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Operations and Supply Chain Management Commons™
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Articles 151 - 180 of 409
Full-Text Articles in Operations and Supply Chain Management
Inducing Compliance With Postmarket Studies For Drugs Under Fda's Accelerated Approval Pathway, Liang Xu, Hui Zhao, Nicholas C. Petruzzi
Inducing Compliance With Postmarket Studies For Drugs Under Fda's Accelerated Approval Pathway, Liang Xu, Hui Zhao, Nicholas C. Petruzzi
Research Collection Lee Kong Chian School Of Business
Problem definition: In 1992, the Food and Drug Administration (FDA) instituted the accelerated approval pathway (AP) to allow promising drugs to enter the market based on limited evidence of efficacy, thereby permitting manufacturers to verify true clinical benefits through postmarket studies. However, most postmarket studies have not been completed as promised. We address this noncompliance problem. Academic/practical relevance: The prevalence of this noncompliance problem poses considerable public health risk, thus compromising the original purpose of a well-intentioned AP initiative. We provide an internally consistent and implementable solution to the problem through a comprehensive analysis of the myriad complicating factors and …
A Two-Stage Parallel Network Dea Model For Analyzing The Operational Capability Of Container Terminals, Jaehun Park, Byung Kwon Lee, Joyce M. W. Low
A Two-Stage Parallel Network Dea Model For Analyzing The Operational Capability Of Container Terminals, Jaehun Park, Byung Kwon Lee, Joyce M. W. Low
Research Collection Lee Kong Chian School Of Business
This study proposes a systematical approach to evaluate the operational capability of container terminals and discusses the effect of resource usages on operational performances. Two inter-dependent processes (i.e. the loading-discharging (L&D) and the delivery-receiving (D&R) operational processes) with shared/non-shared resources and common/separate productions are examined and characterized as a two-stage parallel network. An evaluation model is developed upon the principles of data envelopment analysis (DEA) to assess the operational capability of the terminals. Using the real-world dataset of 9 container terminals at Port of Busan, comparative performance results are obtained for 5 years spanning across 2014–2018. The proposed model demonstrates …
Cooperative Approaches To Managing Social Responsibility In A Market With Externalities, Xin Fang, Soo-Haeng Cho
Cooperative Approaches To Managing Social Responsibility In A Market With Externalities, Xin Fang, Soo-Haeng Cho
Research Collection Lee Kong Chian School Of Business
Problem definition: This paper studies two cooperative approaches of firms in managing social responsibility violations of their supplier: auditing a common supplier jointly (joint auditing) and sharing independent audit results with other firms (audit sharing). We study this problem in a market with externalities and a large number of firms. Academic/practical relevance: With numerous firms procuring their materials and parts worldwide, there are many cases in which overseas suppliers violate safety, labor, or environmental standards. Those violations have externalities in the sense that one firm’s violation affects other firms in the same market. …
Capacity Allocation And Revenue Sharing In Healthcare Alliances, Xiaoquan Gao, Jianpei Wen, Jie Song
Capacity Allocation And Revenue Sharing In Healthcare Alliances, Xiaoquan Gao, Jianpei Wen, Jie Song
Research Collection Lee Kong Chian School Of Business
This study investigates the operations of a healthcare alliance, where two types of independent hospitals [general hospitals (GHs) and community healthcare centers (CHCs)] collaborate in capacity allocation and revenue management to improve efficiency and revenue. Specifically, the GH allocates part of its capacity to establish a dedicated green channel for referral patients from the CHC based on a negotiated revenue sharing scheme. Generally, independent hospitals, like GHs and CHCs, in the healthcare delivery system provide complementary and substitute services due to the referral process and patients choice. Both service providers need each other, and their collaboration is very beneficial to …
Covid-19 Impact On The Global Economy Beyond The Near Term, Madhur Jha, Chidu Narayanan
Covid-19 Impact On The Global Economy Beyond The Near Term, Madhur Jha, Chidu Narayanan
Asian Management Insights
The pandemic is likely to make long term changes to deglobalisation and medium-term inflation.
