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Articles 31 - 60 of 176

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

Decision Modeling For Housing And Community Development: A Methodology For Evidence-Based Urban And Regional Planning, Michael P. Johnson Jr. Aug 2017

Decision Modeling For Housing And Community Development: A Methodology For Evidence-Based Urban And Regional Planning, Michael P. Johnson Jr.

Michael P. Johnson

Urban community development corporations and other local institutions routinely face challenging problems in housing and economic development that require substantial expertise in data analytics and decision modeling. Recent research, inspired by local responses to the housing foreclosure crisis, and developed in cooperation with Boston-area CDCs, has resulted in a collection of applications that can assist CDCs and similar organizations to design local interventions for acquisition and redevelopment of housing. This paper describes these applications. The first of these is values and objective design, i.e. the process of identifying decision opportunities. The second of these is data analytics, or the ...


Simulation Modeling Approach For Evaluating A Solution Designed To Alleviate The Congestion Of Passenger Flow At The Composure Area Of Security Checkpoints, Maria Luisa Janer Rubio Aug 2017

Simulation Modeling Approach For Evaluating A Solution Designed To Alleviate The Congestion Of Passenger Flow At The Composure Area Of Security Checkpoints, Maria Luisa Janer Rubio

Theses and Dissertations

In a previous study, we found that replacing the exit roller of a security checkpoint lane for a continuously circulating conveyor could potentially increase the throughput of passengers by over 28% while maintaining the TSA security-waiting time limit (Janer and Rossetti 2016). This study intends to expand this previous effort by investigating the impact of this circulating conveyor on the secondary screening related processes. Leone and Liu (2011) found that imposing a limit on the x-ray screening time, and diverting any item exceeding this limit to secondary screening, could decrease the waiting time by 43%. Our objective is to verify ...


A Multi-Agent System For Coordinating Vessel Traffic, Teck-Hou Teng, Hoong Chuin Lau, Akshat Kumar May 2017

A Multi-Agent System For Coordinating Vessel Traffic, Teck-Hou Teng, Hoong Chuin Lau, Akshat Kumar

Research Collection School Of Information Systems

Environmental, regulatory and resource constraints affects the safety and efficiency of vessels navigating in and out of the ports. Movement of vessels under such constraints must be coordinated for improving safety and efficiency. Thus, we frame the vessel coordination problem as a multi-agent path-finding (MAPF) problem. We solve this MAPF problem using a Coordinated Path-Finding (CPF) algorithm. Based on the local search paradigm, the CPF algorithm improves on the aggregated path quality of the vessels iteratively. Outputs of the CPF algorithm are the coordinated trajectories. The Vessel Coordination Module (VCM) described here is the module encapsulating our MAPF-based approach for ...


Refugees In Urban Environments: Social, Economic, And Infrastructure Impacts, Garrett L. Jameson Mar 2017

Refugees In Urban Environments: Social, Economic, And Infrastructure Impacts, Garrett L. Jameson

Theses and Dissertations

The United Nations High Commissioner for Refugees has estimated that in 2015 there were 21.3 million refugees worldwide; it is estimated that 1.8 million of these persons were newly displaced during 2015. As refugees leave their country to seek the protection of another nation's government, they generally flow into urban areas. The impact of this flow on cities and on the refugees, themselves, is not fully understood. This study is focused on the impact of government policy decisions on the social, legal, and economic integration of refugees within an urban environment. Investigation into this topic resulted in ...


Identifying Key Factors Of Rail Transit Service Quality: An Empirical Analysis For Istanbul, Erkan Isikli, Nezir Aydin, Erkan Celik, Alev Taskin Gumus Mar 2017

Identifying Key Factors Of Rail Transit Service Quality: An Empirical Analysis For Istanbul, Erkan Isikli, Nezir Aydin, Erkan Celik, Alev Taskin Gumus

Journal of Public Transportation

Providing a high quality of service in public transportation is essential to reduce dissatisfactions stemming from traffic congestion and noise. Public transport providers need to find ways to dilute the effects of immoderate use of private cars in big cities while maintaining a sufficient level of customer satisfaction. This study aimed to identify the key service quality (SQ) factors that drive passenger satisfaction in Istanbul’s rail transit (RT) system using data obtained from an extensive survey conducted by the Istanbul Public Transportation Co. A total of 11,116 passengers who used rail transport from May 15–June 3, 2012 ...


