Open Access. Powered by Scholars. Published by Universities.®

Operations and Supply Chain Management Commons

Open Access. Powered by Scholars. Published by Universities.®

1,823 Full-Text Articles 2,344 Authors 427,055 Downloads 125 Institutions

All Articles in Operations and Supply Chain Management

Faceted Search

1,823 full-text articles. Page 3 of 66.

World Class Supply Chain 2019: Next Generation Ideas, Michael Haughton 2019 Wilfrid Laurier University

World Class Supply Chain 2019: Next Generation Ideas, Michael Haughton

Business Faculty Publications

Next Generation Ideas, being the theme for the Fourth Annual World Class Supply Chain Summit, reflected summit’s focus on understanding what is becoming and what will continue to be of increasingly of high priority for current and future supply chain professionals. The summit, which was held on May 8th, 2019 in Milton, Ontario, brought together invited executives, scholars, and students to present and carefully examine a range of emerging ideas that are worthy of the supply chain community’s interest. The diversity of such ideas (e.g., new technologies, geopolitical developments, and the role of supply chain analytics) necessitated ...


Demand Forecasting: An Open-Source Approach, Murtada Shubbar, Jared Smith 2019 Southern Methodist University

Demand Forecasting: An Open-Source Approach, Murtada Shubbar, Jared Smith

SMU Data Science Review

In this paper, we compare demand forecasting methods used by the supply chain department at Bilports to open-source forecasting methods. The design and implementation of the open-source forecasting system also attempts to use several external datasets such as consumer sentiment, housing permit starts, and weather to improve prediction quality. Additionally, the performance of the forecast is evaluated by the reduction of shipment lead times from China, the company’s primary vendor. The objective of our paper is to improve Bilports’s forecasting capabilities. The primary motivation of this paper is to increase forecasting accuracy and identify the weaknesses of the ...


Disruption Risk Mitigation In Supply Chains: The Risk Exposure Index Revisited, Sarah Yini GAO, David SIMCHI-LEVI, Chung-Piaw TEO, Zhenzhen YAN 2019 Singapore Management University

Disruption Risk Mitigation In Supply Chains: The Risk Exposure Index Revisited, Sarah Yini Gao, David Simchi-Levi, Chung-Piaw Teo, Zhenzhen Yan

Research Collection Lee Kong Chian School Of Business

Simchi-Levi et al. (2014, 2015a) proposed a novel approach using the Time-To-Recover (TTR) parameters to analyze the Risk Exposure Index (REI) of supply chains under disruption. This approach is able to capture the cascading effects of disruptions in the supply chains, albeit in simplified environments -- TTRs are deterministic, and at most one node in the supply chain can be disrupted. In this paper, we proposed a new method to integrate probabilistic assessment of disruption risks into the REI approach and measure supply chain resiliency by analyzing the Worst-case CVaR (WCVaR) of total lost sales under disruptions.We show that the ...


Comprehensive Poultry Supply Chain Model With Vertical And Horizontal Linkages: Implication Of Domestic And International Shocks, Hakan Unveren 2019 University of Arkansas, Fayetteville

Comprehensive Poultry Supply Chain Model With Vertical And Horizontal Linkages: Implication Of Domestic And International Shocks, Hakan Unveren

Theses and Dissertations

According to USDA FAS, in 2017, the US was the largest broiler-producing country with 18.696 million metric tons and the second largest exporter of broiler products with 3.075 million metric tons (Brazil is the largest exporter with 3.847 million metric tons). Thus, around 83% of US production is consumed domestically. According to USITC, chickens are the most important protein source in the US, and Americans consume more chicken per capita than any other country. However, while the broiler industry is a key segment of US agriculture, it is underserved by large-scale supply-chain and trade models.

In this ...


Crop Planning In Sustainable Agriculture: Dynamic Farmland Allocation In The Presence Of Crop Rotation Benefits, Onur BOYABATLI, Javad NASIRY, Yangfang Helen ZHOU 2019 Singapore Management University

Crop Planning In Sustainable Agriculture: Dynamic Farmland Allocation In The Presence Of Crop Rotation Benefits, Onur Boyabatli, Javad Nasiry, Yangfang Helen Zhou

Research Collection Lee Kong Chian School Of Business

This paper examines crop planning decision in sustainable agriculture---that is, how to allocate farmland among multiple crops in each growing season when the crops have rotation benefits across growing seasons. We consider a farmer who periodically allocates the farmland between two crops in the presence of revenue uncertainty where revenue is stochastically larger and farming cost is lower when a crop is grown on rotated farmland (where the other crop was grown in the previous season). We characterize the optimal dynamic farmland allocation policy and perform sensitivity analysis to investigate how revenue uncertainty of each crop affects the farmer's ...


