Debjit Roy

Biography

Debjit Roy is an Institute Chair Professor in the Operations and Decision Sciences area at the Indian Institute of Management Ahmedabad, India. He holds a Ph.D. in Industrial Engineering (with a major in Decision Sciences/Operations Research and a minor in Computer Science) and an MS in Manufacturing Systems Engineering from the University of Wisconsin-Madison besides an M.Sc. (Engineering) from the Indian Institute of Science, Bangalore, India. He is also a visiting professor at the Rotterdam School of Management, Erasmus University, and Stephen M. Ross School of Business, University of Michigan, where he is actively involved in both teaching and research in the broad areas of operations and logistics. At IIM Ahmedabad, he serves as the chair of research and publications office and founding co-chair of the Centre for Transportation and Logistics.

His research focuses on improving system performance using quantitative methods such as stochastic modeling and optimization. His specific research interests are to estimate the performance of logistical and service systems such as container terminals, automated distribution centers, vehicle rental, healthcare, and restaurant systems. He has received several research awards including the IIE Transactions best conference paper award in Facility Logistics (2011, 2019), honorable mention for the Jack Meredith best paper award in Journal of Operations Management (2019), and honorable mention designation in the IIE Transactions best applications paper award competition (2016), and has published in several leading international journals such as Operations Research, Transportation Science, Journal of Operations Management, IISE Transactions, and Interfaces. He is also the lead author of the first book on Trucking Business Management published by McGraw-Hill in 2016. He served the Transportation Science and Logistics Society (INFORMS) board as an International Liaison Officer for Asia, Australia, and New Zealand (2017-2019). In 2019, he received the Innovative Teaching Award from Rotterdam School of Management, Erasmus University. He received the IIMA outstanding researcher award during 2018 and 2020. In 2020, he received the InsideIIM Best Professor of the Year Award and was also elected as the chair of the Facility Logistics SIG, Transportation Science, and Logistics INFORMS Society. In 2021, he received the Basant Kumar Birla Distinguished Research Scholar Award for Social Science and Management. In 2022, he received the INFORMS Innovative Applications in Analytics Award, IIMA's Distinguished PGPX Faculty Award, and the best paper award at the POM India International Conference.

At IIM Ahmedabad, he coordinates the executive education programmes in Restaurant Management, Warehouse Design and Management, Youth Transport Entrepreneurs Programme, and Logistics Management. His teaching interests include various courses in Operations and Logistics Management, Quantitative System Performance, and Manufacturing Strategy.

Area

Primary Area : Operations and Decision Sciences

Contact

Email : debjit@iima.ac.in

Phone : +91-79-7152 4823

Office : KLMDC FF Room No 62

Secretary : Anjali Nair

Phone : +91-79-7152 7742

Website : Personal Website

Education

B.Tech., Manufacturing Engineering, National Institute of Foundry and Forge Technology, Ranchi, India, 2000

M.Sc. (Engineering), Management Studies, Indian Institute of Science, Bangalore, India, 2002

M.S., Manufacturing Systems Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA, 2007

Ph.D., Industrial and Systems Engineering, Decision Science/Operations Research, University of Wisconsin-Madison, Madison, Wisconsin, USA, 2011

Teaching

MBA Teaching, IIM Ahmedabad
Course title: Probability and Statistics –I, Logistics Management, Operations Management-I, Operations Management – II, Manufacturing Operations Management, Quantitative System Performance
Feedback: 9/10 (on average)

Executive MBA Teaching, IIM Ahmedabad
Course title: Setting and Delivering Service Levels, Logistics Management
Feedback: 9/10 (on average)

MBA Teaching, Rotterdam School of Management
Course title: Advanced Supply Chain Management (co-taught with Prof. Finn Wynstra)
Feedback: 4.8/5 (on average)

Masters in SCM, Rotterdam School of Management
Course title: Managing performance of manufacturing and service systems
Feedback: 4.5/5 (on average)

EXECUTIVE EDUCATION
Facilitator, Management Development Programme at IIM Ahmedabad (2012-Present)

Warehouse Design and Management
Delivering Logistics Solutions
Supply Chain Management
Youth Transport Entrepreneur Programme
Restaurant Management

PROFESSIONAL SERVICE

Transportation Science and Logistics Society, International Liaison for Asia, Australia and New Zealand
Co-coordinator Pre-proposal Doctoral Consortium at Decision Science Conference (2017, 2018)
TSL Cluster Co-Chair – INFORMS International Conference Taipei, 2018
Special Issue Co-editor, International Journal of Production Research, Warehouse Design and Management
Chair – Post Graduate Programme in Food and Agri-business Management (June 2015 – June 2017)
Adhoc Reviewer of IIE Transactions, International Journal of Production Research, Transportation Science, Operations Research, MSOM, European Journal of Operations Research, Computers and Operations Research
Editorial Board Member of International Journal of Automation and Logistics
Reviewer for 2011 IERC Conference, 2010 M&SOM Conference, 2013, 2011 and 2010 IEEE Conference on Automation Science and Engineering
Member of the ISyE Student Advisory Board (2007 – 2010)
Member of INFORMS

PHD STUDENT SUPERVISION

Tim Lamballais (2019, RSM) – Daily Supervisor
Kaveh Azadeh (2019, RSM) – Daily Supervisor
Govind Lal Kumawat (2019, IIMA) - Chair
Arulanantha Prabu (2019, IIMA) – Co-chair
Vishal Bansal (2019, IIMA) - Chair

Research Area

Applications
Logistics and service systems including container terminals, automated warehouses, vehicle rental, trucking, dine-in restaurants.

Methods
Stochastic processes, Queuing theory, Optimization, Simulation, Empirical

Academic Experience

Visiting Associate Professor in Technology and Operations, Stephen M. Ross School of Business University of Michigan, Ann Arbor, USA, (August 2018-May 2019)

Visiting Professor in Technology and Operations, Stephen M. Ross School of Business University of Michigan, Ann Arbor, USA, (March 2020-April 2020)

Postdoctoral Researcher, Department of Technology and Operations Management Rotterdam School of Management Erasmus University, Netherlands, (August 2011-February 2012)

Associate Professor in Operations Management, Department of Technology and Operations Management Rotterdam School of Management Erasmus University, Netherlands, (March 2017-present)

Assistant Professor in Operations Management, Department of Operations and Decision Sciences Indian Institute of Management Ahmedabad, Gujarat, India, (March 2012-August 2014)

Associate Professor in Operations Management, Department of Operations and Decision Sciences Indian Institute of Management Ahmedabad, Gujarat, India, (September 2014-February 2020)

Professor of Operations Management, Department of Operations and Decision Sciences Indian Institute of Management Ahmedabad, Gujarat, India, (March 2020-Present)

Visiting Researcher, Advising PhD students who are working on distribution warehouse management, and independent research on container terminals, warehouse automation and robotization., Rotterdam School of Management, Erasmus University, April-May 2013, April-May 2014, April-May 2015, May-June 2016

Doctoral Research, Thesis - Design and Analysis of Unit-load Warehouse Operations using Autonomous Vehicles, University of Wisconsin-Madison, 2011

Master's Research, Thesis - Stochastic Models for Stock Rationing in Multi-echelon Supply Chains, Indian Institute of Science, 2002

Professional Experience

Member of INFORMS

Member of the ISyE Student Advisory Board, 2007 – 2010

Reviewer for 2011 IERC Conference, 2010 M&SOM Conference, 2013, 2011 and 2010 IEEE Conference on Automation Science and Engineering, 2010,2011,2013

