Energy minimizing order picker forklift routing problem

Date

2022-01-01

Author

Atashi Khoei, Arsham
Süral, Haldun
Tural, Mustafa Kemal

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The material handling systems used in warehouses involve important operations such as the usage of order picker forklifts. These order picker forklifts provide efficient utilization of the storage space by their ability in moving in narrow aisles and picking items from high level racks. Routing the order picker forklifts to pick ordered items belongs to the operational decision level and is done in high frequency. Therefore, finding an energy-efficient route for an order picker forklift can yield significant savings in the energy consumption in warehouses and the resulting CO2 emission. In this paper, we introduce and study the energy minimizing order picker forklift routing problem (EMFRP) which aims to find an energy-efficient route for an order picker forklift to pick a given list of items. To our knowledge, this is the first study that considers the order picker forklifts in the context of the order picking problem. We calculate the forklift's energy consumption in both horizontal and vertical moves considering the effects of friction forces, the acceleration and deceleration of the forklift, and its load. A mixed integer programming formulation and a dynamic programming approach are developed to solve small size instances of the EMFRP exactly. To solve larger instances, we provide tour construction and tour improvement heuristics and integrate them into a single solution approach. Computational results show that the proposed heuristic approach finds high quality solutions. Moreover, it is observed that significant energy savings can be achieved by solving the EMFRP instead of the classical distance minimization problem.

Subject Keywords

Energy saving, Green warehousing, Logistics, Material handling, Order picker routing problem

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85137827969&origin=inward
https://hdl.handle.net/11511/101474

Journal

European Journal of Operational Research

DOI

https://doi.org/10.1016/j.ejor.2022.08.038

Collections

Department of Industrial Engineering, Article

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Citation Formats

A. Atashi Khoei, H. Süral, and M. K. Tural, “Energy minimizing order picker forklift routing problem,” European Journal of Operational Research, pp. 0–0, 2022, Accessed: 00, 2023. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85137827969&origin=inward.