Combating Child Labor: Incentives And Information Disclosure In Global Supply Chains, Soo-Haeng CHO, Xin FANG, Sridhar TAYUR, Ying XU 2019 Carnegie Mellon University

Combating Child Labor: Incentives And Information Disclosure In Global Supply Chains, Soo-Haeng Cho, Xin Fang, Sridhar Tayur, Ying Xu

Research Collection Lee Kong Chian School Of Business

Problem definition: We investigate multinational firms’ inspection and pricing strategies to address the challenges of combating child labor in global supply chains. We also examine how several factors (such as information disclosure, goodwill loss, inspection cost, external monitoring by nongovernmental organizations (NGOs), and penalty scheme) affect firms’ incentives to use different strategies to combat child labor. Academic/practical relevance: Nearly 200 million children are engaged in child labor, many in developing countries that are part of the supply base of global manufacturing networks. However, there has been little research on evaluating the impact of firms’ strategies and NGOs’ initiatives on ...


Performance Effects Of Supply Chain Integration: The Relative Impacts Of Two Competing National Culture Frameworks, Torsten Doering, Jurriaan de Jong, Nallan Suresh 2019 Daemen College

Performance Effects Of Supply Chain Integration: The Relative Impacts Of Two Competing National Culture Frameworks, Torsten Doering, Jurriaan De Jong, Nallan Suresh

Faculty Articles

The effects of supply chain integration on operational performance have been investigated in past research. However, this relationship has not been tested in the context of national culture, which forms the major objective of this study. Furthermore, a second objective is to identify the elements of national culture that have a significant moderating effect on this relationship. Following this line of inquiry, a third objective is to uniquely investigate the relative efficacy of the Hofstede and GLOBE national culture frameworks. Data from the fifth survey round of the Global Manufacturing Research Group (GMRG) from 1,017 manufacturing plants in 14 ...


Procesos Administrativos Y Contables Para La Fundación Dejando Huellas Mets, Diego Mauricio Cárdenas Diaz, Ivonne Alexandra Vargas Valderrama 2019 Universidad de La Salle, Bogotá

Procesos Administrativos Y Contables Para La Fundación Dejando Huellas Mets, Diego Mauricio Cárdenas Diaz, Ivonne Alexandra Vargas Valderrama

Contaduría Pública

El trabajo presentado a continuación permite identificar el seguimiento realizado a la Fundación Dejando Huellas METS, ubicada en la localidad 18 Rafael Uribe Uribe de la ciudad de Bogotá, en la cual se realizó un proceso de investigación y acompañamiento que permitió la recopilación de información primaria a través de visitas al entorno interno y externo de dicha institución. Por medio de entrevistas realizadas a la señora Marisol Rincón, en su calidad de fundadora y presidente, se logró identificar las limitantes de conocimiento sobre temas administrativos y contables, elementos necesarios para ejecutar procesos de planeación y seguimiento que permitiera un ...


Managing Wind-Based Electricity Generation In The Presence Of Storage And Transmission Capacity, Yangfang ZHOU, Alan SCHELLER-WOLF, Nicola SECOMANDI, Stephen SMITH 2019 Singapore Management University

Managing Wind-Based Electricity Generation In The Presence Of Storage And Transmission Capacity, Yangfang Zhou, Alan Scheller-Wolf, Nicola Secomandi, Stephen Smith

Research Collection Lee Kong Chian School Of Business

We investigate the management of a merchant wind energy farm co‐located with a grid‐level storage facility and connected to a market through a transmission line. We formulate this problem as a Markov decision process (MDP) with stochastic wind speed and electricity prices. Consistent with most deregulated electricity markets, our model allows these prices to be negative. As this feature makes it difficult to characterize any optimal policy of our MDP, we show the optimality of a stage‐ and partial‐state‐dependent‐threshold policy when prices can only be positive. We extend this structure when prices can also be ...


