Operations and Supply Chain Management Commons^™

The Product Test Scheduling Problem, Megan Wydick Martin, Cliff Ragsdale, John Fico, Carlos G. Cajica-Sierra, Richard M. Fetcenko

International Journal of Applied Management and Technology

This research focused on product test scheduling in the presence of in-process and at-completion inspection constraints. Such testing arises in the context of the manufacture of products that must perform reliably in extreme environmental conditions. Often, these products must receive a certification from prescribed regulatory agencies at the successful completion of a predetermined series of tests. Operational efficiency is enhanced by determining the optimal order and start times of tests so as to minimize the makespan while ensuring that technicians are available when needed to complete in-process and at-completion inspections. We refer to this as the product test scheduling problem. …

Invited Perspective - Nutritional Needs And Implications For Children In Subsistence Marketplaces, Nagendra Rangavajla

Subsistence Marketplaces

Today, while the number of stunted children is decreasing in all geographies, the progress is not consistent. Moreover, there is an increasing prevalence of overweight and obesity among children and adolescent. Globally, about half of all children under five do not receive essential nutrients, often unnoticed until too late. On the other end of the spectrum, the incidence of overweight and obesity in 5-19 year old has increased from 4% in 1975 to 18% in 2016 ¹. These trends reflect a ‘triple burden of malnutrition’, a burden that impacts the survival, growth, and development of children, and in turn, …

How Incidents Impact Congestion On Roadways: A Queuing Network Approach, Pedro Cesar Lopes Gerum, Melike Baykal-Gursoy

Supply Chain Management

Motivated by the need for transportation infrastructure and incident management planning, we study traffic density under non-recurrent congestion. This paper provides an analytical solution approximating the stationary distribution of traffic density in roadways where deterioration of service occurs unpredictably. The proposed solution generalizes a queuing model discussed in the literature to long segments that are not space-homogeneous. We compare single and tandem queuing approaches to segments of different lengths and verify whether each model is appropriate. A single-queue approach works sufficiently well in segments with similar traffic behavior across space. In contrast, a tandem-queue approach more appropriately describes the density …

Zachary Shane's Portfolio, Zachary Shane

Honors College Portfolios

Description:

Being a part of the business program here at Duquesne University is more than just an accomplishment; it is the success I have received from high school to where I am today. Going into the junior year of my undergraduate program is where I intend to put all of these successes into place. I can finally dive into what I came to this school for, which was my ultimate major. As a supply chain and information technology double major, I can look into how our country is brought together and what pieces of technology are used to make that …

Chapter 9: Building An Iron-Clad Supplier Diversity Program, Quinton L. Marks, Abeni El-Amin Ph.D.

Management Faculty Publications

There are critical issues identified with reconciling parity in supplier diversity initiatives. Supplier diversity programs (SDP) are an instrument utilized to facilitate the process. This endeavor analyzes the best techniques to develop diversity, equity, inclusion, and belonging (DEIB) strategy to develop manufacturing suppliers. Moreover, quality control frameworks for developing supplier diversity programs in manufacturing necessitates strategic planning, which is necessary to support supplier diversity initiatives. For instance, questions that supplier diversity managers must ask include, Does the company have an existing minority supplier program? If so, what are its pros, cons, and evaluative measures? If not, why hasn’t there been …

On The Feasibility Of Speed Limits In Ocean Container Shipping, Manwo Ng

Information Technology & Decision Sciences Faculty Publications

The maritime industry is witnessing an increasingly loud call to contribute to the global trend towards environmental sustainability and decarbonization. One possible policy measure is the use of speed limits to reduce harmful emissions from ocean shipping. While the idea of slowing down ships to obey speed limits might seem intuitive, one key distinguishing characteristic of container shipping is that it is designed to adhere to a fixed, typically weekly, sailing schedule. This paper contributes to the literature investigating the feasibility of speed limits by demonstrating that speed limits are not always feasible in container shipping because of the rigid …

Impact Of Ceo Overconfidence On Corporate Financing Decision With Mediating Role Of Risk Perception, Amina Batool, Tahira Awan, Sumayya Chughtai

