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Professor Saif Benjaafar

Saif Benjaafar

 

Distinguished McKnight University Professor
Director, Initiative on the Sharing Economy
Ph.D., Purdue University, School of Industrial Engineering, 1992
M.S., Purdue University, School of Industrial Engineering, 1989
B.S., University of Texas at Austin, Department of Electrical Engineering, 1987

Office: ME 130G - phone: (612) 626-7239
Email: saif@umn.edu
Personal Page
Initiative on the Sharing Economy


Research

Broad research interests in operations management and operations economics, with applications in supply chains, service systems, and transportation. Current research focuses on sustainability and environmental modeling in supply chains, sharing economy and peer-to-peer collaborative consumption, and innovation in business models.  


Selected Publications

Benjaafar, S., W. Yu and D. Chen, “Managing Production-Inventory Systems with Scarce Resources,” forthcoming in Manufacturing and Service Operations Management, (Winner of the INFORMS Section on Energy, Natural Resources, and the Environment Best Student Paper Award, 2013; POMS-HK Best Student Paper Award, Finalist, 2013).

Benjaafar, S., G. Kong and X. Li, “Peer-to-Peer Product Sharing: Implications for Ownership, Usage and Social Welfare in the Sharing Economy,” (POMS-HK Best Student Paper Award, Finalist, 2016; Top 10 most downloaded papers at SSRN).

Yu, Y., S. Benjaafar and Y. Gerchak, “On Service Capacity Pooling and Cost Sharing among Independent Firms,” Production and Operations Management, 24, 1285–1310, 2015 (Winner of the IIE Pritsker Best Doctoral Dissertation Award, 2010).

Wang, Y., O. Jouini and S. Benjaafar, “Service Systems with Finite and Heterogeneous Customer Arrivals,” Manufacturing and Service Operations Management, 16, 365-380, 2014 (Winner of the IIE Pritsker Best Doctoral Dissertation Award, 2015).

Chen, X. and S. Benjaafar, “The Carbon-Constrained EOQ,” Operations Research Letters, 41, 172-179, 2013 (Most cited paper in the journal for the period 2010-2016; most downloaded papers in 2013-2016). The paper has been listed as a Highly Cited Paper by ISI Thomson Reuters for receiving “enough citations to place it in the top 1% of the academic field of Engineering based on a highly cited threshold for the field and publication year.”

Hua, Z., W. Zhang and S. Benjaafar, “Optimal Inventory Control with Heterogeneous Suppliers,” Production and Operations Management, 21, 564-575, 2012.

Benjaafar, S., Y. Li and M. Daskin, “Carbon Footprint and the Management of Supply Chains: Insights from Simple Models,” IEEE T-ASE, 10, 99-116, 2013 (Invited article for the Special Issue on Green Manufacturing; Most downloaded papers in 2013-2016; Top 4 all time most cited papers for the journal). The paper has been listed as a Highly Cited Paper by ISI Thomson Reuters for receiving “enough citations to place it in the top 1% of the academic field of Engineering based on a highly cited threshold for the field and publication year.”

Benjaafar, S., M. Elhafsi, C. Y. Lee and W. Zhou, “Optimal Control of Assembly Systems with Multiple Stages and Multiple Demand Classes,” Operations Research, 59, 522–529, 2011.

Benjaafar, S., W. L. Cooper and S. Mardan, “Production-Inventory Systems with Imperfect Advance Demand Information and Updating,” Naval Research Logistics, 58, 88-106, 2011 (Winner of the Harold W. Kuhn Award, 2012).

Benjaafar, S., J. P. Gayon, and S. Tepe, “Production-Inventory Systems with Customer Impatience,” Operations Research Letters, 38, 267-272, 2010.

Benjaafar, S., M. Elhafsi and T. Huang, “Optimal Control of a Production-Inventory System with both Backorders and Lost Sales,” Naval Research Logistics, 57, 252-265, 2010.

Gayon, J. P., S. Benjaafar and F. de Véricourt, “Using Imperfect Demand Information in Production-Inventory Systems with Multiple Demand Classes,” Manufacturing and Service Operations Management, 11, 128-143, 2009 (Winner of the M&SOM Best Paper Award, 2011). An article authored by Jeannette Song highlighting the contributions of the paper appeared in Manufacturing and Service Operations Management, 13, 419, 2011.