Editorial Board Member of International Journal of Automation and Logistics

Adhoc Reviewer of IIE Transactions, International Journal of Production Research, Transportation Science, Operations Research, MSOM, European Journal of Operations Research, Computers and Operations Research

Chair – Post Graduate Programme in Food and Agri-business Management, June 2015 – June 2017

Special Issue Co-editor, International Journal of Production Research, Warehouse Design and Management

TSL Cluster Chair – INFORMS International Conference Taipei, 2018

Transportation Science and Logistics Society, International Liaison for Asia, Australia and New Zealand

Funded Research Projects

Social Interactions: Increases or Diminishes Productivity (Amount: INR 200000), IIMA Seed grant, 2018

Green Design to Green Disposal (Partner University: Sheffield University Management School, The University of Sheffield, Conduit Road, Sheffield S10 1FL, UK.) (IIM Ahmedabad portion, INR 2200000), UKIERI UGC Thematic Awards-UGC-2013-14/067

Stochastic Modeling and Design Insights for Container Terminal Operations (Amount: INR 190000), Status: Complete

Improving throughout Capacity in Distribution Warehouses Using Variants of Vehicle-based Technologies (Amount: INR 190000), Status: Complete

Closed-Loop Inventory Models for the Pallet Supply Chains (Amount: INR 248500), Status: Complete

Estimating Vessel Sojourn Times in Unloading Operations at Sea Container Terminals (Amount: INR 248000), Status: Complete

Stochastic Modeling of Restaurant Operations (Amount: INR 248000), Status: Ongoing

Modeling Landside Operations in a Container Terminal with Non-stationary Arrivals(Amount: INR 248000), Status: Ongoing

Data Driven E-Commerce Order Fulfillment (Partner University: TU Eindhoven) Estimated amount: 500,000 Euro (to be shared), Indo-Dutch Grant

Jan-Kees van Ommeren, Niek Baer, Nishant Mishra, and Debjit Roy, Batch service systems with heterogeneous servers, Queueing Systems and Applications (2020)

G. L. Kumawat, D. Roy, R. de Koster, I.J.B.F. (Ivo) Adan, Stochastic Modelling of Parallel Process Flows in Intra-logistics Systems with an Application to a Container Terminal, European Journal of Operational Research (2020)

G. L. Kumawat and D. Roy, AGV or Lift-AGV? Performance Trade-offs and Design Insights for Container Terminals with Robotized Transport Vehicle Technology, IISE Transactions (2020)

T. Lamballais, D. Roy, R. de Koster, Inventory Allocation in Robotic Mobile Fulfillment Systems, IISE Transactions (2019)

D. Roy, R. de Koster, R. Bekker, Modeling and design of container terminal operations, Operations Research (2019)

A. Kumar, D. Roy, V. Verter, and D. Sharma, Integrated Fleet Mix and Routing Decision for Hazmat Transportation: A Developing Country Perspective, European Journal of Operational Research, 264(1), 225-238 (2018)

F. Tornese , J. A. Pazour, B. K. Thorn , D. Roy, A. L. Carrano, Investigating the environmental and economic impact of loading conditions and repositioning strategies for pallet pooling providers, Journal of Cleaner Production, 172, 155-168 (2018)

A. Kumar, D. Roy, V. Verter, and D. Sharma, Integrated Fleet Mix and Routing Decision for Hazmat Transportation: A Developing Country Perspective, European Journal of Operational Research, 264(1), 225-238 (2018)

D. Roy and R. de Koster, Stochastic Modeling of Unloading and Loading Operations at a Container Terminal using Automated Lifting Vehicles, European Journal of Operational Research, 266(3), 895-910, (2018)

V. Dhingra, G. Kumawat, D. Roy, and R. de Koster, Solving Semi-open Queuing Networks with Time-varying Arrivals: An Application in Container Terminal Landside Operations, European Journal of Operational Research, 267(3), 855-876 (2018)

S. S. Mofidi, J. Pazour, and D. Roy, Proactive vs. Reactive Order-Fulfillment Resource Allocation for Sea-based Logistics, Transportation Research Part E: Logistics and Transportation Review, 114, 66-84, (2018)

J. de Vries, D. Roy, R. de Koster, Worth the wait? How restaurant waiting time influences customer behavior and revenue, Journal of Operations Management, (2018)

K. Azadeh, R. de Koster, D. Roy, Robotized and Automated Warehouse Systems: Developments and Research Opportunities, Transportation Science (2018)

K. Azadeh, D. Roy, R. de Koster, Design, Modeling, and Analysis of Vertical Robotic Storage and Retrieval Systems, Transportation Science (2018)

E. Tappia, D. Roy, R. de Koster, M. Melacini, Integrated Storage-order Picking Systems: Technology, Performance Models, and Design Insights, European Journal of Operational Research (2018)

D. Roy, S. Nigam, R. de Koster, I. Adan, and J. Resing, Robot-Storage Zone Assignment Strategies in Mobile Fulfillment Systems, Transportation Research Part E: Logistics and Transportation Review (2018)

D. Roy, and V. Ravikumaran, An Extensive Evaluation of CONWIP-Card Controlled and Scheduled Start Time Based Production System Designs, Journal of Manufacturing Systems (2018)

V. Dhingra, D. Roy, and R. de Koster, A Cooperative Quay Crane-based Stochastic Model to Estimate Vessel Handling Time, Flexible Services and Manufacturing, 29(1), 97–124 (2017)

E. Tappia D. Roy, R. de Koster, M. Melacini, Modeling, Analysis, and Design Insights for Compact Storage Systems with Autonomous Shuttles, Transportation Science, 51:1 , 269-295 (2017)

N Mishra, D Roy, Jan-Kees van Ommeren, A Stochastic model for inter-terminal container transportation, Transportation Science, 51(1) , 67-87 (2017)

T. Lamballais, D. Roy, R. de Koster. Estimating Performance in a Mobile Fulfillment System. European Journal of Operational Research, 256(3), 976–990 (2017)

J. de Vries, R. de Koster, S. Rijsdijk, D. Roy. Determinants of Safe and Productive Truck Driving: Empirical Evidence from Long-haul Cargo Transport, Transportation Research Part E: Logistics and Transportation Review, 97, 113–131 (2017)

A. Gupta, D. Roy, R. de Koster, and S. Parhi, Optimal Stack Layout in a Sea Container Terminal with Automated Lifting Vehicles, International Journal of Production Research, 55(13), 3747-3765 (2017)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg, A Multi-tier Linking Approach to Analyze Performance of Autonomous Vehicle-based Storage and Retrieval Systems, Computers & Operations Research, 83, 173-188 (2017)

S. Saini, D. Roy, and R. de Koster, A Stochastic Model for the Throughput Analysis of Passing Dual Yard Cranes, Computers & Operations Research, 87, 40-51 (2017)

D. Roy, Carrano, A.L., Pazour, J.A., and Gupta, A., Cost-effective pallet management strategies, Transportation Research Part E: Logistics and Transportation Review, 93 (September): 358-371 (2016)

V. Dhingra, D. Roy, and R. de Koster, A Cooperative Quay Crane-based Stochastic Model to Estimate Vessel Handling Time, Flexible Services and Manufacturing, 29(1), 97–124 (2017)

