Browsing Journal Articles by Author "Roy, Debjit"
Now showing items 21-40 of 55
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Investigating the environmental and economic impact of loading conditions and repositioning strategies for pallet pooling providers
Roy, Debjit; Tornese, Fabiana; Pazour, Jennifer A.; Thorn, Brian K.; Carrano, Andres L. (Elsevier, 2018-01-20)Pallets are fundamental assets critical to worldwide supply chain logistics. This research develops models for closed-loop pallet pooling providers to understand the environmental and economic impact of customer ... -
Loading and unloading trains at the landside of container terminals
Roy, Debjit; Gharehgozli, Amir; Saini, Suruchika; Ommeren, Jan-Kees van (Springer, 2022-02-25)We study the operational problem of loading and unloading trains at a container terminal. Trains are served by two gantry cranes which spread over multiple trains on parallel tracks at the terminal landside. Multiple ... -
Modeling emergency evacuation with time and resource constraints: a case study from Gujarat
Roy, Debjit; Dhingra, Vibhuti (Elsevier Ltd, 2015)This study develops an off-site emergency response plan for a nuclear power plant in Gujarat, India subject to time constraints with resource limitations and risk of radiation exposure to victims. We formulate an optimization ... -
Modeling landside container terminal queues: Exact analysis and approximations
Roy, Debjit; Ommeren, Jan-Kees van; Koster, René de; Gharehgozli, Amir (Elsevier, 2022-06-07)With the growth of ocean transport and with increasing vessel sizes, managing congestion at the landside of container terminals has become a major challenge. The landside of a sea terminal handles containers that arrive ... -
Modelling driver's reactive strategies in e-hailing platforms: an agent-based simulation model and an approximate analytical model
Maruthasalam, Arulanantha Prabu Ponnachiyur; Roy, Debjit; Venkateshan, Prahalad (Taylor & Francis, 2021-10-26)For an e-hailing taxi operation, we analyse a driver's profit-maximising reactive strategy (to either accept or refuse a ride request) in response to the ride request broadcast by the platform. We analyse four operating ... -
A multi-tier linking approach to analyze performance of autonomous vehicle-based storage and retrieval systems
Roy, Debjit; Krishnamurthy, Ananth; Heragu, Sunderesh S.; Malmborg, Charles (Elsevier Ltd, 2017-06-23)To improve operational flexibility, throughput capacity, and responsiveness in order fulfillment operations, several distribution centers are implementing autonomous vehicle-based storage and retrieval system (AVS/RS) in ... -
A nested semi-open queuing network model for analyzing dine-in restaurant performance
Roy, Debjit; Bandyopadhyay, Arindam; Banerjee, Pritam (Elsevier Ltd, 2016)Low customer wait times at restaurants can improve both customer walk-ins and satisfaction levels. To manage customer wait times, the operators need a thorough understanding of how restaurant design parameters such as the ... -
A new solution approach for multi-stage semi-open queuing networks: an application in shuttle-based compact storage systems
Kumawat, Govind Lal; Roy, Debjit (Computers & Operations Research, 2020-08-20)Multi-stage semi-open queuing networks (SOQNs) are widely used to analyze the performance of multi-stage manufacturing systems and automated warehousing systems. While there are several methods available for solving ... -
A non-linear traffic flow-based queuing model to estimate container terminal throughput with AGVs
Roy, Debjit; Gupta, Akash; Koster, Rene B.M, De (Taylor & Francis, 2016)Efficient handling of containers at a terminal can reduce the overall vessel sojourn times and minimise operational costs. The internal transport of containers in these terminals is performed by vehicles that share a common ... -
A novel approach for designing rental vehicle repositioning strategies
Roy, Debjit; Pazour, Jennifer A.; De Koster, Rene (IIE Transactions, 2014)An important tactical decision for vehicle rental providers is the design of a repositioning strategy to balance vehicle utilization with customer wait times due to vehicle unavailabilities. To address this problem, this ... -