Knowledge Gap: Supply Chain Students And Employers, Kathryn Bules 2019 Western Michigan University

Knowledge Gap: Supply Chain Students And Employers, Kathryn Bules

Honors Theses

This thesis project aims to identify the gap(s) between supply chain students and employers for both the preparedness and relative importance of the critical job skills employers seek in graduating students. This research is relevant because students view college as an investment that will pay off through better job placement and higher pay upon graduation. The problem is that some employers feel students do not have the skills necessary to be successful on the job. While there has been extensive research regarding a skills gap in graduating students and common criteria employer’s use to rank these students, there ...


Humanitarian Logistics: Shipping Designs For The Post Disaster Cargo Surge, Nicholas L. Green 2019 Air Force Institute of Technology

Humanitarian Logistics: Shipping Designs For The Post Disaster Cargo Surge, Nicholas L. Green

Theses and Dissertations

In 2017 Hurricane Maria devastated Puerto Rico. The humanitarian aid community scrambled a response to support the 3.4 million people affected by the disaster. In response, thousands of shipping containers filled with supplies were sent to the island. Numerous reports surfaced regarding significant delays in receiving the shipments. This research reviews the historical account of cargo throughput into Puerto Rico following Maria. A computer simulation built in ARENA compares various what-if scenarios based on empirically collected data and interviews with FEMA, port authorities, and commercial cargo carriers to determine how the humanitarian supply chain could improve for future disaster ...


Applying The Multiple Multidimensional Knapsack Assignment Problem To A Cargo Allocation And Transportation Problem With Stochastic Demand, Jocelin S. Maus 2019 Air Force Institute of Technology

Applying The Multiple Multidimensional Knapsack Assignment Problem To A Cargo Allocation And Transportation Problem With Stochastic Demand, Jocelin S. Maus

Theses and Dissertations

The US military relies on airlift to not only deploy and sustain U.S. armed forces anywhere in the world but also to rapidly mobilize humanitarian efforts and supplies. Operations already impacted by the limited capacity of aircraft also fall prey to dynamic requirements and differing priorities of multiple global locations. A growing concern for the modern military budget is how to provide airlift functions expediently and economically while mitigating the costs of shortfalls and overages. Utilizing fiscal year 2017-2018 cargo data published by the 618th Air Operations Center and modeling this problem as a multiple multidimensional knapsack assignment problem ...


Predicting Failures Of The Brazilian Air Force Tucano Fleet Using Survival Analysis, Luciana Mesquita Monteiro 2019 Air Force Institute of Technology

Predicting Failures Of The Brazilian Air Force Tucano Fleet Using Survival Analysis, Luciana Mesquita Monteiro

Theses and Dissertations

During the life of an aircraft, several failures may occur causing unplanned maintenance and costs of parts, labor, transportation, lost opportunities, and operations, among others. The prediction of these events becomes especially difficult for new airframes, since they do not have many flight hours or enough data to observe failures. This study analyzes and model the time between failures (TBF) of the Brazilian Air Force T-27 Tucano fleet by applying various non-parametric, semi-parametric, and parametric statistical models, to the TBF, such as the descriptive statistics, Kaplan-Meier estimators, Cox proportional hazards models, with or without frailty, and survival regression models, with ...


Turbojet Range, Loiter, And Altitude Tradeoff Estimations In Efficient Modeling And Optimization Formulations, Lauren M. Bramblett 2019 Air Force Institute of Technology

Turbojet Range, Loiter, And Altitude Tradeoff Estimations In Efficient Modeling And Optimization Formulations, Lauren M. Bramblett

Theses and Dissertations

Identifying accurate tradeoffs between loiter time, range, and loiter altitude for jet aircraft are critical for mission planning, but current methods are cumbersome and time and labor intensive. This research introduces a new method for determining tradeoffs between loiter time, range, and loiter altitude for jet aircraft utilizing specific aircraft performance characteristics and the Bréguet range and endurance equations. Results from this new methodology are compared to the existing model used by the National Air and Space Intelligence Center for flight planning. This method is then extended and applied to several routing assignment problems, taking advantage of the incorporation of ...


Fuzzy Inference Systems For Risk Appraisal In Military Operational Planning, Curtis B. Nelson 2019 Air Force Institute of Technology

Fuzzy Inference Systems For Risk Appraisal In Military Operational Planning, Curtis B. Nelson

Theses and Dissertations

Advances in computing and mathematical techniques have given rise to increasingly complex models employed in the management of risk across numerous disciplines. While current military doctrine embraces sound practices for identifying, communicating, and mitigating risk, the complex nature of modern operational environments prevents the enumeration of risk factors and consequences necessary to leverage anything beyond rudimentary risk models. Efforts to model military operational risk in quantitative terms are stymied by the interaction of incomplete, inadequate, and unreliable knowledge. Specifically, it is evident that joint and inter-Service literature on risk are inconsistent, ill-defined, and prescribe imprecise approaches to codifying risk. Notably ...


