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Operations research

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Articles 1 - 30 of 31

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

Decision Science For Community Development And Social Change, Michael P. Johnson Jr. Feb 2019

Decision Science For Community Development And Social Change, Michael P. Johnson Jr.

Michael P. Johnson

Operations research, also known as management science or decision science, is a mathematics-based discipline that draws from engineering, information systems, management, public policy and planning. OR enables individuals and organizations to make better decisions regarding manufacturing and logistics, service provision and strategy design. My particular interest in OR focuses on the needs of mission-driven and resource-constrained organizations that serve urban communities. In my talk I will describe how OR can use qualitative and quantitative analysis through meaningful engagement of communities to enable creative identification, formulation and solution of complex problems for local impact and social justice. Specific applications I'm ...


Diversity And Or/Ms/Analytics: Deepening The Impact Of Our Research, Broadening Access To The Profession, Michael P. Johnson Jr. Dec 2018

Diversity And Or/Ms/Analytics: Deepening The Impact Of Our Research, Broadening Access To The Profession, Michael P. Johnson Jr.

Michael P. Johnson

In a society that is growing ever more diverse, and where perspectives, needs and priorities of traditionally-underrepresented groups are increasingly important to incorporate into our work and discourse, it is incumbent on the OR/MS/Analytics field to consider what diversity, equity and inclusion mean to us, our progress towards becoming a more diverse profession, and how our research, teaching and practice would look like if diversity, equity and inclusion were at the center of our work. The occasion of the publication of an Editor’s Cut volume on diversity, equity and inclusion is an opportunity to reflect on the ...


Socio-Economic Planning Sciences Special Issue: Indices For The Betterment Of The Public, Vincent Charles, Ali Emrouznejad, Michael P. Johnson Jr. Oct 2018

Socio-Economic Planning Sciences Special Issue: Indices For The Betterment Of The Public, Vincent Charles, Ali Emrouznejad, Michael P. Johnson Jr.

Michael P. Johnson

Over the years, the quest for a better society has led to the birth of a variety of composite indices of development, from the gross domestic product to the happiness index. These indices usually integrate various social, cultural, psychological, and political aspects and are considered of vital importance for evaluating a country's level of development and for assessing the impact of policy specially in public sector. Overall, they consist of numerical measures that describe the well-being of both the individual and the society as a whole. 

The Special Issue of Socio-Economic Planning Sciences encourages original research articles of high ...


Strengthening The Profession Through Diversity And Inclusion-Related Research Within Or, Michael P. Johnson Jr. Oct 2018

Strengthening The Profession Through Diversity And Inclusion-Related Research Within Or, Michael P. Johnson Jr.

Michael P. Johnson

Diversity, equity and inclusion are well-studied and widely-practiced areas in organization design, human resources and many areas of social sciences. However, the science, technology, engineering and math (STEM) disciplines are somewhat newer to the notion of diversity, equity and inclusion as a way to improve professions and contribute to substantive research within component disciplines. This is especially true for operations research and the decision sciences. In this talk, given to an interdisciplinary audience of engineering professors, administrators and students, I provide an introduction to operations research, to diversity, equity and inclusion within STEM and OR specifically, ways that DEI might ...


Developing Optimization Techniques For Logistical Tendering Using Reverse Combinatorial Auctions, Jennifer Kiser Aug 2018

Developing Optimization Techniques For Logistical Tendering Using Reverse Combinatorial Auctions, Jennifer Kiser

Electronic Theses and Dissertations

In business-to-business logistical sourcing events, companies regularly use a bidding process known as tendering in the procurement of transportation services from third-party providers. Usually in the form of an auction involving a single buyer and one or more sellers, the buyer must make decisions regarding with which suppliers to partner and how to distribute the transportation lanes and volume among its suppliers; this is equivalent to solving the optimization problem commonly referred to as the Winner Determination Problem. In order to take into account the complexities inherent to the procurement problem, such as considering a supplier’s network, economies of ...


Strengthening The Profession Through Diversity, Inclusion And Equity: Best Practices And Distinguished Practitioners, Michael P. Johnson Jr. Oct 2017

Strengthening The Profession Through Diversity, Inclusion And Equity: Best Practices And Distinguished Practitioners, Michael P. Johnson Jr.