E. Tappia D. Roy, R. de Koster, M. Melacini, Modeling, Analysis, and Design Insights for Compact Storage Systems with Autonomous Shuttles, Transportation Science, 51:1 , 269-295 (2017)

N Mishra, D Roy, Jan-Kees van Ommeren, A Stochastic model for inter-terminal container transportation, Transportation Science, 51(1) 67-87 (2017)

T. Lamballais, D. Roy, R. de Koster. Estimating Performance in a Mobile Fulfillment System. European Journal of Operational Research, 256(3), 976–990 (2017)

J. de Vries, R. de Koster, S. Rijsdijk, D. Roy. Determinants of Safe and Productive Truck Driving: Empirical Evidence from Long-haul Cargo Transport, Transportation Research Part E: Logistics and Transportation Review, 97, 113–131 (2017)

A. Gupta, D. Roy, R. de Koster, and S. Parhi, Optimal Stack Layout in a Sea Container Terminal with Automated Lifting Vehicles, International Journal of Production Research, 55(13), 3747-3765 (2017)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg, A Multi-tier Linking Approach to Analyze Performance of Autonomous Vehicle-based Storage and Retrieval Systems, Computers & Operations Research, 83, 173-188 (2017)

S. Saini, D. Roy, and R. de Koster, A Stochastic Model for the Throughput Analysis of Passing Dual Yard Cranes, Computers & Operations Research, 87, 40-51 (2017)

D. Roy, A. Bandyopadhyay, and P. Banerjee, A Nested Semi-Open Queuing Network Model for Analyzing Dine-in Restaurant Performance, Computers & Operations Research, 65, 29–41 (2016)

F. Tornese, A. Carrano, J. Pazour, B. Thorn, D. Roy, Carbon footprint analysis of pallet remanufacturing, Journal of Cleaner Production, 126, 630–642 (2016)

D. Roy, Carrano, A.L., Pazour, J.A., and Gupta, A., Cost-effective pallet management strategies, Transportation Research Part E: Logistics and Transportation Review, 93 (September): 358-371 (2016)

A. H. Gharehgozli, D. Roy, R. de Koster. Sea Container Terminals: New Technologies and OR Models, Maritime Economics and Logistics, 18(2): 103-140 (2016).

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. A Simulation Study of Blocking Effects in Warehouse Systems with Autonomous Vehicles, European Journal of Industrial Engineering, 10(1), 51 - 80 (2016).

D. Roy, Semi-open Queuing Networks: A Review of Stochastic Models, Solution Methods, and New Research Areas, International Journal of Production Research, 54(6) 1735-1752, (2016).

D. Roy; A. Gupta, R. de Koster, A Non-linear Traffic-flow based Queuing Model to
Estimate Container Terminal Throughput with AGVs, International Journal of Production Research, 54(2), 472-493, (2016).

D. Roy, A. Bandyopadhyay, and P. Banerjee, A Nested Semi-Open Queuing Network Model for Analyzing Dine-in Restaurant Performance, Computers & Operations Research, 65, 29–41 (2016)

F. Tornese, A. Carrano, J. Pazour, B. Thorn, D. Roy, Carbon footprint analysis of pallet remanufacturing, Journal of Cleaner Production, 126, 630–642 (2016)

A. Gupta, D. Roy, and J.A. Pazour, Estimating Waiting Time Probabilities in a Network of GI/G/c Queues with Application in Service Systems, International journal on Automation and Logistics,1 (2), 150 - 175 (2015).

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Stochastic Models for Unit-Load Operations in Warehouse Systems with Autonomous Vehicles, Annals of OR, 231(1), 129–155 (2015).

A.L. Carrano, J. A Pazour, D. Roy, and B.K. Thorn, Selection of Pallet Management Strategies Based on Carbon-equivalent Emissions Impact, International Journal of Production Economics, 164 (June): 258-270 (2015)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Queuing Models to Analyze Dwell-point and Cross-aisle Location in Autonomous Vehicle-based Warehouse Systems, European Journal of Operational Research, 242 (1): 72–87 (2015).

J.A. Pazour and D. Roy , Analyzing rental vehicle threshold policies that consider expected waiting times for two customer classes, Computers and Industrial Engineering, 80: 80-96, (2015).

V. Dhingra and D. Roy, Modeling Emergency Evacuation with Time and Resource Constraints: A Case Study from Gujarat, Socio-Economic Planning Sciences, 51(September): 23-33 (2015)

A. Kumar, D. Roy, and M.K. Tiwari. Optimal partitioning of vertical zones in vehicle-based warehouse systems, International Journal of Production Research, 52(5), 1285-1305, (2014)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Blocking Effects in Warehouse Systems with Autonomous Vehicles, IEEE Transactions on Automation Science and Engineering, 11 (2), 439 – 451 (2014).

D. Roy, J.A. Pazour, and R. de Koster. A Novel Approach for Designing Rental Vehicle Repositioning Strategies, IIE Transactions, 46:9, 948-967 (2014).

D. Roy and N.R.S. Raghavan. A Constrained Nash Bargaining Approach to the Stock Rationing Problem in Multi-echelon Supply Chains, The International Journal of Advanced Manufacturing Technology, 72(5-8), 571-587 (2014).

M. Gorman, J.P. Clarke, A. Gharehgozli, M. Hewitt, R. de Koster, and D. Roy, State of the Practice: Application of OR/MS in Freight Transportation, Interfaces, 44(6): 535 – 554, (2014).

D. Roy, J. Sebastian, and D. Sharma, Fleet Sizing for Transporters with Seasonal Demands, International journal on Automation and Logistics, 1(1), 105 – 115 (2013)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Performance Analysis and Design Tradeoffs in Warehouses with Autonomous Vehicle Technology, IIE Transactions. 44 (12): 1045-1060 (2012)

N. A. Duffie, D. Roy and L. Shi. Dynamic Behavior of Autonomous Work Systems in Production Networks with Local Capacity Control. Annals of the CIRP, 57 (1): 463-466 (2008)

N.R.S. Raghavan and D. Roy. A Stochastic Petri Net Approach for Inventory Rationing in Multi-Echelon Supply Chains. Journal of Heuristics, 11(5-6): 421-446 (2005)

D. Roy, U.M.B.S. Sarma, S.K. Mukhopadhyay and M.K. Tiwari. A Part Classification System Using a Shape-Analysis Based Heuristic Approach. The International Journal of Advanced Manufacturing Technology, 21(5): 355-364 (2003)

M. K. Tiwari and D. Roy. Solving a Part Classification Problem using Simulated Annealing-like Hybrid Algorithm. Robotics and Computer-Integrated Manufacturing, 19(5): 415-424 (2003)

M.K. Tiwari and D. Roy. Application of an Evolutionary Fuzzy System for the Estimation of Workforce Deployment and Cross training in an Assembly Environment. International Journal of Production Research, 40(18): 4651-4674 (2002)

M. K. Tiwari and D. Roy. Minimization of Internal Shrinkage in Casting using Synthesis of Neural Networks. International Journal of Smart Engineering System Design, 4(3): 205-214 (2002)

D. Roy, G. Raghuram, R. Jain, S. Tripathi, K. Sharda, Trucking Business Management: Cases and Concepts, Mc-GrawHill Publications, 2016. (Revised in 2018 with additional cases and chapters)

Cases

Vasant Farm Fresh: Reducing Food Wastage

Raymond: Design of Warehouse Operations

Kunvarji Group

K M Trans Logistics: Workshop Operations

Chartered Speed and the Bus Rapid Transit System

Agarwal Packers and Movers Limited

D. Roy and R. de Koster. Optimal Stack Layout Configurations at Automated Container Terminals using Queuing Network Models, Springer Handbook on Container Terminal Handling, Forthcoming.