Rebuilding Global Supply Chains From The Ground Up, Victor Fung, Chin Tiong Tan
Rebuilding Global Supply Chains From The Ground Up, Victor Fung, Chin Tiong Tan
Research Collection Lee Kong Chian School Of Business
Dr Victor Fung, Group Chairman of the Fung Group, talks about how technological changes, geopolitical shifts, and Covid-19 are threatening to turn global supply chains upside down, in this interview with Tan Chin Tiong.
London Heathrow Airport Uses Real-Time Analytics For Improving Operations, Xiaojia Guo, Yael Grushka-Cockayne, Bert De Reyck
London Heathrow Airport Uses Real-Time Analytics For Improving Operations, Xiaojia Guo, Yael Grushka-Cockayne, Bert De Reyck
Research Collection Lee Kong Chian School Of Business
Improving airport collaborative decision making is at the heart of airport operations centers (APOCs) recently established in several major European airports. In this paper, we describe a project commissioned by Eurocontrol, the organization in charge of the safety and seamless flow of European air traffic. The project’s goal was to examine the opportunities offered by the colocation and real-time data sharing in the APOC at London’s Heathrow airport, arguably the most advanced of its type in Europe. We developed and implemented a pilot study of a real-time data-sharing and collaborative decision-making process, selected to improve the efficiency of Heathrow’s operations. …
R&D Project Portfolio Selection With Multiple Stakeholders, Wenqi Lian
R&D Project Portfolio Selection With Multiple Stakeholders, Wenqi Lian
Dissertations and Theses Collection (Open Access)
Research and Development (R&D) is time consuming, expensive and risky; yet product life cycles are shortening and competition is fierce. Therefore, R&D often requires the collaboration and input of multiple stakeholders. This dissertation studies how collaborations involving multiple stakeholders can effectively make R&D project portfolio selection decisions to create the optimal social welfare. The two essays in the dissertation build stylized analytical models to examine R&D project portfolio selection in two different settings, academia and industry respectively. The models explicitly acknowledge the different information, goals and operational decisions of the stakeholders. In the first essay, we study a two-stage funding …
A Simple New Scoring System For Predicting The Mortality Of Severe Acute Pancreatitis: A Retrospective Clinical Study, Lei Wang, Yan-Bo Zeng, Jia-Yun Chen, Qian Luo, Rowan Wang, Ruijie Zhang, Zhichao Zheng, Yuan-Hang Dong, Wen-Bin Zou, Xiaoqing Xie, Yi-Qi Du, Zhao-Shen Li
A Simple New Scoring System For Predicting The Mortality Of Severe Acute Pancreatitis: A Retrospective Clinical Study, Lei Wang, Yan-Bo Zeng, Jia-Yun Chen, Qian Luo, Rowan Wang, Ruijie Zhang, Zhichao Zheng, Yuan-Hang Dong, Wen-Bin Zou, Xiaoqing Xie, Yi-Qi Du, Zhao-Shen Li
Research Collection Lee Kong Chian School Of Business
It is critical to accurately identify patients with severe acute pancreatitis (SAP) in a timely manner. This study aimed to develop a new simplified AP scoring system based on data from Chinese population.We retrospectively analyzed a consecutive series of 585 patients diagnosed with SAP at the Changhai hospital between 2009 and 2017. The new Chinese simple scoring system (CSSS) was derived using logistic regression analysis and was validated in comparison to 4 existing systems using receiver operating characteristic curves.Six variables were selected for incorporation into CSSS, including serum creatinine, blood glucose, lactate dehydrogenase, heart rate, C-reactive protein, and extent of …
Flexibly Serving A Finite Number Of Heterogeneous Jobs In A Tandem System, Yun Fong Lim, Bingnan Lu, Rowan Wang, Wenjia Zhang
Flexibly Serving A Finite Number Of Heterogeneous Jobs In A Tandem System, Yun Fong Lim, Bingnan Lu, Rowan Wang, Wenjia Zhang
Research Collection Lee Kong Chian School Of Business
Many manufacturing and service systems require a finite number of heterogeneous jobs to be processed by two stations in tandem. Each station serves at most one job at a time and there is a finite buffer between the two stations. We consider two flexible servers that are cross-trained to work at both stations. The duration for a server to finish a job at a station is exponentially distributed with a rate that depends on the server, the station, and the job. Our goal is to identify an efficient policy to dynamically assign the servers to the stations such that the …