Michael P. Johnson

This session will introduce INFORMS conference participants to the mission and goals of the diversity, inclusion and equity committee. Panelists will describe the state of diversity and inclusion at INFORMS and other professional societies; at organizations whose employees and members participate in INFORMS and other professional societies; and the community of practice associated with operations research, management science and analytics, other STEM fields and related disciplines. Speakers and audience members will explore values, strategies and tactics that may enable INFORMS members of diverse backgrounds and experiences to achieve professional success, and that may enable organizations to produce greater social impact ...


Optimizing Student Workforce Scheduling At Psu Office Of Information Technology (Oit), Agam Ebramsyah, Aishwarya Joy, Cody Miller, Jake Stevens, Priyanka Patil Oct 2017

Optimizing Student Workforce Scheduling At Psu Office Of Information Technology (Oit), Agam Ebramsyah, Aishwarya Joy, Cody Miller, Jake Stevens, Priyanka Patil

Engineering and Technology Management Student Projects

A significant challenge for businesses of any size, is generating a work schedule that ensures adequate personnel coverage to ensure all aspects of the business are properly staffed, while preventing waste produced from having an excess number of employees working at a given time. The decision to manually create spreadsheets and work schedules that take into account availability, staffing requirements, and cost efficiency can become overwhelming and labor intensive. For Portland State University's Office of Information Technology (OIT), there is a significant challenge in scheduling student workers, while ensuring staffing requirements are met, student work hour restrictions are observed ...


Organics To You - Optimization Of Produce Bins, Rassaniya Lerdphayakkarat, Chuan Chieh Lu, Jon Roschke, Juliana Suzuki, Jessie Truong Oct 2017

Organics To You - Optimization Of Produce Bins, Rassaniya Lerdphayakkarat, Chuan Chieh Lu, Jon Roschke, Juliana Suzuki, Jessie Truong

Engineering and Technology Management Student Projects

Organics to You (www.organicstoyou.org ) is a produce delivery company that focuses on bringing organic local food from local farms straight to the homes, schools, and businesses of its clients. Each week a "Small Bin" is created using different varieties of local produce from various farms. Customers receive a bin that contains 12-14 varieties of produce with 2-6 "servings" of each variety (e.g., 1 melon, 4 apples, 1 head of lettuce, 2 lbs potatoes, etc).

Our objective is to optimize the contents of the “Small Bin”. The decision we want to make is how much of each variety ...


Aspect Identification And Sentiment Analysis In Text-Based Reviews, Sean Byrne Jan 2017

Aspect Identification And Sentiment Analysis In Text-Based Reviews, Sean Byrne

Theses and Dissertations

Online text-based reviews are often associated with only an aggregate numeric rating that does not account for nuances in the sentiment towards specific aspects of the review's subject. This thesis explores the problem of determining review scores for specific aspects of a review's subject. Specifically, we examine two important subtasks - aspect identification (identifying specific words and phrases that refer to aspects of the review subject) and aspect-based sentiment analysis (determining the sentiment of each aspect). We examine two different models, conditional random fields and an association mining algorithm, for performing aspect identification. We also develop a method for ...


Operations Research Applications In Multi-Allelic Trait Introgression In Plant Breeding, Ye Han Jan 2017

Operations Research Applications In Multi-Allelic Trait Introgression In Plant Breeding, Ye Han

Graduate Theses and Dissertations

Plant breeding has been defined as the art and science of producing desired characteristics through artificial selection. Practiced since the beginning of civilizations, plant breeders in the 20th Century made enormous changes to important agronomic traits. In the 21st Century, increasing demands for food, fiber, and energy with less water, land, fuel, and fertilizer will force plant breeding to become more efficient and effective. With the application of operations research, we frame the multi-allelic trait introgression project in plant breeding into an engineering system. We also discuss the major problems encountered and create new metrics or models to improve this ...