Community-Engaged Operations Research: Trends, New Frontiers And Opportunities, Michael P. Johnson Jr. Feb 2017

Community-Engaged Operations Research: Trends, New Frontiers And Opportunities, Michael P. Johnson Jr.

Michael P. Johnson

Scholars in multiple disciplines intersecting operations research have developed theory and applications to address the question, how can the decision sciences develop new ways to solve problems of special interest to organizations and individuals situated in geographically, economically and socially circumscribed communities? The motivation for this work is the belief that mission-driven and resource-constrained nonprofit organizations, and underrepresented, underserved, or vulnerable populations may have special needs for analytic and empirical problem-solving methods that have traditionally received less emphasis in traditional operations research and management science research and teaching. Scholarship in this area, alternatively labeled ‘community operational research’ (mostly in the ...


Dynamic Repositioning To Reduce Lost Demand In Bike Sharing Systems, Supriyo Ghosh, Pradeep Varakantham, Yossiri Adulyasak, Patrick Jaillet Feb 2017

Dynamic Repositioning To Reduce Lost Demand In Bike Sharing Systems, Supriyo Ghosh, Pradeep Varakantham, Yossiri Adulyasak, Patrick Jaillet

Research Collection School Of Information Systems

Bike Sharing Systems (BSSs) are widely adopted in major cities of the world due to concerns associated with extensive private vehicle usage, namely, increased carbon emissions, traffic congestion and usage of nonrenewable resources. In a BSS, base stations are strategically placed throughout a city and each station is stocked with a pre-determined number of bikes at the beginning of the day. Customers hire the bikes from one station and return them at another station. Due to unpredictable movements of customers hiring bikes, there is either congestion (more than required) or starvation (fewer than required) of bikes at base stations. Existing ...


The Long Term Effects Of An Aging Fleet On Operational Availability And Cost: Evidence From The Us Coast Guard, Christopher W. Lavin, Robert M. Mcnab, Ryan S. Sullivan Jan 2017

The Long Term Effects Of An Aging Fleet On Operational Availability And Cost: Evidence From The Us Coast Guard, Christopher W. Lavin, Robert M. Mcnab, Ryan S. Sullivan

Economics Faculty Publications

This paper empirically examines whether the aging of a fleet affects operational availability and operating cost using a unique data-set on the 117 47-foot Motor Lifeboats (MLBs) of the United States Coast Guard (USCG). Procured from 1997 to 2003, the 47-foot MLB is the standard lifeboat of the USCG and all 117 MLBs remain in service. The aging of the MLB fleet has resulted in higher annual operating costs and lower operational availability, although the nature of this relationship remains unclear. Our estimation strategy utilizes an error components estimator to examine these issues. We employ three variants of the dependent ...


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 ...


Analysis Of Six Monthly Distribution System For Food Grains In The Public Distribution System Of Punjab, India: A Beneficiary's Perspective, Abhay Kumar Grover Jan 2017

Analysis Of Six Monthly Distribution System For Food Grains In The Public Distribution System Of Punjab, India: A Beneficiary's Perspective, Abhay Kumar Grover

Graduate Theses and Dissertations

Public distribution system is a food security program in India providing safety net for the below poverty line citizens of the country. Its objective is to feed the most vulnerable population by providing subsidized food grains and other essential commodities on a monthly basis through its integrated network of supply chain. But the system is affected by various inefficiencies and malpractices. To improve the efficacy of the system, the state of Punjab introduced the new atta-daal (wheat pulses) scheme. One of the features of the scheme was to distribute grains to the beneficiaries on a six monthly basis (semi-annually) instead ...


Traffic Simulation Model For Port Planning And Congestion Prevention, Baoxiang Li, Kar Way Tan, Trong Khiem Tran Dec 2016

Traffic Simulation Model For Port Planning And Congestion Prevention, Baoxiang Li, Kar Way Tan, Trong Khiem Tran

Research Collection School Of Information Systems

Effective management of land-side transportation provides the competitive advantage to port terminal operators in improving services and efficient use of limited space in an urban port. We present a hybrid simulation model that combines traffic-flow modeling and discrete-event simulation for land-side port planning and evaluation of traffic conditions for a number of what-if scenarios. We design our model based on a real-world case of a bulk cargo port. The problem is interesting due to complexity of heterogeneous closed-looped internal vehicles and external vehicles traveling in spaces with very limited traffic regulation (no traffic lights, no traffic wardens) and the traffic ...