D. Roy and V. Bansal, An Integrated Network Modeling Framework for Analysis of Multi-line Order Pick Systems, International Material Handling Colloquium, July 23-27, 2018, Savannah, GA, USA

D. Roy and H. Joshi, Evaluating Transaction Pairing Strategies for Vehicle-based High-density Storage Systems, International Material Handling Colloquium, June 12-14, 2016, Kalsruhe, Germany

T. Lamballais, D. Roy, and R. de Koster, A novel approach to analyze inventory allocation decisions in Robotic Mobile Fulfillment Systems, International Material Handling Colloquium, June 12-14, 2016, Kalsruhe, Germany

Shobhit Nigam, Debjit Roy, René de Koster, Ivo Adan, "Analysis of Class-based Storage Strategies for the Mobile Shelf-based Order Pick System", Accepted for publication in the Progress of 13th Material Handling Research, 2014, Editors: Andres Carrano, René de Koster, Benoit Montreuil, Kevin Gue, Michael Ogle, Jeff Smith

V. Dhingra, D. Roy, and R. de Koster, A Two-level Stochastic Model to Estimate Vessel Sojourn Time, Accepted for publication in the Progress of 13th Material Handling Research, 2014, Editors: Andres Carrano, René de Koster, Benoit Montreuil, Kevin Gue, Michael Ogle, Jeff Smith

A. Krishnamurthy, D. Roy, and S. Bhat. Performance Trade-offs in Layouts for Relief Centers. International Material Handling Research Colloquium, Gardanne, France, 25 - 28 June 2012.

D. Roy and R. de Koster. Optimal Design of Container Terminal Layout, International Material Handling Research Colloquium, Gardanne, France, 25 - 28 June 2012.

A. Krishnamurthy, D. Roy and S. Bhat. Performance Trade-offs in Layouts for Distribution of Supplies at Relief Centers, Humanitarian & Relief logistics: Research issues, case studies and future trends, published by Springer under the Series Operations Research/ Computer Science (ORCS). (Accepted October 2012)

A. Krishnamurthy, D. Roy, S.S. Heragu and C.J. Malmborg. Blocking Effects on Performance of Warehouse Systems with Autonomous Vehicles. Proceedings of the 11th International Material Handling Research Colloquium (IMHRC), Milwaukee, WI, USA, June 21-25, 2010.

A. Prabu, A. Vakharia, D. Roy, P. Venkateshan, Capacity Decisions in an e-Hailing Platform, POM Conference 2019

D. Roy, E. Belavina, N. Kallus, K. Girotra, A Predictive- Prescriptive Model for Food Allocation, , POM Conference 2019

K. Azadeh, D. Roy, R. De Koster, Dynamic Order Pick Strategies in a Human-Robot Collaborative Environment, POM Conference 2019

J. De Vries, D.Roy, Operational Restaurant Policies and Customer Behavior, POM Conference 2019

G. L. Kumawat, D. Roy, F. Papier, Dynamic Capacity Allocation Under Lost Sales and Service Dependent Demand, Informs Annual Meeting 2019, Seattle

D. Roy, E. Belavina, N. Kallus, K. Girotra, A Predictive-prescriptive Model For Food Allocation, Informs Annual Meeting 2019, Seattle

Y. Dong, R. de Koster, D. Roy, Y. Yu, Dynamic Customer Allocation and Charging Policies For Shared Autonomous Electric Vehicles, Informs Annual Meeting 2019, Seattle

V. Bansal, D. Roy, Stochastic Model for Integrated Storage-Order Picking System with Multi-Line Orders, Informs Annual Meeting 2019, Seattle

A. Roy, D. Roy, Designing Service Systems in the Age of Yelp: Incorporating Reviews in Queueing Decisions, Informs Annual Meeting 2019, Seattle

D. Roy, Keynote Talk, Trucking Business in India: Supply Chain Challenges and Research Insights, 6th International Workshop on Sustainable Road Freight, 5th December, 2019, University of Cambridge, 2019

A. Sobhanan, G.L. Kumawat, D. Roy, and S. Krishnamoorthy, Dynamic allocation of e-commerce orders to order-fulfilment centres with due date constraints, 52nd Annual Convention of ORSI & International Conference, IIM Ahmedabad, December 15-18, 2019

D. Roy, Modeling parallel resource movements in intra-logistics systems, 1st 1st National Conference on Operations Management and Logistics (OML), 12-13 April 2018

A. Gharehgozli, D. Roy, A Mixed Tactical and Operational Framework for Landside Container Terminal Operations, , POM Conference, , Houston, TX 4-7 May 2018

J. de Vries, D. Roy, R. de Koster, Operational Restaurant Policies and Customer Behavior, POM Conference, , Houston, TX 4-7 May 2018

A. Prabu PM, D. Roy, P. Venkateshan, Refuse or Accept? Analysis of Taxi Driver Operating Strategies in E-hailing Platforms, POM Conference, , Houston, TX 4-7 May 2018

D. Roy, E. Belavina, Food Distribution and Food Waste in Food for Education Programs, INFORMS Annual Meeting, Houston, TX 22-25 October 2017.

D. Roy, Jan-Kees van Ommeren, A. Gharehgozli, Modeling Service Priority at Landside Terminal Resources: Exact Analysis and Approximations, INFORMS Annual Meeting, Houston, TX 22-25 October 2017.

K. Azadeh, D. Roy, R. de Koster, Design Challenges and Performance Analysis of the AGV-pick System, INFORMS Annual Meeting, Houston, TX 22-25 October 2017.

D. Roy, G. Kumawat, Modeling Parallel Process Flows in Intra-logistics Systems, INFORMS Annual Meeting, Houston, TX 22-25 October 2017.

D. Roy, Integrated order picking systems for e-commerce fulfilment: Technology, performance models, and design insights, ISB – POMS Workshop, ISB Campus Hyderabad, 14-15 December 2017

D. Roy, S. Saini, R. de Koster, Role of transaction type and mix on dual yard cranes performance, 8th International Scientific Symposium on Logistics, June 15-16, 2016, Kalsruhe Germany

T. Lamballais, D. Roy, and R. de Koster, A novel approach to analyze inventory allocation decisions in Robotic Mobile Fulfillment Systems, 8th International Scientific Symposium on Logistics, June 15-16, 2016, Kalsruhe Germany

K. Azadeh, D. Roy, and R. de Koster, Design Challenges and Performance Analysis of the Vertical Robotic Storage and Retrieval System, 5th INFORMS Transportation Science and Logistics Society Workshop, June 19-22, 2016, font:16px open sans Tech

D. Roy, J. Pazour, and V. Dhingra, Batching Decisions for E-Commerce Order Fulfilment: Technology, Models, and Data Insights, 5th INFORMS Transportation Science and Logistics Society Workshop, June 19-22, 2016, font:16px open sans Tech

J. de Vries, R. de Koster, S. Rijsdijk, D. Roy. Which Drivers Should Transport Your Cargo? Empirical Evidence from Long-Haul Transport. POM 27th Annual Conference, Orlando, FL May 6-9 2016

D. Roy, Jan-Kees Van Ommeren, A. Gharehgozli, Loading And Unloading Trains And Trucks At Container Terminals. INFORMS Annual Meeting, Nashville, TN 12-16 October 2016

D. Roy and V. Dhingra, Analysis of Static vs. Dynamic Batching in Order-pick Operations 18th CEMS Saint-Louis Workshop on Logistics and Supply Chain Management, taking place on April 30, 2015 Saint-Louis University in Brussels.