Integrating Anticipative Replenishment-Allocation With Reactive Fulfillment For Online Retailing Using Robust Optimization, Yun Fong Lim, Song Jiu, Marcus Ang
Integrating Anticipative Replenishment-Allocation With Reactive Fulfillment For Online Retailing Using Robust Optimization, Yun Fong Lim, Song Jiu, Marcus Ang
Research Collection Lee Kong Chian School Of Business
Problem definition: In each period of a planning horizon, an online retailer decides on how much to replenish each product and how to allocate its inventory to fulfillment centers (FCs) before demand is known. After the demand in the period is realized, the retailer decides on which FCs to fulfill it. It is crucial to optimize the replenishment, allocation, and fulfillment decisions jointly such that the expected total operating cost is minimized. The problem is challenging because the replenishment-allocation is done in an anticipative manner under a “push” strategy, but the fulfillment is executed in a reactive way under a …
Covid-19 And The Future Of Chinese Manufacturing, Singapore Management University
Covid-19 And The Future Of Chinese Manufacturing, Singapore Management University
Perspectives@SMU
China is expected to maintain a prominent role in global supply chains despite the COVID-19 pandemic, which has renewed discussions about whether countries around the world have become too reliant on Chinese manufacturing, according to one of The Chinese University of Hong Kong’s (CUHK) leading researchers on global economic networks
Essays On Agricultural Commodity Processing, Bin Li
Essays On Agricultural Commodity Processing, Bin Li
Dissertations and Theses Collection (Open Access)
This dissertation investigates two important issues in agricultural commodity processing: (i) biomass commercialization; that is, converting organic waste into a saleable product, from economic and environmental perspectives, and (ii) optimal procurement portfolio design using multiple suppliers and spot market, and the impact of by-product introduction on this optimal portfolio.
The first chapter examines the economic implications of biomass commercialization from the perspective of an agri-processor that uses a commodity input to produce both a commodity output and biomass. We characterize the value of biomass commercialization and perform sensitivity analysis to investigate how spot price uncertainty (input and output spot price …
Dealing With Global Supply Chain Breaks, Shantanu Bhattacharya
Dealing With Global Supply Chain Breaks, Shantanu Bhattacharya
Research Collection Lee Kong Chian School Of Business
Businesses need to adopt appropriate strategies to deal with the unprecedented impact of Covid-19 on global supply chains.
Primary Care Comprehensiveness And Care Coordination In Robust Specialist Networks Results In Lower Emergency Department Utilization: A Network Analysis Of Medicaid Physician Networks, Zhaowei She, Anne H. Gaglioti, Peter Baltrus, Chaohua Li, Miranda A. Moore, Lilly C. Immergluck, Arthi Rao, Turgay Ayer
Primary Care Comprehensiveness And Care Coordination In Robust Specialist Networks Results In Lower Emergency Department Utilization: A Network Analysis Of Medicaid Physician Networks, Zhaowei She, Anne H. Gaglioti, Peter Baltrus, Chaohua Li, Miranda A. Moore, Lilly C. Immergluck, Arthi Rao, Turgay Ayer
Research Collection Lee Kong Chian School Of Business
Background: Care coordination is an essential and difficult to measure function of primary care. Objective: Our objective was to assess the impact of network characteristics in primary/specialty physician networks on emergency department (ED) visits for patients with chronic ambulatory care sensitive conditions (ACSCs). Subjects and Measures: This cross-sectional social network analysis of primary care and specialty physicians caring for adult Medicaid beneficiaries with ACSCs was conducted using 2009 Texas Medicaid Analytic eXtract (MAX) files. Network characteristic measures were the main exposure variables. A negative binomial regression model analyzed the impact of network characteristics on the ED visits per patient in …
It Won’T Be Business As Usual After Covid-19, Arnoud De Meyer
It Won’T Be Business As Usual After Covid-19, Arnoud De Meyer
Research Collection Lee Kong Chian School Of Business
As customer behaviours change, they will reshape business models in the post-coronavirus world.