Optimal partitioning of vertical zones in vehicle-based warehouse systems
Kumar, Anand; Roy, Debjit; Tiwari, M.K. (International Journal of Production Research, 2014)New innovations in warehouse automation systems such as autonomous vehicle-based storage and retrieval (AVS/R) system offer greater flexibility and responsiveness in processing unit-load storage and retrieval transactions ... -
Optimal stack layout in a sea container terminal with automated lifting vehicles
Roy, Debjit; Parhi, Sampanna; Gupta, Akash; Parhi, Sampanna (Taylor and Francis Ltd., 2017)Container terminal performance is largely determined by its design decisions, which include the number and type of quay cranes, stack cranes, transport vehicles, vehicle travel path and stack layout. We investigate the ... -
Performance analysis of batching decisions in waveless order release environments for e-commerce stock-to-picker order fulfillment
Bansal, Vishal; Roy, Debjit; Pazour, Jennifer A (International Transactions in Operational Research, 2020-12-14)Warehouse automation is increasingly adopted to manage throughput fluctuations in e-commerce order fulfillment. This work develops queuing network models and solution methodologies for performance analysis of a stock-to-picker ... -
Performance evaluation and optimization of design parameters for electric vehicle-sharing platforms by considering vehicle dynamics
Bansal, Vishal; Kumar, Deepak Prakash; Roy, Debjit; Subramanian, Shankar C. (Elsevier, 2022-09-21)Global adoption of electric vehicles (EVs) faces many challenges such as range anxiety, high cost of EVs, and inadequate charging infrastructure. EV-sharing platforms resolve such concerns by setting up an optimal configuration ... -
A prescriptive analytics framework for efficient E-commerce order delivery
Kandula, Shanthan; Krishnamoorthy, Srikumar; Roy, Debjit (Elsevier, 2021-04-30)Achieving timely last-mile order delivery is often the most challenging part of an e-commerce order fulfillment. Effective management of last-mile operations can result in significant cost savings and lead to increased ... -
Proactive vs. reactive order-fulfillment resource allocation for sea-based logistics
Roy, Debjit; Shahab Mofidi, Seyed; Pazour, Jennifer A. (Elsevier pvt Ltd., 2018-06)We study proactive and reactive sea-based order-fulfillment decisions for a set of SKUs. In such systems, a proactive strategy may be more costly than a reactive strategy and variable marginal costs change with respect ... -
Queuing models to analyze dwell-point and cross-aisle location in autonomous vehicle-based warehouse systems
Roy, Debjit; Ananth, Krishnamurthy; Sunderesh, Heragu; Charles, Malmborg (Elsevier, 2015)Technological innovations in warehouse automation systems, such as Autonomous Vehicle based Storage and Retrieval System (AVS/RS), are geared towards achieving greater operational efficiency and flexibility that would be ... -
Queuing models to analyze dwell-point and cross-aisle location in autonomous vehicle-based warehouse systems
Roy, Debjit; Krishnamurthy, Ananth; Heragu, Sunderesh; Malmborg, Charles (European Journal of Operational Research, 2015)Technological innovations in warehouse automation systems, such as Autonomous Vehicle based Storage and Retrieval System (AVS/RS), are geared towards achieving greater operational efficiency and flexibility that would be ... -
Review of green supply chain processes
Kumar, Niraj; Agrahari, Ravi P.; Roy, Debjit (IFAC-PapersOnLine, 2015)In the last few decades, environmental concerns of manufacturing operations have motivated the organisations to implement green principles in different processes of the supply chain. In this paper, literature in green ... -
Robot-storage zone assignment strategies in mobile fulfillment systems
Roy, Debjit; Nigam, Shobhit; Koster, Rene de; Adan, Ivon; Resing, Jacques (Elsevier, 2019-02)The robotic mobile fulfillment system (MFS) is widely used for automating storage pick and pack activities in e-commerce distribution centers. In this system, the items are stored on movable storage shelves, also known as ...