D. Roy and V. Dhingra, Performance Analysis of Warehouse Systems with Dynamic Batching, 15th IFAC Symposium on Information Control Problems in Manufacturing, May 11-13, 2015, Ottawa Convention Centre, Ottawa, Canada

N. Kumar, R.P. Agrahari, and D. Roy, Review of Green Supply Chain Processes, 15th IFAC Symposium on Information Control Problems in Manufacturing, May 11-13, 2015, Ottawa Convention Centre, Ottawa, Canada

D. Roy and A. Raman, An Analytical Modeling Framework for Determining the Optimal Table Mix in Restaurants, 15th IFAC Symposium on Information Control Problems in Manufacturing, May 11-13, 2015, Ottawa Convention Centre, Ottawa, Canada

Jan-Kees van Ommeren, N. Baer, N. Mishra, D. Roy, "Batch Service Systems with Heterogeneous Servers", First European Conference on Queueing Theory , Ghent, August 20-22, 2014

K.S. Duisters, D. Roy, I.J.B.F. Adan, "An Efficient Analytical Approach for Estimating Throughput in Sea Container Terminals, 27 August 2014 - 29 August 2014

R. de Koster, D. Roy, V. Dhingra, "Effect of Quay and Stack Crane Service Time Variability on Vessel Sojourn Times", The 2014 International Conference on Logistics and Maritime Systems, "Smart Future Logistics", 27 August 2014 - 29 August 2014

N. Mishra, D. Roy, J. K. Van Ommeren, A Stochastic Model for Inter-terminal Container Transportation, The 2014 International Conference on Logistics and Maritime Systems, "Smart Future Logistics", 27 August 2014 - 29 August 2014

D. Roy and D. Ghosh, Rethinking Facility Logistics: Technology, Models, and Insights, IIMA Society Conference 2014, June 27-28, 2014

S. Nigam and D. Roy. Analyzing Alternate Storage Strategies in Mobile Rack-Based Order-Pick System. 3rd IIMA International Conference on Advanced Data Analysis, Business Analytics and Intelligence, IIM Ahmedabad, April 13 - 14, 2013, Ahmedabad, India

J.A. Pazour and D. Roy, Modeling Priority Service and Repositioning Strategies, IIE Annual Conference 2013, Puerto Rico, May 18-22 2013

D. Roy and R. de Koster, Optimizing stack layouts in container terminals using stochastic models, National University of Singapore, 3rd International Conference on Logistics and Maritime Systems, 12-14 September 2013

S. Nigam, D. Roy and R. de Koster, Analyzing Alternate Vehicle Allocation Strategies in Mobile Rack-based Order-pick Systems, OR13 conference, Erasmus University, The Netherlands, 3-6 September 2013

Roy, D., and Nigam, S., (2013). Queuing Models for Mobile Rack-based Order-pick Systems.INFORMS Annual Meeting, Minneapolis, 6-9 October 2013.

Roy, D., and Kumar, A., (2013). Optimal Partitioning of Vertical Zones in Vehicle-based Warehouse System. INFORMS Annual Meeting, Minneapolis, 6-9 October 2013.

Roy, D., and Gupta, A., (2013). Traffic Flow-based Analytical Model for Fleet and Buffer Sizing at Sea Container Terminals. INFORMS Annual Meeting, Minneapolis, 6-9 October 2013.

Mishra, N., Roy, D., and van Ommeren, J., (2013). Queuing Approximations for the Inter-terminal Container Transportation (ITT) Problem. INFORMS Annual Meeting, Minneapolis, 6-9 October 2013.

D. Roy and R. de Koster. Joint Modeling of Loading and Unloading Operations at a Container Terminal. International Conference on Logistics and Maritime Systems (LOGMS), University of Bremen Germany from August 22-24 2012.

D. Roy and R. de Koster. Design Insights for Container Terminal Operations, POMS, Chicago, IL, April 20-23 2012.

D. Roy and R. de Koster. Modeling Overlapping Container Terminal Operations, INFORMS, Phoenix, AZ, October 14-17 2012.

A. Gupta and D. Roy. Estimating Waiting Time Probabilities in a Network of Queues with Stationary Arrival Rates" in the "XVI Annual International Conference of Society of Operations Management" at IIT Delhi, December 22-23 December, 2012.

D. Roy, J.A. Pazour, and R. de Koster. Design of repositioning policies to maximize rental profits, POMS World Conference, Amsterdam, July 1-5, 2012.

D. Roy and A. Krishnamurthy. Stochastic Models of AVS/RS with Vertical Conveyors. INFORMS, Charlotte, NC, November 13 - 16 2011.

D. Roy and A. Krishnamurthy. Improving Throughput Capacity in Multi-tier Warehouses with Autonomous Vehicles. Proceedings of the 2011 Industrial Engineering Research Conference, Reno, NV, USA, May 21-25, 2011.

D. Roy and A. Krishnamurthy. Queuing Models for Unit-Load Warehouse Systems using Autonomous Vehicles. Proceedings of the 8th Stochastic Models of Manufacturing and Service Operations Conference, Kuşadasi, İzmir, Turkey, May 28-June 2, 2011.

D. Roy and A. Krishnamurthy. Performance Analysis of Unit-load Transfer Systems in Multi-Tier Warehouses with Autonomous Vehicles. Proceedings of the 44th CIRP Conference on Manufacturing Systems, Madison, WI, USA, June 1-3, 2011.

D. Roy and A. Krishnamurthy. Analyzing Flexible Design Configurations in Autonomous Vehicles-based Warehouses. INFORMS, Austin, TX, November 7-10, 2010.

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Vehicle Interference Effects in Warehousing Systems with Autonomous Vehicles. Proceedings of IEEE Conference on Automation Science and Engineering, Toronto, Canada, August 21-24, 2010.

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Effect of Cross-aisle and Zoning on Performance of an Autonomous Vehicles-based Storage and Retrieval System. POMS, Orlando, FL, May 1-4, 2009.

D. Roy and K. Brown. MCT: Map Your Lead Times - See the Opportunities. Proceedings of 9th International Conference on Quick Response Manufacturing, Madison, WI, June 14-16, 2009.

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Design Insights for an Autonomous Vehicles-based Storage and Retrieval System. 23rd European Conference on Operational Research, Bonn, Germany, July 5 - 8, 2009.

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Vehicle Interference Effects in Autonomous Vehicles based Warehousing Systems. INFORMS, San Diego, CA, October 11-14, 2009.

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Impact of zones on Throughput and Cycle Times in Warehouses with Autonomous Vehicles and Retrieval System, Proceedings of IEEE Conference on Automation Science and Engineering, Bangalore, India, August 22-25, 2009.

A. Krishnamurthy, D. Roy, S.S. Heragu and C.J. Malmborg. Design and Operational Insights for Autonomous Vehicle based Storage and Retrieval Systems, Proceedings of the 2009 International Conference on Value Chain Sustainability, Louisville, KY, USA, October 19-21, 2009.

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Design Insights for Warehouses based on Autonomous Vehicle Technology (Extended Abstract), Proceedings of the 2009 M&SOM Conference, Boston, MA, USA, June 28-30, 2009.