Too Good To Eat? Cosmetic Standards And Waste In Agricultural Supply Chain, Jiahui Xu
Too Good To Eat? Cosmetic Standards And Waste In Agricultural Supply Chain, Jiahui Xu
Dissertations and Theses Collection (Open Access)
There is a significant amount of food wasted at the farm level due to high cosmetic standards adopted by retailers. We examine the economic incentives for retailers to adopt such high cosmetic standards and their impact on food loss. We build a sequential game between a retailer and a farmer, where the retailer signs a contract with the farmer specifying both the wholesale price and cosmetic quality standard. By adopting high cosmetic standards, retailers can motivate farmers to exert a higher effort to improve the cosmetic quality, e.g., using better seeds and applying more pesticides. As for the drivers of …
When The Bank Comes To You: Branch Network And Customer Omnichannel Banking Behavior, Mi Zhou, Dan Geng, Vibhanshu Abhishek, Beibei Li
When The Bank Comes To You: Branch Network And Customer Omnichannel Banking Behavior, Mi Zhou, Dan Geng, Vibhanshu Abhishek, Beibei Li
Research Collection School Of Computing and Information Systems
Banks today have been increasingly reducing their physical presence and redirecting customers to digital channels, and yet, the consequences of this strategy are not well studied. This paper investigates the effects of banks' branch network changes (i.e., branch openings and branch closures) on customer omnichannel banking behavior. Using approximately 0.85 million (33 months') anonymized individual-level banking transactions from a large commercial bank in the United States, this paper shows the asymmetric effects of branch openings and branch closures on customer omnichannel banking behavior. In particular, we find that branch openings increase customers' branch transactions; however, the first branch opening leads …
Vehicle Routing Problem For Multi-Product Cross-Docking, Aldy Gunawan, Audrey Tedja Widjaja, Benjamin Gan, Vincent F. Yu, Panca Jodiawan
Vehicle Routing Problem For Multi-Product Cross-Docking, Aldy Gunawan, Audrey Tedja Widjaja, Benjamin Gan, Vincent F. Yu, Panca Jodiawan
Research Collection School Of Computing and Information Systems
Cross-docking is a logistic technique that can reduce costs occurred in a supply chain network while increasing the flow of goods, thus shortening the shipping cycle. Inside a cross-dock facility, the goods are directly transferred from incoming vehicles to outgoing vehicles without storing them in-between. Our research extends and combines this cross-docking technique with a well-known logistic problem, the vehicle routing problem (VRP), for delivering multiple products and addresses it as the VRP for multi-product cross-docking (VRP-MPCD). We developed a mixed integer programming model and generated two sets of VRP-MPCD instances, which are based on VRPCD instances. The instances are …
Economic And Environmental Implications Of Biomass Commercialization In Agricultural Processing, Bin Li, Onur Boyabatli, Buket Avci
Economic And Environmental Implications Of Biomass Commercialization In Agricultural Processing, Bin Li, Onur Boyabatli, Buket Avci
Research Collection Lee Kong Chian School of Business
Motivated by the agricultural industries, this paper studies the economic and environmental implications of biomass commercialization; that is, converting organic waste into a saleable product, from the perspective of a processor that uses a commodity input to produce both a commodity output and biomass. We characterize the economic value of biomass commercializa- tion and examine how input and output spot price uncertainties affect this value. Using a model calibration, we find that lower input spot price variability or higher output spot price variabil- ity or correlation between the two spot prices increases this value for a typical palm oil mill. …
Strategic Intent Of Obor: Enhancing Energy Supply Resilience, Loon Ching Tang, Joyce M. W. Low
Strategic Intent Of Obor: Enhancing Energy Supply Resilience, Loon Ching Tang, Joyce M. W. Low
Research Collection Lee Kong Chian School Of Business
Since the launch of the One Belt, One Road (OBOR) initiative in 2015, China has announced its intention to invest in major infrastructure projects to promote trade and co-operation with its trading partners along OBOR. This paper examines the current level of trading and key projects underway along OBOR so as to provide insights to understand its strategic intent. In particular, a network model is constructed to analyze the impact to China current and future demand for energy under various conditions especially during prolonged periods of supply uncertainties. Since these key projects are closely connected to the current and proven …