Hu, B. and S. Benjaafar, “On Server Partitioning in Queueing Systems during Rush Hour,” Manufacturing and Service Operations Management, 11, 416-428, 2009 (featured in Focus on Queueing Systems, a collection of papers published by INFORMS Online in 2013).

Gaglioppa, F., L. Miller and S. Benjaafar, “Multi-Task and Multi-Stage Production Planning and Scheduling for Process Industries,” Operations Research, 56, 110-1025, 2008.

Benjaafar, S., Y. Li, D. Xu and S. Elhedhli, “Demand Allocation in Systems with Multiple Inventory Locations and Multiple Demand Sources,” Manufacturing and Service Operations Management, 4, 43-60, 2008.

Benjaafar, S., E. Elahi and K. Donohue, “Outsourcing via Service Quality Competition,” Management Science, 53, 241-259, 2007.

Benjaafar, S. and M. Elhafsi, “Production and Inventory Control of a Single Product Assemble-to-Order System with Multiple Customer Classes,” Management Science, 52, 1896-1912, 2006.

Benjaafar, S., William L. Cooper and J. S. Kim, “On the Benefits of Pooling in Production-Inventory Systems,” Management Science, 51, 548-565, 2005.

Benjaafar, S., M. Elhafsi and F. de Véricourt, “Demand Allocation in Multi-Product, Multi-Facility Make-to-Stock Systems,” Management Science, 50, 1431–1448, 2004.

Gurumurthi, S. and S. Benjaafar, “Modeling and Analysis of Flexible Queueing Systems,” Naval Research Logistics, 51, 755-782, 2004.

Strike, D. and S. Benjaafar, “Practice Abstract: Optimizing Inventory Control at 3M,” Interfaces, 34, 115-116, 2004 (INFORMS Edelman Award, Semifinalist).

Benjaafar, S., “Modeling and Analysis of Congestion in the Design of Facility Layouts,” Management Science, 48, 679-204, 2002.

Benjaafar, S., S. Heragu and S. Irani, “Next Generation Factory Layouts: Research Challenges and Recent Progress,” Interfaces, 32, 6, 58-76, 2002 (One of the most frequently cited papers in Interfaces according to research published in Interfaces in 2010).

Kim, J. S. and S. Benjaafar, “Extended Abstract: On the Benefits of Inventory Pooling in Production-Inventory Systems,” Manufacturing and Service Operations Management, 4, 12-16, 2002 (M&SOM Best Student Paper Award, Honorable Mention).

For a full list of publications with access to electronic copies, please click here> (https://benjaafar.com/publications/).




Upcoming Seminar

News

Professor Benjaafar - named Director of the Initiative on the Sharing Economy... Read More...

Symposium on the Sharing Economy held last May... Read More...

Sherwin Doroudi - joined the Department as an Assistant Professor... Read More...

Mehdi Behroozi, a recent ISyE PhD grad, offered position as Asst. Professor at Northeastern... Read More...

ISyE Undergrad student Christopher Kuehn - co-founder of AdrenaCard, an epi-pen alternative. Read More...

Dr. Leder awarded the NSF CAREER Award: Rare Events in Cancer Evolution with a grant in the amount of $500,000. Read More...

A paper by ISyE doctoral student Xiang Li was a finalist for the 2016 POMS-HK Best Student Paper Award. Read More...

Professor Benjaafar - keynote speaker at the Big Data and Connected Business Conference held in Taipei, Taiwan. Read More...

Mehdi Behroozi - Second Place Award in the IIE Doctoral Colloquium Poster Presentations Competition. Read More...

Dr. Zhang's paper "Semidefinite Relaxation of Quadratic Optimization Problems" - 2015 SPS Signal Processing Magazine Best Paper Award.

ISyE professors Cooper and Wang awarded NSF grant of $269,000 for August 2015-2018 - "Revenue Management with Network Effects." Read More...

Dr. Zhang - awarded $299,999 NSF grant for his project "Gradient Methods for Solving Big Data (Tensor) Optimization Problems". Read More...