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Design Insights for an Autonomous Vehicles-based Storage and Retrieval System. Proceedings of the 2009 Industrial Engineering Research Conference, Miami, FL, USA, May 30-June 3, 2009.

D. Roy and A. Krishnamurthy. Performance Analysis of Alternate Designs for Autonomous Vehicle based Storage and Retrieval Systems. INFORMS, Washington, DC, October 12-15, 2008.

D. Roy and N.R.S. Raghavan. A Nash Bargaining Solution to the Supply Rationing Problem, Proceedings of International Conference on Energy, Automation and Information Technology, IIT, Kharagpur, India, December 8-12, 2001.

U.M.B.S. Sarma, D. Roy, U.P.S Bhushan, M.K. Tiwari, and R. Shankar. Resolving Complexities of Synchronization Issues of a Supply Chain using Simulated Annealing Based Six Sigma Constrained Approach, Proceedings of First Global Conference on Flexible System Management, New Delhi, India, December 17-20, 2000.

D. Roy, M.K. Tiwari, R.K. Ohdar and R. Shankar. Evaluation of Supplier Performance: An Approach Based on Evolutionary Fuzzy Systems, Proceedings of First Global Conference on Flexible System Management, New Delhi, India, December 17-20, 2000.

M.K. Tiwari, S.K. Tiwari, D. Roy, N.K. Vidyarthi, S.Kameshwaran, A Genetic Algorithm Based Approach to Solve Process Plan Selection Problems, Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials, Honolulu, HI , USA, July 10-15 1999.

'Design of Service System':

iTunes: https://podcasts.apple.com/in/podcast/prof-debjit-roy-associate-professor-in-operations-management/id1297918661?i=1000408988462
SoundCloud: https://soundcloud.com/iimapodcast/prof-debjit-roy-associate-professor-in-operations-management-discusses-design-of-service-systems

'Upstream Challenges in Trucking Supply Chain':

iTunes: https://podcasts.apple.com/in/podcast/prof-debjit-roy-talks-about-upstream-challenges-in/id1297918661?i=1000464431923
SoundCloud: https://soundcloud.com/iimapodcast/prof-debjit-roy-talks-about-upstream-challenges-in-trucking-supply-chain

Working Papers & Projects

K. Azadeh, D. Roy, R. de Koster, Dynamic Human-Robot Collaborative Picking Strategies (submitted)

V. Bansal and D. Roy, Stochastic Modeling of Multi-line Orders in Integrated Storage-Order Picking System (submitted)

D. Roy, Jan-Kees van Ommeren, R. de Koster, A. Gharehgozli, Effect of service priority and resource synchronization choices on landside terminal queues: Exact analysis and approximations (submitted)

D. Roy and J. De Vries, Rejection is a challenge: Leveraging customer segmentation in restaurant reservations to boost revenue (submitted)

G. L. Kumawat and D. Roy, A new solution method for linking multi-stage semi-open queuing networks: An application in robotized compact storage system, (submitted)

T. Lamballais, M. Merschformann, D. Roy, L. Suhl, R. de Koster, Dynamic Policies for Resource Reallocation in a Robotic Mobile Fulfillment System with Time-Varying Demand (submitted)

G. Dutta, D. Roy, R. Kumar, S.R. Natesan, and S. Jayaswal, Efficient Distribution of Compressed Natural Gas for Sabarmati Gas Limited Fueling Stations in Gujarat, India with Simulation (submitted)

A. Prabu PM, D. Roy, P. Venkateshan, Refuse or Accept? Analysis of Taxi Driver Operating Strategies in E-hailing Platforms (submitted)

V. Bansal, D. Roy; J. Pazour,, Batching Decisions for E-Commerce Order Fulfillment: Technology, Models, and Data Insights, (under revision)

Integrated Order Picking Systems for E-Commerce Fulfillment: Technology, Performance Models, and Design Insights, University of Arizona

Analysis of Taxi-Driver Operating Strategies in E-hailing Platforms, VU Amsterdam and RSM, Supply Chain Department Seminar

Batching strategies for eCommerce order fulfillment, University of North Texas and Business School
Indian Institute of Management Bangalore

Design and Modeling of container terminals.
SmartPort Centre, Erasmus University,
Department Seminar, Department of Technology and Innovation, Rotterdam School of Management,
Department Seminar, Industrial Engineering and Management, Oklahoma State University.

Improving throughput capacity in multi-tier systems with autonomous vehicles.
Kühne Logistics University, The KLU,
University of Groningen,
TU Eindhoven, Industrial Engineering and Innovation Sciences,
EURANDOM, Eindhoven, Stochastics seminar,
TU Delft, 3ME,
ERIM seminar, Rotterdam School of Management.

Design insights for warehouse systems using autonomous vehicle technology.
IIM Calcutta,
IIM Ahmedabad,
IISc Bangalore,
Material Handling Forum, Rotterdam School of Management,
IIM Indore,
IIT Bombay.

Logistics Management: Trends and Opportunities.
Ahmedabad Custom House Agents Association, Knowledge Session,
Gujarat Statistical conference,
Logistics Conference on Logistics infrastructure & Make in India, Gujarat Chamber Building, Ahmedabad.

How to do relevant research and publish in top tier journals?, Indian Institute of Management, Indore.

D. Roy, Improvement Strategies to Cut Lead Times, UPKRAM, April-June 2012, 19-25.

D. Roy. Aging Baby Boomers: Workforce Challenges and Ergonomic Solutions for Order Picking Operations, 2011. (Awarded first prize in Wunsch technical paper writing contest, College of Engineering, University of Wisconsin-Madison)

D. Roy. Magic Shelves: Boosting E-retail Sales by Reducing Order Picking Inefficiencies, 2010. (Awarded first prize in Wunsch technical paper writing contest, College of Engineering, University of Wisconsin-Madison)

D. Roy. Autonomous Vehicle Technology: Meeting the Order Fulfillment Challenge of the Future Warehouse by Offering Greater Flexibility and Increased Responsiveness, 2009. (Awarded first prize in Wunsch technical paper writing contest, College of Engineering, University of Wisconsin-Madison)

D. Roy. Comparison of Six Sigma and Quick Response Manufacturing: Select the Best Tool for Lead time Reduction, 2006. (Technical Report, Center for Quick Response Manufacturing, University of Wisconsin-Madison-Madison)

Consulting

Training/Consulting, Food Corporation of India, KFC India, Mahindra Trucks and Buses Limited, Shipping, Kunvarji Group, March 2012-Present

Research Assistant, Center for Quick Response Manufacturing, University of Wisconsin-Madison, January 2006 – July 2011

Risk Manager, GE Consumer Finance, Stamford, Connecticut, USA , January 2005-December 2005

Six Sigma Black Belt, General Electric, Analytic Center of Excellence, Bangalore, India, July 2003 - December 2004

Business Analyst, General Electric, Analytic Center of Excellence, Bangalore, India, January 2002 - June 2003

Awards & Honors

2002 - GE Six Sigma Green Belt Certification

2002 - Customer Award from GE Rail Car Services, Chicago, IL for exemplary performance

2004 - GE Train the Trainer Certification

2005 - GE Six Sigma Black Belt Certification

1999 - Young Engineering Fellowship Award for academic excellence

2002 - Prof. B.G. Raghavendra Medal for the best Master's thesis in Operations Research

2008 - Vinod K. and J. Gail Sahney Scholarship for academic excellence

2009-2010 - AS/RS Product Section Honor Scholarship

2009 - Wunsch Material Handling First Prize for the best paper on Material Handling Topics

2010 - Wunsch Material Handling First Prize for the best paper on Material Handling

2010-2011 - Tiffin Metal Products Honor Scholarship

2011 - Wunsch Material Handling First Prize for the best paper on Material Handling

2011 - Best IIE Annual Conference Paper Award in Facility Logistics Track

2013 - Amity Academic Excellence Award for contributions to Production and Quantitative Management

2016 - Listed as a Subject Matter Expert in Decision Sciences Area in Research productivity in management schools of India during 1968-2015: A directional benefit-of-doubt model analysis, Omega, 2016, http://dx.doi.org/10.1016/j.omega.2016.02.004.