Managing Clinic Variability With Same-Day Scheduling, Intervention For No-Shows, And Seasonal Capacity Adjustments, Kum Khiong Yang, Tugba Cayirli
Managing Clinic Variability With Same-Day Scheduling, Intervention For No-Shows, And Seasonal Capacity Adjustments, Kum Khiong Yang, Tugba Cayirli
Research Collection Lee Kong Chian School Of Business
This study investigates demand and capacity strategiesfor managing clinic variability. These include (i) same-day scheduling tocontrol random walk-ins, (ii) no-show intervention, where the clinic callsadvance-booked patients a day before to identify and release canceled slots tosame-day patients, and (iii) adjustments to daily number of appointments foradvance-booked patients to match seasonal variations in same-day demand. Thesestrategies are tested over the individual-block/fixed-interval (IBFI) and theDome appointment rules. The resulting appointment systems are tested underscenarios with different levels of same-day demand, demand seasonality,no-shows and cost ratios. The goal is to minimize the weighted sum of patients’wait time and physician’s idle-time and overtime. Our …
Simulation Model To Evaluate Effectiveness Of Queue Management Tool In Supermarket Retail Chain, Michelle L. F. Cheong, Yong Qing Chia
Simulation Model To Evaluate Effectiveness Of Queue Management Tool In Supermarket Retail Chain, Michelle L. F. Cheong, Yong Qing Chia
Research Collection School Of Computing and Information Systems
As part of its continuous process to improve operational excellence and productivity, a retail company in South East Asia trialed the usage of a commercial market retail tool, known as Queue Buster, to improve queue management processes in its physical stores. We employed Queuing Theory to determine the effectiveness of implementing the Queue Buster. Specifically, we constructed a queuing simulation model based on input parameters derived from queuing data collected at a pilot store. Three main performance metrics - Wait Time, System Time and System Length were measured fortwo different queue systems, with and without the implementation of Queue Buster. …
Urban Consolidation Center Or Peer-To-Peer Platform? The Solution To Urban Last-Mile Delivery, Qiyuan Deng, Xin Fang, Yun Fong Lim
Urban Consolidation Center Or Peer-To-Peer Platform? The Solution To Urban Last-Mile Delivery, Qiyuan Deng, Xin Fang, Yun Fong Lim
Research Collection Lee Kong Chian School Of Business
Booming e-commerce activities further increase this demand, exerting intense pressure on the cities' well-being. To build a city with congestion and pollution under control, a consolidator can operate an urban consolidation center (UCC) to bundle shipments from multiple carriers before the last-mile delivery. Alternatively, the consolidator can operate a peer-to-peer platform for the carriers to share their delivery capacity. Our objective is to compare the performance of these two business models. Under each business model, we study the interactions between a consolidator and multiple carriers using a two-period game-theoretical model. In each period, the consolidator first chooses a delivery fee …
A Demand And Supply Game Exploring Global Supply Chains, Bei Hong
A Demand And Supply Game Exploring Global Supply Chains, Bei Hong
Research Collection School Of Economics
In this article, the author describes a classroom experiment in which participants make decisions to achieve the lowest-cost production. Student volunteers acting as smartphone companies are provided with confidential information representing their own cost of production and are asked to make trade decisions to form a supply chain at the lowest possible cost. This interactive classroom experiment facilitates an understanding and appreciation of the basic demand and supply model. Students also explore the motivations, facilitators, and impediments of global supply chains. Suggestions are made to expand the game by incorporating more sophisticated models of the global supply chain, and also …
How To Optimize Storage Classes In A Unit-Load Warehouse, Marcus Ang, Yun Fong Lim
How To Optimize Storage Classes In A Unit-Load Warehouse, Marcus Ang, Yun Fong Lim
Research Collection Lee Kong Chian School Of Business