Business Review

The purpose of this paper is to investigate the impact of managerial (Chief Executive Officer) overconfidence on corporate financing decision with the mediating role of risk perception. This study indicates that psychological factors and biases affect the decision making of human beings including top management. The research design of this research work is causal and primary data has been used to test the results of this study. Among all the companies listed on Pakistan Stock Exchange, researchers have selected top executives of 200 companies as a sample. E-Questionnaire has been used to collect the required data through LinkedIn and other …

อิทธิพลของฤดูกาลต่ออุปสงค์ของเครื่องปรับอากาศ : กรณีศึกษา บริษัท Abc, อติญา วงศ์แก้ว

Chulalongkorn University Theses and Dissertations (Chula ETD)

การวิจัยนี้มีวัตถุประสงค์ คือ ศึกษาผลของฤดูกาลในการขายต่อปริมาณจำหน่ายเครื่องปรับอากาศ และศึกษา และประเมินวิธีพยากรณ์ที่เหมาะสมในการพยากรณ์ความต้องการสินค้าเครื่องปรับอากาศภายใต้ผลของฤดูกาล โดยข้อมูลที่นำมาศึกษา คือ ปริมาณยอดขายสินค้าที่ร้านค้าขายให้กับผู้บริโภค (Sell-out) เนื่องจากผู้วิจัยต้องการศึกษาพฤติกรรมของผู้บริโภคที่เกิดขึ้นจริงของเครื่องปรับอากาศใน 5 รายการสินค้า ตั้งแต่เดือนมกราคม 2014 จนถึงเดือนธันวาคม 2018 โดยแบ่งเป็น 2 ชุดข้อมูล คือ ชุดข้อมูลที่ 1 ปริมาณยอดขายสินค้าย้อนหลังตั้งแต่เดือนมกราคม 2014 จนถึงเดือนธันวาคม 2017 ชุดข้อมูลที่ 2 ปริมาณยอดขายสินค้าย้อนหลังตั้งแต่เดือนมกราคมจนถึงเดือนธันวาคม 2018 เพื่อใช้ในการเลือกเทคนิคการพยากรณ์ที่เหมาะสมสำหรับแต่ละรายการ โดยเปรียบเทียบการพยากรณ์ในรูปแบบแนวโน้มฤดูกาลแบบบวก และรูปแบบแนวโน้มฤดูกาลแบบคูณ

Exploring Blockchain Adoption Supply Chains: Opportunities And Challenges, Adrian V. Gheorghe, Omer F. Keskin, Farinaz Sabz Ali Pour

Engineering Management & Systems Engineering Faculty Publications

In modern supply chains, acquisition often occurs with the involvement of a network of organizations. The resilience, efficiency, and effectiveness of supply networks are crucial for the viability of acquisition. Disruptions in the supply chain require adequate communication infrastructure to ensure resilience. However, supply networks do not have a shared information technology infrastructure that ensures effective communication. Therefore decision-makers seek new methodologies for supply chain management resilience. Blockchain technology offers new decentralization and service delegation methods that can transform supply chains and result in a more flexible, efficient, and effective supply chain. This report presents a framework for the application …

Exact Algorithms For Practical Instances Of The Railcar Loading Problem At Marine Container Terminals, Manwo Ng, Dung-Ying Lin

Information Technology & Decision Sciences Faculty Publications

With the growth in global trade and its environmental footprint, sustainable modes of freight movement are increasingly important in today’s globalized world. This study focuses on on-dock rail, where the rail terminal is located within the marine container terminal. On-dock rail has in recent years become an essential mode of transportation to move containers out of congested marine container terminals. This study contributes to the literature by presenting tailored exact solution algorithms for a recently proposed optimization model to optimize the loading of double-stack trains. In particular, a 3-stage solution framework is presented for the case when rail cars have …

What's In A Name? Public Perceptions Of Multi-Level Marketing, Robert A. Peterson, Jeffrey A. Peterson

Atlantic Marketing Journal

This paper presents the results of a nationwide survey of the American public’s general familiarity with, and perceptions of, multi-level marketing, direct selling, and social selling. Survey respondents were most familiar with direct selling; there was no substantive difference in familiarity with multi-level marketing and social selling. Respondents familiar with the three terms possessed perceptions of them that were significantly more positive than were the perceptions of respondents reporting not being familiar with the terms. Across all terms, male respondents reported being more familiar with, and more positively disposed toward, them than did female respondents. Respondents 55 years of age …