Measuring Success: Community Analytics For Local Economic Development, Michael P. Johnson Jr., Sandeep Jani Nov 2016

Measuring Success: Community Analytics For Local Economic Development, Michael P. Johnson Jr., Sandeep Jani

Michael P. Johnson

Main Street organizations develop local development initiatives that support economic and social goals. We describe an application of value-focused thinking and community-based operations research to identify economic development performance metrics and decision alternatives for local development interventions. Using interviews with stakeholders in three Boston communities, we show how values structures vary across communities and stakeholder groups and how attributes can be quantified using a variety of data sources. We conclude by presenting a composite values structure to support improved operations management and strategy design for all Boston Main Street districts.


An Agenda For Diversity And Inclusion-Related Research Within Or/Ms/Analytics, Michael P. Johnson Jr., George Chichirau Nov 2016

An Agenda For Diversity And Inclusion-Related Research Within Or/Ms/Analytics, Michael P. Johnson Jr., George Chichirau

Michael P. Johnson

Diversity and inclusion have been widely studied and debated, most often within the social sciences. What contributions can operations research, management science and analytics make to this domain of inquiry? This talk will critically examine assumptions and practices within the decision sciences that may support as well impede diversity- and inclusion-related research, and propose a research agenda that can challenge yet enrich our profession.


Measuring Success: Community Analytics For Local Economic Development, Michael P. Johnson Jr., Sandeep Jani Sep 2016

Measuring Success: Community Analytics For Local Economic Development, Michael P. Johnson Jr., Sandeep Jani

Michael P. Johnson

Main Street organizations are community-based nonprofits across the USA dedicated to local economic development through physical improvements, technical assistance to businesses, marketing and placebuilding. In this paper we identify metrics associated with success in local economic development and generate decision opportunities for improved program design and implementation. Our community partners, Main Street organizations in the city of Boston, want to ensure that data they collect about their service areas can help them measure progress towards achieving their individual goals as well as identify programs and initiatives that make best use of their resources and expertise. Using a mixed methods, inductive ...


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 ...


Profit Based Simulation Model For The Rail Transportation Industry, Mark Patrick Doran Aug 2016

Profit Based Simulation Model For The Rail Transportation Industry, Mark Patrick Doran

Engineering Management & Systems Engineering Theses & Dissertations

Schedules often conflict in the rail transportation industry. Operations managers assign resources and make scheduling decisions with no visibility of the revenue, cost, and profitability characteristics of the route they are manipulating. Transit speed decisions focus on ensuring trains safely reach their destination on time with little regard given to the actual service needs of the customer. Although all customers want on-time deliveries, few actually pay a premium to garner this level of preferential treatment. Operating in this type of environment results in decisions that severely erode profits.

In this dissertation, a simulation model referred to as the Rail Profit ...


Community-Based Operations Research: Data Analytics And Decision Modeling For Community Development And Social Change, Michael P. Johnson Jr. Mar 2016

Community-Based Operations Research: Data Analytics And Decision Modeling For Community Development And Social Change, Michael P. Johnson Jr.

Michael P. Johnson

‘Community-based operations research’ is an extension of multiple traditions in OR/MS to produce research for local change. CBOR attempts to incorporate critical thinking, evidence-based policy design and prescriptive decision modeling. This presentation introduces a theory of CBOR and reviews current applications to support a collection of new scholarship. These applications include foreclosure response, vacant land management and local economic development. We conclude with suggestions to expand the field of CBOR.


How Can Value Elicitation In Adult Basic Education Support Learners’ Success In Goal-Setting Policy?, Alma H. Biba, Michael P. Johnson Jr. Feb 2016

How Can Value Elicitation In Adult Basic Education Support Learners’ Success In Goal-Setting Policy?, Alma H. Biba, Michael P. Johnson Jr.

Michael P. Johnson

For the last two decades, federal legislation and Massachusetts’ state ABE policies have linked adult learners’ educational outcomes to accountability requirements. Using a multi-method approach ABE learners’ goal setting was presented as a decision problem in order to reveal and disentangle the conflicting preferences fueled by outcome-based accountability requirements. Elicitation of values using value-focused thinking (VFT) methodology revealed that learner’s self-defined goals are consistently distinct from program-defined goals, that teachers recognize this disjunction, and that efforts to reconcile the two could yield significant improvements in ABE program outcomes.