2016 - Honorable Mention designation in the IIE Transactions Focused Issue on Design and Manufacturing Best Applications Paper Award Competition

2018 - The IIMA Alumni VVEF Outstanding Researcher Award, awarded on the 53rd IIMA convocation

2017, 2018 - High Performing Research Member

2019 - Invited as an inaugural speaker in the Logistics & Supply Chain track of the IISE annual conference

2019 - Best IISE Annual Conference Paper Award in Facilities Design and Planning Track

2019 - Honorable Mention for the Jack Meredith Best Paper Award

2019 - RSM Innovative Teaching Award

2020 - The IIMA Alumni VVEF Outstanding Researcher Award awarded on the 55th IIMA convocation

2020 - InsideIIM Professor of the Year

Faculty & Research

Debjit Roy

Debjit Roy

Biography

Area

Contact

Education

Teaching

Research Area

Academic Experience

Professional Experience

Funded Research Projects

Social Interactions: Increases or Diminishes Productivity (Amount: INR 200000), IIMA Seed grant, 2018

Green Design to Green Disposal (Partner University: Sheffield University Management School, The University of Sheffield, Conduit Road, Sheffield S10 1FL, UK.) (IIM Ahmedabad portion, INR 2200000), UKIERI UGC Thematic Awards-UGC-2013-14/067

Stochastic Modeling and Design Insights for Container Terminal Operations (Amount: INR 190000), Status: Complete

Improving throughout Capacity in Distribution Warehouses Using Variants of Vehicle-based Technologies (Amount: INR 190000), Status: Complete

Closed-Loop Inventory Models for the Pallet Supply Chains (Amount: INR 248500), Status: Complete

Estimating Vessel Sojourn Times in Unloading Operations at Sea Container Terminals (Amount: INR 248000), Status: Complete

Stochastic Modeling of Restaurant Operations (Amount: INR 248000), Status: Ongoing

Modeling Landside Operations in a Container Terminal with Non-stationary Arrivals(Amount: INR 248000), Status: Ongoing

Data Driven E-Commerce Order Fulfillment (Partner University: TU Eindhoven) Estimated amount: 500,000 Euro (to be shared), Indo-Dutch Grant

Journals

Jan-Kees van Ommeren, Niek Baer, Nishant Mishra, and Debjit Roy, Batch service systems with heterogeneous servers, Queueing Systems and Applications (2020)

G. L. Kumawat, D. Roy, R. de Koster, I.J.B.F. (Ivo) Adan, Stochastic Modelling of Parallel Process Flows in Intra-logistics Systems with an Application to a Container Terminal, European Journal of Operational Research (2020)

G. L. Kumawat and D. Roy, AGV or Lift-AGV? Performance Trade-offs and Design Insights for Container Terminals with Robotized Transport Vehicle Technology, IISE Transactions (2020)

T. Lamballais, D. Roy, R. de Koster, Inventory Allocation in Robotic Mobile Fulfillment Systems, IISE Transactions (2019)

D. Roy, R. de Koster, R. Bekker, Modeling and design of container terminal operations, Operations Research (2019)

A. Kumar, D. Roy, V. Verter, and D. Sharma, Integrated Fleet Mix and Routing Decision for Hazmat Transportation: A Developing Country Perspective, European Journal of Operational Research, 264(1), 225-238 (2018)

F. Tornese , J. A. Pazour, B. K. Thorn , D. Roy, A. L. Carrano, Investigating the environmental and economic impact of loading conditions and repositioning strategies for pallet pooling providers, Journal of Cleaner Production, 172, 155-168 (2018)

A. Kumar, D. Roy, V. Verter, and D. Sharma, Integrated Fleet Mix and Routing Decision for Hazmat Transportation: A Developing Country Perspective, European Journal of Operational Research, 264(1), 225-238 (2018)

D. Roy and R. de Koster, Stochastic Modeling of Unloading and Loading Operations at a Container Terminal using Automated Lifting Vehicles, European Journal of Operational Research, 266(3), 895-910, (2018)

V. Dhingra, G. Kumawat, D. Roy, and R. de Koster, Solving Semi-open Queuing Networks with Time-varying Arrivals: An Application in Container Terminal Landside Operations, European Journal of Operational Research, 267(3), 855-876 (2018)

S. S. Mofidi, J. Pazour, and D. Roy, Proactive vs. Reactive Order-Fulfillment Resource Allocation for Sea-based Logistics, Transportation Research Part E: Logistics and Transportation Review, 114, 66-84, (2018)

J. de Vries, D. Roy, R. de Koster, Worth the wait? How restaurant waiting time influences customer behavior and revenue, Journal of Operations Management, (2018)

K. Azadeh, R. de Koster, D. Roy, Robotized and Automated Warehouse Systems: Developments and Research Opportunities, Transportation Science (2018)

K. Azadeh, D. Roy, R. de Koster, Design, Modeling, and Analysis of Vertical Robotic Storage and Retrieval Systems, Transportation Science (2018)

E. Tappia, D. Roy, R. de Koster, M. Melacini, Integrated Storage-order Picking Systems: Technology, Performance Models, and Design Insights, European Journal of Operational Research (2018)

D. Roy, S. Nigam, R. de Koster, I. Adan, and J. Resing, Robot-Storage Zone Assignment Strategies in Mobile Fulfillment Systems, Transportation Research Part E: Logistics and Transportation Review (2018)

D. Roy, and V. Ravikumaran, An Extensive Evaluation of CONWIP-Card Controlled and Scheduled Start Time Based Production System Designs, Journal of Manufacturing Systems (2018)

V. Dhingra, D. Roy, and R. de Koster, A Cooperative Quay Crane-based Stochastic Model to Estimate Vessel Handling Time, Flexible Services and Manufacturing, 29(1), 97–124 (2017)

E. Tappia D. Roy, R. de Koster, M. Melacini, Modeling, Analysis, and Design Insights for Compact Storage Systems with Autonomous Shuttles, Transportation Science, 51:1 , 269-295 (2017)

N Mishra, D Roy, Jan-Kees van Ommeren, A Stochastic model for inter-terminal container transportation, Transportation Science, 51(1) , 67-87 (2017)

T. Lamballais, D. Roy, R. de Koster. Estimating Performance in a Mobile Fulfillment System. European Journal of Operational Research, 256(3), 976–990 (2017)

J. de Vries, R. de Koster, S. Rijsdijk, D. Roy. Determinants of Safe and Productive Truck Driving: Empirical Evidence from Long-haul Cargo Transport, Transportation Research Part E: Logistics and Transportation Review, 97, 113–131 (2017)

