Authors: Mohammad E. Nikoofal, Mehmet Gumus

Publication: Production and Operations Management, Forthcoming

Abstract:

This paper develops a dyadic supply chain model with one buyer who contracts the manufacturing of a new product to a supplier. Due to the lack of experience in manufacturing, the extent of supply risk is unknown to both the buyer and supplier before the time of contract. However, after the contract is accepted, the supplier may invest in a diagnostic test to acquire information about his true reliability, and use this information when deciding on a process improvement effort. Using this setting, we identify both operational and strategic benefits and costs of diagnostic test. Operationally, it helps the supplier to take the first-best level of improvement effort, which would increase efficiency of the total supply chain. Strategically, it enables the buyer to reduce the agency costs associated with implementing process improvement on the supplier. Besides these benefits, diagnostic test increases the degree of information asymmetry along the supply chain. This in turn provides the supplier with proprietary information, whose rent would be demanded from the buyer in equilibrium. Benefit-cost analysis reveals two key factors in determining the value of diagnostic test: (i) degree of endogenous information asymmetry between supply chain firms, and (ii) the relative cost of diagnostic test with respect to process improvement cost. Our results indicate that when both are high, the mere presence of diagnostic test can result in less reliable supply chain. This implies that when incentives are not properly aligned, information asymmetry amplified due to diagnostic test neutralizes all its benefits.

Classified as: Mehmet Gumus, operations management, Desautels 22, Production & Operations Management
Category:
Published on: 23 Jul 2018

Authors: Derek D. Wang, Shanling Li, Toshiyuki Sueyoshi

Publication: Journal of Cleaner Production, Vol. 196, September 2018

Abstract:

Classified as: Shanling Li, operations management, Sustainability, Sustainability (R)
Category:
Published on: 23 Jul 2018

Authors: Eduard Calvo, Ruomeng Cui and Juan Camilo Serpa

Publication: Management Science, Volume 65, Issue 12, December 2019, Pages 5651-5675.

Abstract:

In the U.S., four in ten public infrastructure projects report delays or cost overruns. To tackle this problem, regulators often scrutinize the project contractor’s operations. We investigate the causal effect of government oversight on project efficiency by gleaning 262,857 projects that span seventy-one U.S. federal agencies and 54,739 contractors. Our identification strategy exploits a regulatory bylaw: if a project’s anticipated budget exceeds a threshold value, the contractor’s operations are subject to surveillance from independent procurement officers; otherwise, these operational checks are waived. Using a regression discontinuity design, we find that oversight is obstructive to the project’s operations, especially when the contractor (i) has no prior experience in public projects, (ii) is paid with a fixed-price contract that includes performance-based incentives, and (iii) performs a labor-intensive task. In contrast, oversight is least obstructive — or beneficial — when the contractor (i) is experienced, (ii) is paid with a time-and-materials contract, and (iii) performs a machine-intensive task.

Classified as: Juan Serpa, operations management, management science, Desautels 22
Category:
Published on: 10 Jul 2018

Authors: Robert Bray, Juan Camilo Serpa and Ahmet Colak

Publication: Management Science, Volume 65, Issue 9, September 2019, Pages 4079-4099.

Abstract:

We explore the effect of supply chain proximity on product quality by merging four independent data sources from the automotive industry, collecting: (i) auto component defect rates, (ii) upstream component factory locations, (iii) downstream assembly plant locations, and (iv) product-level links connecting the upstream and downstream factories. Combining these four datasets allows us to trace the flow of 27,807 products through 529 supplier factories and 275 assembly plants. We estimate that increasing the distance between an upstream component factory and a downstream plant by an order of magnitude increases the component’s expected defect rate by 3.9%. We also find that shorter inter-factory spans are associated with more rapid product quality improvements, and that supply chain distance is more detrimental to quality when automakers: (i) produce early generation models or (ii) high-end products, (iii) when they buy components with more complex configurations, or (iv) when they source from suppliers who invest relatively little in research and development

Classified as: Juan Serpa, operations management, management science, Desautels 22
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Published on: 11 Jun 2018

Authors: Paul Intrevado,  Vedat Verter and Lucie Tremblay

Publication: Health Care Management Science, Forthcoming

Abstract:

Classified as: operations management
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Published on: 8 Jun 2018

Authors: Fangzheng Cheng, Tijun Fan, Dandan Fan and Shanling Li

Publication: Energy Economics, Vol. 72, May 2018

Abstract:

Classified as: Shanling Li, operations management, Sustainability, Sustainability (R)
Category:
Published on: 4 Jun 2018

Authors: Wei Qi, Lefei Li, Sheng Liu, Zuo-Jun Max Shen

Publication: Manufacturing & Service Operations Management, Vol. 20, No. 4, Fall 2018

Abstract:

Classified as: Wei Qi, operations management, Sustainability, Sustainability (R)
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Published on: 29 Mar 2018

