based feedstocks. However, the greatest concern with emerging processes is the long-term viability as a sustainable source of energy. Hence, a framework is required that can incorporate novel and existing processes to validate their economic, environmental and social potential in satisfying present energy ...


Applying Sustainability From A Systems Perspective:, Timothy Brophy Jun 2013

Applying Sustainability From A Systems Perspective:, Timothy Brophy

Master's Theses and Project Reports

Becoming sustainable is no longer an option. Current industry methods will not be able to support the necessary changes our growing society demands. In order to keep up with ever increasing demands industry will be aimed toward making major system changes toward a fully sustainable model. As of right now only basic sustainability actions have been put in place. Industry needs to make a strategic change toward resilient systems with an end goal of evolving into fully biomimic systems. This thesis covers a brief history of production leading to the Industrial Revolution which created a need for increased sustainability efforts ...


Sustainability In Industrial Logistics Operations, Vishnu Siddharth Somanur Paramasivam Apr 2013

Sustainability In Industrial Logistics Operations, Vishnu Siddharth Somanur Paramasivam

Purdue Polytechnic Directed Projects

CO2 concentration in the atmosphere has been rising at a rapid rate. As per the numbers quoted, the concentration has surpassed the safest upper limit suggested by the scientists. CO2 is a green-house gas and is partially responsible for global warming. With the current rate of emissions, it poses a threat to the planet's future and prosperity. Transportation contributes 30% of the overall CO2 emissions. Companies that use transportation are taking sustainability initiatives to reduce the emissions. This project documented some of the sustainability practices followed by the companies currently. It was found that the practices followed three general ...


Sustainable Purchasing Practices: An Investigation Into Current Industry Awareness And Practice, Frank Palisi, Kathryne Newton, Edward Sweeney Feb 2013

Sustainable Purchasing Practices: An Investigation Into Current Industry Awareness And Practice, Frank Palisi, Kathryne Newton, Edward Sweeney

Conference papers

This research study illustrates the importance of sustainable purchasing practices for organizations in the U.S. distribution industry and answers several important questions: what is the current awareness of U.S. organizations regarding sustainable purchasing practices; to what extent are U.S. organizations evaluating, selecting, and retaining suppliers based upon sustainable purchasing practices; and to what extent are sustainable purchasing practices being implemented by the U.S. organizations under study? With an ever increasing global economy, is it critically important for organizations to put in place sustainability practices; the biggest impact organizations can make is often in an organization’s ...


Market Competition And Social Welfare Analysis For E10 And E85 With A 1 Game Theory Model, Minwen Yang, Guiping Hu Jan 2013

Market Competition And Social Welfare Analysis For E10 And E85 With A 1 Game Theory Model, Minwen Yang, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

With the increasing concerns about the petroleum reserve, and the global warming, people have been looking for renewable and environmental friendly energy sources to supplement and replace fossil fuels. Ethanol has been an appropriate substitute to fossil fuels. Currently, E10 and E85 are two of the main transportation fuels with ethanol and they are competing in the market. This study investigates the competition between E10 and E85 with an oligopoly Cournot model and derives three indicators from the equilibrium to measure the performance of the market: E85's market share, E85 price premium which indicate the consumers' additional willingness to ...


Sustainability For Die Manufacturing: Comparative Study Of Wedm And Milling, Matthew S. Kalus Dec 2012

Sustainability For Die Manufacturing: Comparative Study Of Wedm And Milling, Matthew S. Kalus

Mechanical (and Materials) Engineering -- Dissertations, Theses, and Student Research

Sustainability is more important in today's culture due to the increasing demand for a more eco-friendly society. Concentrations in minimizing and reducing environmental impacts, energy and natural resources have been forthcoming in industry. The tool, mold and die industries are the most well known industries that machine harder materials using mills and WEDM. The objective of this thesis was to compare the sustainability differences in both of these machines utilizing the accepted standards for evaluating the manufacturing process performance for sustainability. These standards include the evaluation of the process parameters, raw materials, power, tools and fluids which all contribute ...