The Optimization Of Introgression Projects For Plant Genetic Improvement, John Nicholas Cameron Jan 2017

The Optimization Of Introgression Projects For Plant Genetic Improvement, John Nicholas Cameron

Graduate Theses and Dissertations

We approach the problem of trait introgression as an optimization challenge with clearly defined objectives in 3 different scenarios that largely capture the introgression problem in a diploid outcrossing selfing-tolerant species: 1) the introgression of a single allele into a recipient background via backcrossing, 2) the introgression of multiple alleles from one line into a recipient line, and 3) the introgression of several alleles from multiple lines into the background of a recipient line. For each of the 3 cases, we present a mathematical formulation, based on optimization principles from Operations Research (OR), defining the objectives to be optimized, decision ...


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.


Visualizing Complex Adaptive Systems: A Case Study Of The Missouri Maternal, Infant, And Early Childhood Home Visiting Program, Julie M. Kapp, Sara Schlemper, Riyad Haq, Sofia Campos Vidal Pires, Eduardo J. Simoes Oct 2016

Visualizing Complex Adaptive Systems: A Case Study Of The Missouri Maternal, Infant, And Early Childhood Home Visiting Program, Julie M. Kapp, Sara Schlemper, Riyad Haq, Sofia Campos Vidal Pires, Eduardo J. Simoes

Frontiers in Public Health Services and Systems Research

Background: The Maternal, Infant, and Early Childhood Home Visiting (MIECHV) program was created by the 2010 Patient Protection and Affordable Care Act. MIECHV provides comprehensive services to at-risk families through evidence-based home visiting programs.

Purpose: The following question is addressed: Does the Missouri MIECHV system meet the definition of a complex adaptive system (CAS)?

Methods: A systematic review was conducted of documents related to MIECHV programs (federal, state, and local levels), and to affiliated programs with a home visiting and early childhood (aged birth to 5 years) scope. The organizations’ fit was identified for the scope of early childhood home ...


A Tabu Search, Augment-Merge Heuristic To Solve The Stochastic Location Arc Routing Problem, Tiffany L. Yang May 2016

A Tabu Search, Augment-Merge Heuristic To Solve The Stochastic Location Arc Routing Problem, Tiffany L. Yang

Theses and Dissertations

The location arc routing problem (LARP) is a network optimization problem combining strategic facility location decisions and tactical or operational vehicle routing decisions for customer demand located on arcs of a network. The LARP seeks to locate facilities, or depots, and create vehicle delivery routes to minimize costs. The total cost is comprised of three components: fixed facility locations costs, fixed route creation (or vehicle acquisition) costs, and variable arc traversal costs. The applications of the LARP are varied and often include public services such as mail delivery, garbage collection, and street sweeping. In all of these applications, the magnitude ...


Developing An Optimal Model For Infant Home Visitation, Isaac Atuahene Aug 2015

Developing An Optimal Model For Infant Home Visitation, Isaac Atuahene

Doctoral Dissertations

The United States, Great Britain, Denmark, Canada and many other countries have accepted home visitation (HV) as a promising strategy for interventions for infants after births and for their mothers. Prior HV studies have focused on theoretical foundations, evaluations of programs, cost/benefit analysis and cost estimation by using hospital/payer/insurance data to prove its effectiveness and high cost. As governments and private organizations continue to fund HVs, it is an opportune time to develop and formulate operations research (OR) models of HV coverage, quality and cost so they might be used in program implementation as done for adult ...


Preventive Maintenance Decision Modeling In Health And Service Systems, Mahboubeh Madadi Jul 2015

Preventive Maintenance Decision Modeling In Health And Service Systems, Mahboubeh Madadi

Theses and Dissertations

This dissertation focuses on the preventive maintenance decision modeling in healthcare and service systems. In the first part of this dissertation, some issues in preventive health decisions for breast cancer are addressed, and in the second part, the required characteristics for preventive maintenance of an unreliable queuing system are derived.

Adherence to cancer screening is the first issue that is addressed in this dissertation. Women’s adherence or compliance with mammography screening remained low in the recent years. In this dissertation, we first develop a design-based logistic regression model to quantify the probability of adherence to screening schedules based on ...