Authors: Wei Qi, Bo Shen, Hongcai Zhang, Zuo-Jun Max Shen

Publication: Energy, Vol. 135, September 2017

Abstract: 

Classified as: Wei Qi, operations management, Sustainability, Sustainability (R)
Category:
Published on: 29 Mar 2018

Authors: Manaf Zargoush, Mehmet Gumus, Vedat Verter, Stella Daskalopoulou

Journal Name: Production and Operations Management, Forthcoming

Abstract:

Hypertension has not been well studied by operations researchers from a clinical decision support perspective. Moreover, little personalized (i.e. patient-centric) guidance is available regarding the number and combination of antihypertensive medications. To fill this gap, we develop a Markov Decision Process (MDP) to characterize the optimal sequence (and combination) of antihypertensive medications under the standard medication dose. Our model is patient-centric as it takes into account a set of relevant patient characteristics such as age, gender, blood pressure level, smoking habits, diabetes status, and cholesterol level. Based on a set of intuitive assumptions, we prove that our model yields a series of structured optimal policies. Having calibrated our model based on real data and medical literature, we analyze these optimal policies and discuss their insights to the real practice. We also compare the benefits, in terms of quality adjusted life expectancy, QALE, obtained from our results with those obtained from British Hypertension Society (BHS) guideline.

Classified as: Mehmet Gumus, operations management, Production & Operations Management, Desautels 22
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Published on: 20 Mar 2018

Authors: Shumail Mazahir, Vedat Verter, Tamer Boyaci and Luk van Wassenhove

Publication: Production and Operations Management, Forthcoming

Abstract:

This paper presents an analytical framework of the product take back legislation in the context of product reuse. We characterize existing and proposed forms of E-waste legislation and compare their environmental and economic performance. Using stylized models, we analyze an OEM’s decision about new and remanufactured product quantity in response to the legislative mechanism. We focus on the 2012 waste electrical and electronic equipment directive in Europe, where the policy-makers intended to create additional incentives for the product reuse. Through a comparison to the original 2002 version of the directive, we find that these incentives translate into improved environmental outcomes only for a limited set of products. We also study a proposed policy that advocates a separate target for the product reuse. Our analysis reveals that from an environmental standpoint, the recast version is always dominated either by the original policy or by the one that advocates a separate target for the product reuse. We show that the benefits of a separate reuse target scheme can be fully replicated with the aid of fiscal levers. Our main message is that there cannot be a single best environmental policy that is suitable for all products. Therefore, the consideration of product attributes is essential in identification of the most appropriate policy tool. This can be done either by the implementation of different policies on each product category or by implementation of product based target levels.

Classified as: operations management, Desautels 22, Sustainability, Sustainability (R), Production & Operations Management
Category:
Published on: 19 Mar 2018

The McGill Food Analytics Club (McGill FAC) is a student-driven data analytics club that focuses on food. As the world is heading towards a massive food crisis the next decade, there is an urgent need to come up with solutions. Inspired and supported by Desautels Professor Juan Camilo Serpa, the club members want to contribute to solving this food crisis with data analytics. This includes research, coding and outreach.

Classified as: Juan Serpa, operations management, Masters of Management in Analytics (MMA), McGill Food Analytics Club (McGill FAC)
Published on: 9 Mar 2018

Authors: Otavio Bittencourt, Vedat Verter, Morty Yalovsky

Publication: International Journal of Productivity and Performance

Abstract:

Purpose

The purpose of this paper is to focus on the contributions of queueing theory to hospital capacity management to improve organizational performance and deal with increased demand in the healthcare sector.

Classified as: operations management, Morty Yalovsky
Category:
Published on: 23 Feb 2018

Professor Juan Serpa's paper "The Impact of Supply Chains on Firm-Level Productivity," together with Harish Krishnan was selected by the Editor-in-Chief of Management Science one of the three Featured Articles for the February 2018 issue.

Management Science is a scholarly journal that publishes scientific research on the practice of management. Within our scope are all aspects of management related to strategy, entrepreneurship, innovation, information technology, and organizations as well as all functional areas of business, such as accounting, finance, marketing, and operations. We include studies on organizational, managerial, and individual decision making, from both normative and descriptive perspectives.

Classified as: Juan Serpa, operations management, management science, Desautels 22
Category:
Published on: 22 Feb 2018

Authors: Hijun Wang, Shanling Li and Jianwen Luo 

Publication: International Journal of Production Research, Forthcoming

Abstract: 

Classified as: Shanling Li, operations management
Category:
Published on: 16 Feb 2018

Authors: Arcan Nalca, Tamer Boyaci and Saibal Ray

Publication: European Journal of Operational Research, Forthcoming

Abstract:

Classified as: Saibal Ray, operations management
Category:
Published on: 30 Jan 2018

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