Smart Engagement: Planning And Decision-Making In Distressed Urban Neighborhoods, Justin Hollander, Michael P. Johnson Jr., Eliza D. Whiteman Dec 2015

Smart Engagement: Planning And Decision-Making In Distressed Urban Neighborhoods, Justin Hollander, Michael P. Johnson Jr., Eliza D. Whiteman

Michael P. Johnson

This book addresses the challenges and opportunities associated with the use of decision science and information technologies to help stabilize and revitalize distressed urban communities in the United States.

While cities in the U.S. grow and decline at various rates and for different underlying reasons, neighborhoods within cities that have faced sustained demographic and socio-economic challenges over time may have multiple factors in common, such as physical blight, widespread vacancies, underserved and marginalized populations and, in some cases, local markets that do not respond to traditional economic development strategies. These distressed communities are often indicative of high levels of ...


Course Syllabus: Ppol-G 742 Community-Based Operations Research, Michael P. Johnson Jr. Dec 2015

Course Syllabus: Ppol-G 742 Community-Based Operations Research, Michael P. Johnson Jr.

Michael P. Johnson

This elective course in the Public Policy PhD program provides an introduction to a wide range of decision models, methods and applications that help practitioners and researchers better understand how to represent common services and systems, and how to design practical solutions that can help people and organizations do their jobs better. Examples of public sector applications we will address include: emergency and post-disaster planning, human services, energy and natural resources and housing and community development. This course emphasizes special challenges in community-based public-sector decision-making. Communities of interest may be defined by geography, population, or a particular type of service ...


Community-Engaged Decision Modeling For Local Economic Development, Michael P. Johnson Jr., Sandeep Jani Nov 2015

Community-Engaged Decision Modeling For Local Economic Development, Michael P. Johnson Jr., Sandeep Jani

Michael P. Johnson

This presentation contains current results from a research project to identify success metrics and decision opportunities for Boston Main Streets organizations. It represents an application of qualitative decision analytic methods for values and objectives design


Introducing The Concept Of Resilience Into Maritime Safety, Jens-Uwe Schröder-Hinrichs Phd, Gesa Praetorius, Armando Graziano, Aditi Kataria, Michael Baldauf Oct 2015

Introducing The Concept Of Resilience Into Maritime Safety, Jens-Uwe Schröder-Hinrichs Phd, Gesa Praetorius, Armando Graziano, Aditi Kataria, Michael Baldauf

Michael Baldauf

The maritime industry is still characterized by prescriptive standards and reactive approaches in relation to safety and risk management to a large extent. For a very long time, responses to maritime accidents have been in terms of automation, regulation and training. While this as such is not wrong, it does not offer the full potential that concepts of resilience seem to suggest. The typical question that is predominately asked is still why things go wrong when accidents occur and search for causes and explanations is undertaken. An evaluation of the safety level achieved system and a focus on system components ...


Introducing The Concept Of Resilience Into Maritime Safety, Jens-Uwe Schröder-Hinrichs Phd, Gesa Praetorius, Armando Graziano, Aditi Kataria, Michael Baldauf Oct 2015

Introducing The Concept Of Resilience Into Maritime Safety, Jens-Uwe Schröder-Hinrichs Phd, Gesa Praetorius, Armando Graziano, Aditi Kataria, Michael Baldauf

Gesa Praetorius

The maritime industry is still characterized by prescriptive standards and reactive approaches in relation to safety and risk management to a large extent. For a very long time, responses to maritime accidents have been in terms of automation, regulation and training. While this as such is not wrong, it does not offer the full potential that concepts of resilience seem to suggest. The typical question that is predominately asked is still why things go wrong when accidents occur and search for causes and explanations is undertaken. An evaluation of the safety level achieved system and a focus on system components ...


From Human Reliability To Resilience & System Performance - Adapting To A Changing World, Gesa Praetorius, Fulko C. Van Westrenen Oct 2015

From Human Reliability To Resilience & System Performance - Adapting To A Changing World, Gesa Praetorius, Fulko C. Van Westrenen

Gesa Praetorius

Presentation given at the IALA Human Factors in VTS workshop, 11 October 2015, Gothenburg, Sweden.


Decision Science For Housing And Community Development: Localized And Evidence‐Based Responses To Distressed Housing And Blighted Communities: Wiley Interview, Michael P. Johnson Jr., Jeffrey Keisler, Senay Solak, David A. Turcotte, Armagan Bayram, Rachel B. Drew Oct 2015

Decision Science For Housing And Community Development: Localized And Evidence‐Based Responses To Distressed Housing And Blighted Communities: Wiley Interview, Michael P. Johnson Jr., Jeffrey Keisler, Senay Solak, David A. Turcotte, Armagan Bayram, Rachel B. Drew

Michael P. Johnson

This is an interview with staff at John Wiley & Sons regarding my book "Decision Science for Housing and Community Development: Localized and Evidence‐Based Responses to Distressed Housing and Blighted Communities" that was published by Wiley in 2015. It describes the motivation for the book, essential knowledge my co-authors and I would like each reader to take away from the book, and our assessment of the book's contribution to research and practice.