Improving Data Visualization Skills: A Curriculum Design, Daniel A. Asamoah

Management Information Systems Faculty Publications

It is unclear whether the data visualization skills possessed by data-centric practitioners reflect recent advances in computing systems and visual design principles, and their role in generating relevant and insightful output to support decision-making. In this study, the author presents a curriculum designed for teaching basic and advanced concepts in data visualization. The author used the survey method to examine whether respondents perceived the pedagogic approach to have enhanced their data visualization competence. The findings indicate preference for a hands- on pedagogic approach to learning data visualization as compared to an entirely theory-based approach. Furthermore, different components of the pedagogic …

ความนิยมมื้ออาหารของผู้โดยสารชาวไทย บนเที่ยวบินระหว่างประเทศไทยและประเทศญี่ปุ่น, ปวัน ป้อมจักรศิลป์

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้ถูกสร้างขึ้น เพื่อเป็นโครงการวิจัย ทำการศึกษาถึงปัจจัยที่ส่งผลต่อความนิยมอาหารของผู้โดยสารชาวไทยที่เดินทางบนเที่ยวบินในเส้นทางระหว่างประเทศไทยและประเทศญี่ปุ่น เนื่องจากเป็นเส้นทางที่ได้รับความนิยมในการเดินทางเป็นอย่างมาก รวมถึงปัญหาการไม่ได้รับอาหารตามที่ผู้โดยสารต้องการ ซึ่งส่งผลทั้งการสร้างความไม่พึงพอใจให้แก่ผู้โดยสสารและหากผู้โดยสารไม่รับประทานอาหารที่มีให้บริการ ย่อมสร้างขยะและของเสียจากอาหารขึ้นโดยไม่จำเป็นการศึกษานี้จึงมีเป้าประสงค์ในการสร้างความพึงพอใจและลดของเสียดังกล่าวไปพร้อมกัน โดยศึกษาจากกลุ่มตัวอย่างที่เคยเดินทางในเส้นทางบินนี้มาแล้ว ปัจจัยที่นำมาศึกษาเป็นปัจจัยทางประชากรศาสตร์ ที่ผู้โดยสารมักต้องให้แก่สายการบินในขั้นตอนการจองตั๋วโดยสาร ทั้งข้อมูลเพศ อายุ รวมถึงข้อมูลส่วนบุคคลที่อาจมีผลต่อการพิจารณา เช่น ข้อมูลช่วงรายได้ อาชีพของผู้เดินทางและเป้าหมายการเดินทาง ผู้วิจัยเริ่มจากการออกแบบสอบถามเกี่ยวกับข้อมูลส่วนบุคคล การยอมรับอาหารแต่ละประเภทและทัศนคติต่อการบริการอาหารบนเที่ยวบิน นำข้อมูลที่ได้มาวิเคราะห์ด้วยการวิเคราะห์ความถดถอยโลจิสติกส์ทวิ ตามอาหารแต่ละประเภทและการเลือกกลับมาใช้บริการ พบว่า ผู้โดยสารส่วนมากมีความชื่นชอบต่ออาหารประเภทปลาและกุ้งเป็นอย่างมากส่วนเนื้อวัว เนื้อหมูและเนื้อไก่ การยอมรับจะลดลงตามลำดับ ในด้านการเลือกกลับมาใช้บริการความคิดเห็นเรื่องการให้ความสำคัญกับอาหาร เป็นปัจจัยหลักที่ส่งผลให้ผู้โดยสารเลือกกลับมาใช้บริการ แต่ในทางกลับกัน การไม่ได้รับอาหารตามที่ตนต้องการกลับไม่ส่งผลต่อการกลับมาใช้บริการ

How A Supply Chain Stumble Changes A Company’S Policies And Progress 20 Years Later: A Case Study Of Gap Inc., Alexandra Futterman

CMC Senior Theses

Gap Inc. is the third-largest American retailer. Founded in 1969, Gap Inc. holds four brands, Gap, Banana Republic, Old Navy and Athleta. In the late 1990s and early 2000s Gap Inc. made headlines for child labor abuses along with many other large brands. After this negative attention, Gap Inc. began developing policies and practices to combat ethical supply chain issues. These policies included a Human Rights Policy, a Code of Vendor Conduct, working conditions standards, and even capacity building programs that boarded company reaches into communities they touch. In conjunction with the policies Gap Inc. has published several social responsibility …