Comparison Of Optimization Techniques In Large Scale Transportation Problems, Tapojit Kumar Aug 2014

Comparison Of Optimization Techniques In Large Scale Transportation Problems, Tapojit Kumar

Journal of Undergraduate Research at Minnesota State University, Mankato

The Transportation Problem is a classic Operations Research problem where the objective is to determine the schedule for transporting goods from source to destination in a way that minimizes the shipping cost while satisfying supply and demand constraints. Although it can be solved as a Linear Programming problem, other methods exist. Linear Programming makes use of the Simplex Method, an algorithm invented to solve a linear program by progressing from one extreme point of the feasible polyhedron to an adjacent one. The algorithm contains tactics like pricing and pivoting. For a Transportation Problem, a simplified version of the regular Simplex ...


Optimizing Boat Hull And Deck Mold Storage Scheduling With Linear Programming, Tron Bjorn Dareing Aug 2014

Optimizing Boat Hull And Deck Mold Storage Scheduling With Linear Programming, Tron Bjorn Dareing

Masters Theses

With a wide range of products, Sea Ray uses a vast amount of large boat molds for each of the different boat models. Storing and transporting these molds can be an issue with introducing high variability in the production process. One of the largest problems deals with the utilization of the employees’ time with the large amount of boat production. Having the boat molds being ready for production is a critical part of the manufacturing of quality boats. There is non-value added time spent on preparing the molds for the lamination process and storing them in various areas. This problem ...


Using Social Networking Game To Teach Operations Research And Management Science Fundamental Concepts, Ivan G. Guardiola, Susan L. Murray, Elizabeth A. Cudney Jun 2011

Using Social Networking Game To Teach Operations Research And Management Science Fundamental Concepts, Ivan G. Guardiola, Susan L. Murray, Elizabeth A. Cudney

Engineering Management and Systems Engineering Faculty Research & Creative Works

This paper presents our experience using the popular game FarmVille by Zynga® to teach the fundamentals of linear programming and integer programming concepts to undergraduate students in an introductory operations research course. FarmVille is a popular game within the social networking website Facebook®. A month-long contest was introduced amongst the students with the goal to be the best individual farmer by striving to reach high levels of revenue, experience, and aesthetic appeal of their own unique farm. The contest is to demonstrate the concepts of problem formulation, solution methods, multiple and competing objectives, implementation of policy, and reformulation. The students ...


Data Mining Framework For Batching Orders In Real-Time Warehouse Operations, Humberto Fuentes Saenz Jan 2011

Data Mining Framework For Batching Orders In Real-Time Warehouse Operations, Humberto Fuentes Saenz

Graduate Theses and Dissertations

Warehouse activities play a key role in the final customer service level. From the warehouse processes, order picking is the major contributor to this category overall expenses. Order batching is commonly employed to improve the resources efficiency. Several heuristics have been proposed for the order batching problem, most of them developed for static batching, although scarce research has been focused on dynamic batching via stochastic modeling.

We present an a novel approach to the problem developing a framework based on machine learning application directly to historical order batches data; gaining valuable knowledge regarding how are the batches formed and what ...


Hybrid Nested Partitions Method With Intelligent Greedy Search For Solving Weapon-Target Assignment Problem, Gunhyung Cho Jan 2009

Hybrid Nested Partitions Method With Intelligent Greedy Search For Solving Weapon-Target Assignment Problem, Gunhyung Cho

Graduate Theses and Dissertations

The Weapon-Target Assignment (WTA) problem is one of the most important problems of military applications of operations research. The objective of the WTA problem is to find proper assignments of weapons to targets which minimize the expected damage of defensive side. The WTA problem is known to be NP-complete. In this paper, hybrid Nested Partitions (NP) method is proposed to solve WTA problems. The proposed algorithm is named as "Hybrid NP method with intelligent greedy search". The NP method has been found to be very effective for solving complex large-scale discrete optimization problems. In addition to that, due to the ...


Details And Description Of Operations Research, Paul Savory Jan 2007

Details And Description Of Operations Research, Paul Savory

Industrial and Management Systems Engineering -- Reports

The ambiguous term operations research was coined during World War II. A frequent substitute is management science. Operations research is a scientific approach to analyzing problems and making decisions. It uses mathematics and mathematical modeling on computers to forecast the implications of various choices and zero in on the best alternatives. This content paper provides an overview of operations research. It highlights operations research problems, methods for solving problems, different areas of operations research, and example problems.