Reverse Logistics In The Heavy Machinery Industry, Shweta Chopra, Hugo Caballero, Chad Laux, Edie Schmidt, Hsiang-Lin Yang Nov 2012

Reverse Logistics In The Heavy Machinery Industry, Shweta Chopra, Hugo Caballero, Chad Laux, Edie Schmidt, Hsiang-Lin Yang

Shweta Chopra

Due to recent changes in environmental regulations and the increasing cost of raw materials and commodities, managing product returns has received wide spread attention from both practitioners and academicians. This document investigates the fundamental concepts behind the development of an integrated reverse logistics system. In order to develop a sustainable process into a competitive initiative, companies of several kinds of businesses have incorporated a reverse logistics process into their regular operation. For many companies, the reuse/recycle of materials and products can help earn money and at the same time build an image of being environmentally responsible. Finally, a case ...


Sustainable Purchasing Practices: An Investigation Into Current Industry Awareness And Practice., Francis X. Palisi Apr 2012

Sustainable Purchasing Practices: An Investigation Into Current Industry Awareness And Practice., Francis X. Palisi

Purdue Polytechnic Masters Theses

This research study illustrates the growing importance of sustainable purchasing practices and answers two important questions: what is the current awareness of U.S. organizations on sustainable purchasing practices with regards to evaluating, selecting, and retaining suppliers and to what extent are these practices being implemented? The research conducted is based upon an in-depth literature review of green purchasing and sustainability initiatives. With an ever increasing global economy with no intention of slowing down it is ever important to look towards sustainability practices and the biggest impact organizations can make is in the purchasing department. The researcher begins by explaining ...


A Socio-Technical Analysis Of Widespread Electric Vehicle Adoption, Onanwa Nneka Egbue Jan 2012

A Socio-Technical Analysis Of Widespread Electric Vehicle Adoption, Onanwa Nneka Egbue

Doctoral Dissertations

A combination of high fuel costs, concerns about petroleum availability, and environmental issues associated with conventional vehicles powered by fossil fuels are driving interests in electric vehicles (EVs). Large-scale deployment of EVs can play a significant role in addressing some of these problems. In spite of the benefits of EVs, several obstacles need to be overcome before EVs will be widely adopted. This research focuses on two socio-technical issues that affect widespread adoption and sustainability of EVs, consumer attitudes and perceptions, and supply chain risks of raw materials for EV battery technology. A major barrier is that consumers tend to ...


An Optimization Approach To Assessing The Self-Sustainability Potential Of Food Demand In The Midwestern United States, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt Oct 2011

An Optimization Approach To Assessing The Self-Sustainability Potential Of Food Demand In The Midwestern United States, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt

Apparel, Events and Hospitality Management Publications

Conventional agriculture faces significant challenges as world population grows, food demand increases, and mobility becomes increasingly constrained. Reducing the distance food needs to travel is an important goal of sustainability and resiliency, particularly in the context of a variety of transportation challenges. In this study, we developed a linear programming optimization method to assess the potential of regions to meet dietary requirements with more localized and diversified agricultural systems. Emphasis is on minimizing the distance between population centers and available cropland, accounting for variations in yield among 40 of the most marketable food crops that can be grown in the ...


Toward A More Sustainable, Local Food Production System—From A System Modeling Perspective, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt Jan 2011

Toward A More Sustainable, Local Food Production System—From A System Modeling Perspective, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt

Apparel, Events and Hospitality Management Publications

Localized food production and sourcing is drawing increasing attention due to environmental and health considerations. In this study, we used population, dietary and geographical information to map potential foodsheds with emphasis on minimizing total geographic distribution. We also developed innovative protocols, metrics and optimization methods to analyze the foodshed localization of geographic areas. We used data from Iowa to analyze and validate the optimization model. This study can also be extended to other regions outside of Iowa.


Analyzing Sustainable, Localized Food Production Systems With A Systematic Optimization Model, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt Jan 2011

Analyzing Sustainable, Localized Food Production Systems With A Systematic Optimization Model, Guiping Hu, Lizhi Wang, Susan W. Arendt, Randy Boeckenstedt

Apparel, Events and Hospitality Management Publications

Localized food production and sourcing is drawing increasing attention due to environmental and health considerations. In this study, we used population, dietary and geographical information to map potential foodsheds with emphasis on minimizing total geographic distribution. We also developed innovative protocols, metrics and optimization methods to analyze the foodshed localization of geographic areas. We used data from Iowa to analyze and validate the optimization model. This study can also be extended to other regions outside of Iowa.