We study a problem of optimizing storage classes in a unit-load warehouse such that the total travel cost is minimized. This is crucial to the operational efficiency of unit-load warehouses, which constitute a crit- ical part of a supply chain. We propose a novel approach called the FB method to solve the problem. The FB method is suitable for general receiving-dock and shipping-dock locations that may not coincide. The FB method first ranks the locations according to the frequencies that they are visited, which are estimated by a linear program based on the warehouse’s layout as well as the products’ …
Effects Of Rescheduling On Patient No-Show Behavior In Outpatient Clinics, Jiayi Liu, Jingui Xie, Kum Khiong Yang, Zhichao Zheng
Effects Of Rescheduling On Patient No-Show Behavior In Outpatient Clinics, Jiayi Liu, Jingui Xie, Kum Khiong Yang, Zhichao Zheng
Research Collection Lee Kong Chian School Of Business
We study the effects of rescheduling on no-show behavior in an outpatient appointment system for both new and follow-up patients. Previous literature has primarily focused on new patients and investigated the role of waiting time on no-show probability. We offer a more nuanced understanding of this costly phenomenon. Using comprehensive clinical data, we demonstrate that for follow-up patients, their no-show probability decreases by 10.9 percentage points if their appointments were rescheduled at their own request, but increases by 6.2 percentage points if they were rescheduled by the clinic. New patients, in contrast, are more concerned about waiting time and less …
Capacity Allocation In Flexible Production Networks: Theory And Applications, Guodong Lyu, Wang-Chi Cheung, Mabel C. Chou, Chung-Piaw Teo, Zhichao Zheng, Yuanguang Zhong
Capacity Allocation In Flexible Production Networks: Theory And Applications, Guodong Lyu, Wang-Chi Cheung, Mabel C. Chou, Chung-Piaw Teo, Zhichao Zheng, Yuanguang Zhong
Research Collection Lee Kong Chian School Of Business
In many production environments, a fixed network of capacity is shared flexibly between multiple products with random demands. What is the best way to configure the capacity of the production network and to allocate the available capacity, to meet pre-determined fill rate requirements? We develop a new approach for network capacity configuration and allocation, and characterize the relationship between the capacity of the network and the attainable fill rate levels for the products, taking into account the flexibility structure of the network. This builds on a new randomized allocation mechanism to deliver the desired services.We use this theory to investigate …
Technology Specifications And Production Timing In A Co-Opetitive Supply Chain, Baozhuang Niu, Kanglin Chen, Xin Fang, Xiaohang Yue, Xin Wang
Technology Specifications And Production Timing In A Co-Opetitive Supply Chain, Baozhuang Niu, Kanglin Chen, Xin Fang, Xiaohang Yue, Xin Wang
Research Collection Lee Kong Chian School Of Business
Motivated by Google’s technology specifications on Android devices, we consider firms’ decisions on production timing in a co-opetitive supply chain comprising a manufacturer and an original equipment manufacturer (OEM), where the manufacturer acts as the OEM’s upstream contract manufacturer and downstream competitor. We consider the market acceptance uncertainty of key product designs. If a firm decides to implement ex post production strategy (PS), it can delay the production until the market acceptance uncertainty of its product is resolved. Otherwise, ex-ante production strategy (AS) is implemented. We find that, due to the co-opetition, PS does not always benefit either the manufacturer …
Modeling Newsvendor Behavior: A Prospect Theory Approach, Bhavani Shanker Uppari, Sameer Hasija
Modeling Newsvendor Behavior: A Prospect Theory Approach, Bhavani Shanker Uppari, Sameer Hasija
Research Collection Lee Kong Chian School Of Business
Problem definition: Studies have shown that the behavior of subjects in newsvendor experiments is not consistent with expected profit maximization - an assumption that is often made in operations management literature. Although prospect theory has been established as a popular model of behavioral decision making under uncertainty, it was considered to be inconsistent with observed newsvendor behavior (in particular, the pull-to-center effect) until a recent study proposed a prospect theory model that is consistent with the pull-to-center effect; however, this model's ability in representing newsvendor behavior compared to other plausible prospect theory models is unexplored in the literature. This paper …