Freightliner Llc Manufacturing Optimization, Jerry Compton, Ryan Jefferis, Hasnah Mat-Amin, Felix Ngoussou Oct 2001

Freightliner Llc Manufacturing Optimization, Jerry Compton, Ryan Jefferis, Hasnah Mat-Amin, Felix Ngoussou

Engineering and Technology Management Student Projects

Freightliner LLC has been producing innovative products since 1942 for the trucking industry. Following a 1981 acquisition by Daimler-Benz AG, Freightliner has steadily gained market share through acquisition and fleet sales. Following record production in 1999 at maximum yield levels, year 2000 hit the heavy truck market especially hard. High diesel fuel prices, low used truck values, and a slowing economy were just a few reasons for reduced truck sales.

Through Ql of 2001, heavy vehicle production was down 54% compared to 2000 in attempts of lowering inventory amounts. In this new market, capacity is no longer the overall manufacturing ...


Engineering Management And Industrial Engineering: Six One Way, A Half Dozen The Other, Susan L. Murray, Stephen A. Raper Jan 1997

Engineering Management And Industrial Engineering: Six One Way, A Half Dozen The Other, Susan L. Murray, Stephen A. Raper

Engineering Management and Systems Engineering Faculty Research & Creative Works

To some people engineering management (EM) is a specialty within Industrial Engineering (IE), to others EM is broader than IE. Comparing the histories of the two disciplines shows a clear distinction. Both disciplines have their roots in the work of engineering pioneers at the turn of the century. Work in motion and time study, along with other efficiency driven techniques, was the beginning of IE. Both IE and EM can trace their roots to the era of scientific management and the work of the early pioneers. A noted change for IE occurred after World War II when many programs shifted ...


Computer Aided Parametric-Planning (Capp), Faramarz Rahbar Jan 1997

Computer Aided Parametric-Planning (Capp), Faramarz Rahbar

Retrospective Theses and Dissertations

Today's challenge of fast technological advances and global competition requires a shift in our planning paradigm. The "same old way" simply does not bring about the necessary results. Our paradigm must change to reflect this. Continuous improvement of the planning process is essential to achieve success. Research indicates that the key to project success is to invest quality time in systematic planning at an early stage. Yet, we have relied upon mostly unstructured and manual formation of plans. Existing scientific planning techniques (i.e. Critical Path Method) are scheduling tools for analysis rather than plan generation. They manipulate data ...


Applying Informal Cooperative Learning Groups Techniques In The Classroom, Susan L. Murray Jan 1996

Applying Informal Cooperative Learning Groups Techniques In The Classroom, Susan L. Murray

Engineering Management and Systems Engineering Faculty Research & Creative Works

The application of informal cooperative learning (CL) groups techniques in the courses including operation research, and computer simulation, is discussed. The informal CL activities can be accomplished in small groups consisting of two or three students. It increases student participation and revitalizing passive lecturers. Students work example problems or homework problems in groups.


A Genetic Algorithm Approach To Optimization Of Asynchronous Automatic Assembly Systems, Mark A. Wellman Jan 1991

A Genetic Algorithm Approach To Optimization Of Asynchronous Automatic Assembly Systems, Mark A. Wellman

Retrospective Theses and Dissertations

No abstract provided.


Computational Aspects Of Linear Multiple Objective Optimization , John Mark Trzeciak Jan 1976

Computational Aspects Of Linear Multiple Objective Optimization , John Mark Trzeciak

Retrospective Theses and Dissertations

No abstract provided.


A Study Of The Farm Management Process In Relation To Modern Operations Research Technology, Daniel Merry Castle Jan 1967

A Study Of The Farm Management Process In Relation To Modern Operations Research Technology, Daniel Merry Castle

Retrospective Theses and Dissertations

No abstract provided.


A Dynamic Transportation Subsystem Analysis For Optimizing A Material Handling System With Multiple Transfers , William Carrol Arnwine Jan 1967

A Dynamic Transportation Subsystem Analysis For Optimizing A Material Handling System With Multiple Transfers , William Carrol Arnwine

Retrospective Theses and Dissertations

No abstract provided.