Examining The Relationship Between Leadership Decision Making Styles And Personality Type Within The Department Of Defense, Antoine Lamont Prince Sr. Oct 2015

Examining The Relationship Between Leadership Decision Making Styles And Personality Type Within The Department Of Defense, Antoine Lamont Prince Sr.

Engineering Management & Systems Engineering Theses & Dissertations

Leadership is perhaps the single most important function within the Department of Defense. While the old cliché “everyone is a leader regardless of position” may hold moral meaning, personnel in leadership positions are key. Under the umbrella of leadership is decision making. What leadership is to an organization, decision making is to leadership. Yet, despite this knowledge, unsound decisions are readily conducted. There are various theories as to why this holds true, one of which is personality type. Research however, shows that there is a limited amount of relevant knowledge to determine if there is in fact a significant statistical ...


Decision Science For Housing And Community Development: Localized And Evidence‐Based Responses To Distressed Housing And Blighted Communities, Michael P. Johnson Jr., Jeffrey Keisler, Senay Solak, David Turcotte, Armagan Bayram, Rachel B. Drew Sep 2015

Decision Science For Housing And Community Development: Localized And Evidence‐Based Responses To Distressed Housing And Blighted Communities, Michael P. Johnson Jr., Jeffrey Keisler, Senay Solak, David Turcotte, Armagan Bayram, Rachel B. Drew

Michael P. Johnson

This book presents decision models and applications to an important contemporary issue in urban housing and community development: local responses to the foreclosure crisis. The roots of this book are a National Science Foundation-funded project as well as an antecedent pilot project that served as a response to a phenomenon with multiple causes and large-scale and wide-ranging impacts on people, communities and markets worldwide, including in urbanized areas of the United States. The book demonstrates that a diverse set of decision models, developed to respond to the recent foreclosure crisis in the US, can contribute to emerging scholarship in public-sector ...


Designing Bus Transit Services For Routine Crowd Situations At Large Event Venues, Jianli Du, Shih-Fen Cheng, Hoong Chuin Lau Sep 2015

Designing Bus Transit Services For Routine Crowd Situations At Large Event Venues, Jianli Du, Shih-Fen Cheng, Hoong Chuin Lau

Research Collection School Of Information Systems

We are concerned with the routine crowd management problem after a major event at a known venue. Without properly design complementary transport services, such sudden crowd build-ups will overwhelm the existing infrastructure. In this paper, we introduce a novel flow-rate based model to model the dynamic movement of passengers over the transportation flow network. Based on this basic model, an integer linear programming model is proposed to solve the bus transit problem permanently. We validate our model against a real scenario in Singapore, where a newly constructed mega-stadium hosts various large events regularly. The results show that the proposed approach ...


A Rolling Horizon Auction Mechanism And Virtual Pricing Of Shipping Capacity For Urban Consolidation Centers, Chen Wang, Hoong Chuin Lau, Yun Fong Lim Sep 2015

A Rolling Horizon Auction Mechanism And Virtual Pricing Of Shipping Capacity For Urban Consolidation Centers, Chen Wang, Hoong Chuin Lau, Yun Fong Lim

Research Collection School Of Information Systems

A number of cities around the world have adopted urban consolidation centers (UCCs) to address challenges of last-mile deliveries. At the UCC, goods are consolidated based on their destinations prior to their deliveries into city centers. Typically, a UCC owns a fleet of ecofriendly vehicles to carry out such deliveries. Shippers/carriers that make use of the UCC’s service hence no longer need to be restricted by timewindow and vehicle-type regulations. As a result, they retain the ability to deploy large trucks for the economies of scale from the source to the UCC which is located outside the city ...


Cyclades – Crew-Centered Design And Operation Of Ships And Ship Systems For Safer Maritime Operations, Gesa Praetorius Aug 2015

Cyclades – Crew-Centered Design And Operation Of Ships And Ship Systems For Safer Maritime Operations, Gesa Praetorius

Gesa Praetorius

Presentation given at "Maritim Sikkerhed – Sunhed og Miljø" in Nyborg, 27 August 2015.