Containing Compounding Container Congestion, Curtis Salinger

CMC Senior Theses

The Covid-19 pandemic caused major disruptions throughout the container shipping supply chain. Professor Dongping Song of Liverpool University wrote a paper discussing the logistical vulnerabilities in the supply chain, including the issue of congestion in ports. This paper examines the Port of Los Angeles from 2018-2021 as it relates to Song’s paper to see how its operations were impacted during the Covid-19 timeframe. It is found that labor shortages, chassis shortages, and change in trade behavior each contributed to the congestion. Unfortunately, the implemented policies were insufficient to bolster the port against sustained challenges and congestion continues to worsen.

How Technology Can Advance Port Operations And Address Supply Chain Disruptions, Kevin Dowgiewicz

Theses and Dissertations

Supply chain disruptions continue to be a significant challenge as the world economy recovers from the pandemic-related shutdowns that have strained global supply chains. Shocks challenge the adaptability and resilience of maritime ports. The reaction of automated container terminals to supply chain disruptions has renewed interest, given the dramatic scenes of ships anchored for weeks. In this dissertation, I provide a vision of how technology can enhance a port’s ability to anticipate and handle shocks by improving coordination, cooperation, and information exchange across port stakeholders. The vision will be helpful for academics and practitioners to perform research that advances theory …

Crisis Response In The Global Supply Chain Of The Fashion Industry, Caitlyn Arce

CMC Senior Theses

The fast fashion industry has developed a supply chain that optimizes profits by manufacturing garments from developing countries at extremely low costs. With consumer preferences pressuring brands to produce new cheap trends and products at rapid speed, the brunt of the costs is placed in countries where managers, suppliers, and governments turn a blind eye for the sake of economic stability and development. In moments of crisis, key players have chosen to respond in ways that reflect their priorities and incentives. Brands have reflected in their decision-making the influence of consumer demand and sensitivity to media through the risk of …

Optimization Of Lean And Agile Supply Chain Management Practices In The Aviation Industry, Constantine M. Koursaris, Valerie P. Denney

International Journal of Aviation, Aeronautics, and Aerospace

Organizations that provide products and/or services must be able to execute fast, adaptive supply and (fluctuating) demand practices. From producers to consumers, and every stakeholder involved throughout the supply chain network processes, a collaborative relationship promotes sharing information that is beneficial to all. This long-term relationship then flourishes and in return stimulates the growth, health, and stability of the supply chain. Understanding the organizational processes and requirements is a complex endeavor. However, with technological advances and with the right type of data collected, it is possible to optimize entire supply chain networks.

This research study, seeks to provide an insight …

Small And Micro Business Resources In The Post-Pandemic Period: A Perspective From Local Bridal Boutique Businesses In West Virginia, Ishtehar Sharif Swazan

Graduate Theses, Dissertations, and Problem Reports (ETD)

In widely dispersed small communities, local and regional businesses dominate West Virginia, an eastern state of the United States in the Appalachian Mountains where small and micro businesses constitute 98.9% of all businesses and contributes 49.1% of the state’s total employment. These businesses create jobs, help build a strong financial position for the state, and promote community-building and social activities. These businesses are unique as they sustain themselves while competing with national and regional retail chains and carving out a customer for themselves. However, the damage caused by the spread of Covid-19 is having a devastating effect on the small …

The Moderating Effect Of Solar Radiation On The Association Between Human Mobility And Covid-19 Infection In Europe, Wenyu Zhao, Yongjian Zhu, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon Cheong Ooi

Research Collection Lee Kong Chian School Of Business

The novel coronavirus disease 2019 (COVID-19) has caused a global pandemic. Some studies have suggested a negative association between sunlight intensity and COVID-19 infection, alluding to the belief that it might be safe to go out on sunny days. This paper examined whether solar radiation mitigated the association between human mobility and COVID-19 infection in Europe using a dynamic panel data model to investigate the effect of human mobility, solar radiation, and their interaction on COVID-19 infection. The results revealed that outgoing mobility was positively correlated and solar radiation was negatively correlated with COVID-19 infection at lag levels of 1, …