Examining The Express Supportability Module: Implementing An Autoregressive Distributed Lag Approach With Air Force Maintenance Data, Troy J. St Peter 2019 Air Force Institute of Technology

Examining The Express Supportability Module: Implementing An Autoregressive Distributed Lag Approach With Air Force Maintenance Data, Troy J. St Peter

Theses and Dissertations

Launched in 1996, EXPRESS (Execution and Prioritization of Repairs Support System) is a program integral to the Air Force reparable supply chain. Daily, EXPRESS relies on a number of data sources and individual modules like the Supportability Module to determine which necessary repairs can and should be made. The Supportability Module examines the prioritized list of repairs and checks four constraints in order to decide whether each repair can be made given current resources. According to the logic of the module, a single constraint failure means that subsequent resource checks are not made before evaluating the next repair. Unfortunately, this ...


Simulating Maritime Chokepoint Disruption In The Global Food Supply, Ryan B. Walton 2019 Air Force Institute of Technology

Simulating Maritime Chokepoint Disruption In The Global Food Supply, Ryan B. Walton

Theses and Dissertations

The three food crops of wheat, maize, and rice make up almost two-thirds of the world's dietary energy needs. Of these three, just six countries provide 70% of the global supply. Furthermore, soybeans account for three-quarters of global livestock feed, and only three countries provide 80% of the global supply. Considering over half of the world's exported supply of these four commodities are exported via maritime means, the free ow of marine traffic becomes paramount. Current models lack the ability to capture the inherent variance displayed in the maritime transport system, which can lead to inaccurate assumptions about ...


Operations Research Methods For Multi-Domain Campaign Phase Planning, John A. Schlicht 2019 Air Force Institute of Technology

Operations Research Methods For Multi-Domain Campaign Phase Planning, John A. Schlicht

Theses and Dissertations

In "Antiaccess Warfare as Strategy," Tangredi posits the question and need to consider multiple domains and governmental and warfighting functions in various phases of campaign execution. Multi-domain integration within and across various phases of the joint campaign presents a host of non-linear factors that are compounded and amplified by uncertainties. Colonel Blotto is a simple game that is suited to compare traditional force-on-force military engagements where mass wins the day, but have had limited application to more complex military planning. This thesis explores the formulation schema, data-driven parameters, methods of calculation, and scenarios applicable to a generalized Colonel Blotto (General ...


Strategies To Reduce Employee Turnover In Clinical Logistics, Brenda Simon 2019 Walden University

Strategies To Reduce Employee Turnover In Clinical Logistics, Brenda Simon

Brenda Simon

Clinical supply chain managers who do not apply effective employee turnover strategies could negatively affect team performance, employee morale, employee well-being, patient outcomes, productivity, profitability, and the sustainability of organizational activities. The purpose of this multiple case study was to explore strategies that supply chain managers used to decrease employee turnover in clinical logistics organizations. The targeted population consisted of 6 clinical logistics supply chain managers working in 6 community hospitals located in Maryland with experience implementing successful strategies to decrease employee turnover. The servant leadership theory served as the study’s framework. Data collection included semistructured interviews and a ...


Corn, Soybeans Or Fallow: Dynamic Farmland Allocation Under Uncertainty, Onur BOYABATLI, Javad NASIRY, Yangfang (Helen) ZHOU 2019 Singapore Management University

Corn, Soybeans Or Fallow: Dynamic Farmland Allocation Under Uncertainty, Onur Boyabatli, Javad Nasiry, Yangfang (Helen) Zhou

Research Collection Lee Kong Chian School Of Business

This chapter develops a theoretical basis for understanding the trade-offs facing a farmer for allocating his farmland among several crops over multiple growing seasons. Specifically, we focus on the farmland allocation among two cash crops (corn and soybeans) and letting the farmland lay fallow to rejuvenate the soil and increase the revenue for the crop grown on this farmland in the subsequent seasons. In each growing period, the farmer chooses the allocation in the presence of revenue uncertainty for each cash crop, and crop rotation benefits across periods, where revenue is stochastically larger and farming cost is lower when a ...


Digital Commons powered by bepress