Combination of a heuristic and simulation approach for route evaluation in order picking in a distribution center
Copyright (c) 2024 Investigación e Innovación en Ingenierías
This work is licensed under a Creative Commons Attribution 4.0 International License.
- Articles
- Submited: July 8, 2023
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Published: July 18, 2024
Abstract
Objective: This study focuses on the optimization of order picking in distribution centers (DC), a task that involves significant time, labor, and costs. Methodology: A mathematical model based on mixed integer linear programming (MILP) was used to minimize the total distance traveled during order picking. This model was applied to a Colombian case and complemented with a simulation model to evaluate improvement scenarios. Results: The mathematical model generated four optimal routes for order picking. Two of the routes used S-shaped routing, one used return routing, and another combined both policies, thus reducing the total distance by 5% to complete the order-picking process. Subsequently, the simulation model was used to evaluate three improvement scenarios: i) increasing the capacity of the picking carts, ii) increasing the number of picking carts, and iii) increasing both parameters simultaneously. Conclusions: The best result was obtained by increasing the capacity of the picking carts by 33%, which reduced the distance traveled by 49.5% and had a positive impact on other defined operational indicators. This innovative combined approach to the routing problem can be used to explore further improvements.
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