Fleet sizing of laser guided vehicles and pallet shuttles in automated warehouses

Andrea Ferrara, Elisa Gebennini and Andrea Grassi

International Journal of Production Economics, 2014, vol. 157, issue C, 7-14

Abstract: The paper deals with emerging automation technologies for pallet handling in warehouses characterized by multiple-depth rack storage systems. In particular, this study addresses the adoption of Pallet Shuttles (PSs) for material handling within the rack structure, i.e., for put-away and retrieval operations from the rack face to the specific pallet location and vice versa. PSs are used in combination with Laser Guided Vehicles (LGVs) so as to obtain a fully automated warehousing system. The study develops an analytical model for the joint LGV–PS fleet sizing problem, also taking into consideration stochastic phenomena and queueing implications. This enables the analyst to compute the utilization of LGVs and PSs as a function of sizes of the two fleets. Then, a queueing model can be applied to estimate the cycle time of the orders in the warehousing system. An example to clarify the application of the method is also provided.

Keywords: Warehouse automation; Multiple-depth rack; Laser Guided Vehicle (LGV); AGV; Pallet shuttle; Queueing theory (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:proeco:v:157:y:2014:i:c:p:7-14

DOI: 10.1016/j.ijpe.2014.06.008

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