A. Gupta, D. Roy, R. de Koster, and S. Parhi, Optimal Stack Layout in a Sea Container Terminal with Automated Lifting Vehicles, International Journal of Production Research, 55(13), 3747-3765 (2017)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg, A Multi-tier Linking Approach to Analyze Performance of Autonomous Vehicle-based Storage and Retrieval Systems, Computers & Operations Research, 83, 173-188 (2017)

S. Saini, D. Roy, and R. de Koster, A Stochastic Model for the Throughput Analysis of Passing Dual Yard Cranes, Computers & Operations Research, 87, 40-51 (2017)

D. Roy, Carrano, A.L., Pazour, J.A., and Gupta, A., Cost-effective pallet management strategies, Transportation Research Part E: Logistics and Transportation Review, 93 (September): 358-371 (2016)

V. Dhingra, D. Roy, and R. de Koster, A Cooperative Quay Crane-based Stochastic Model to Estimate Vessel Handling Time, Flexible Services and Manufacturing, 29(1), 97–124 (2017)

E. Tappia D. Roy, R. de Koster, M. Melacini, Modeling, Analysis, and Design Insights for Compact Storage Systems with Autonomous Shuttles, Transportation Science, 51:1 , 269-295 (2017)

N Mishra, D Roy, Jan-Kees van Ommeren, A Stochastic model for inter-terminal container transportation, Transportation Science, 51(1) 67-87 (2017)

T. Lamballais, D. Roy, R. de Koster. Estimating Performance in a Mobile Fulfillment System. European Journal of Operational Research, 256(3), 976–990 (2017)

J. de Vries, R. de Koster, S. Rijsdijk, D. Roy. Determinants of Safe and Productive Truck Driving: Empirical Evidence from Long-haul Cargo Transport, Transportation Research Part E: Logistics and Transportation Review, 97, 113–131 (2017)

A. Gupta, D. Roy, R. de Koster, and S. Parhi, Optimal Stack Layout in a Sea Container Terminal with Automated Lifting Vehicles, International Journal of Production Research, 55(13), 3747-3765 (2017)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg, A Multi-tier Linking Approach to Analyze Performance of Autonomous Vehicle-based Storage and Retrieval Systems, Computers & Operations Research, 83, 173-188 (2017)

S. Saini, D. Roy, and R. de Koster, A Stochastic Model for the Throughput Analysis of Passing Dual Yard Cranes, Computers & Operations Research, 87, 40-51 (2017)

D. Roy, A. Bandyopadhyay, and P. Banerjee, A Nested Semi-Open Queuing Network Model for Analyzing Dine-in Restaurant Performance, Computers & Operations Research, 65, 29–41 (2016)

F. Tornese, A. Carrano, J. Pazour, B. Thorn, D. Roy, Carbon footprint analysis of pallet remanufacturing, Journal of Cleaner Production, 126, 630–642 (2016)

D. Roy, Carrano, A.L., Pazour, J.A., and Gupta, A., Cost-effective pallet management strategies, Transportation Research Part E: Logistics and Transportation Review, 93 (September): 358-371 (2016)

A. H. Gharehgozli, D. Roy, R. de Koster. Sea Container Terminals: New Technologies and OR Models, Maritime Economics and Logistics, 18(2): 103-140 (2016).

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. A Simulation Study of Blocking Effects in Warehouse Systems with Autonomous Vehicles, European Journal of Industrial Engineering, 10(1), 51 - 80 (2016).

D. Roy, Semi-open Queuing Networks: A Review of Stochastic Models, Solution Methods, and New Research Areas, International Journal of Production Research, 54(6) 1735-1752, (2016).

D. Roy; A. Gupta, R. de Koster, A Non-linear Traffic-flow based Queuing Model to Estimate Container Terminal Throughput with AGVs, International Journal of Production Research, 54(2), 472-493, (2016).

D. Roy, A. Bandyopadhyay, and P. Banerjee, A Nested Semi-Open Queuing Network Model for Analyzing Dine-in Restaurant Performance, Computers & Operations Research, 65, 29–41 (2016)

F. Tornese, A. Carrano, J. Pazour, B. Thorn, D. Roy, Carbon footprint analysis of pallet remanufacturing, Journal of Cleaner Production, 126, 630–642 (2016)

A. Gupta, D. Roy, and J.A. Pazour, Estimating Waiting Time Probabilities in a Network of GI/G/c Queues with Application in Service Systems, International journal on Automation and Logistics,1 (2), 150 - 175 (2015).

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Stochastic Models for Unit-Load Operations in Warehouse Systems with Autonomous Vehicles, Annals of OR, 231(1), 129–155 (2015).

A.L. Carrano, J. A Pazour, D. Roy, and B.K. Thorn, Selection of Pallet Management Strategies Based on Carbon-equivalent Emissions Impact, International Journal of Production Economics, 164 (June): 258-270 (2015)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Queuing Models to Analyze Dwell-point and Cross-aisle Location in Autonomous Vehicle-based Warehouse Systems, European Journal of Operational Research, 242 (1): 72–87 (2015).

J.A. Pazour and D. Roy , Analyzing rental vehicle threshold policies that consider expected waiting times for two customer classes, Computers and Industrial Engineering, 80: 80-96, (2015).

V. Dhingra and D. Roy, Modeling Emergency Evacuation with Time and Resource Constraints: A Case Study from Gujarat, Socio-Economic Planning Sciences, 51(September): 23-33 (2015)

A. Kumar, D. Roy, and M.K. Tiwari. Optimal partitioning of vertical zones in vehicle-based warehouse systems, International Journal of Production Research, 52(5), 1285-1305, (2014)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Blocking Effects in Warehouse Systems with Autonomous Vehicles, IEEE Transactions on Automation Science and Engineering, 11 (2), 439 – 451 (2014).

D. Roy, J.A. Pazour, and R. de Koster. A Novel Approach for Designing Rental Vehicle Repositioning Strategies, IIE Transactions, 46:9, 948-967 (2014).

D. Roy and N.R.S. Raghavan. A Constrained Nash Bargaining Approach to the Stock Rationing Problem in Multi-echelon Supply Chains, The International Journal of Advanced Manufacturing Technology, 72(5-8), 571-587 (2014).

M. Gorman, J.P. Clarke, A. Gharehgozli, M. Hewitt, R. de Koster, and D. Roy, State of the Practice: Application of OR/MS in Freight Transportation, Interfaces, 44(6): 535 – 554, (2014).

D. Roy, J. Sebastian, and D. Sharma, Fleet Sizing for Transporters with Seasonal Demands, International journal on Automation and Logistics, 1(1), 105 – 115 (2013)

D. Roy, A. Krishnamurthy, S.S. Heragu and C.J. Malmborg. Performance Analysis and Design Tradeoffs in Warehouses with Autonomous Vehicle Technology, IIE Transactions. 44 (12): 1045-1060 (2012)

N. A. Duffie, D. Roy and L. Shi. Dynamic Behavior of Autonomous Work Systems in Production Networks with Local Capacity Control. Annals of the CIRP, 57 (1): 463-466 (2008)

N.R.S. Raghavan and D. Roy. A Stochastic Petri Net Approach for Inventory Rationing in Multi-Echelon Supply Chains. Journal of Heuristics, 11(5-6): 421-446 (2005)

D. Roy; A. Gupta, R. de Koster, A Non-linear Traffic-flow based Queuing Model to
Estimate Container Terminal Throughput with AGVs, International Journal of Production Research, 54(2), 472-493, (2016).