Abstract
To cope with current turbulent market demands, robust multi-echelon inventory policies are needed for distribution networks in order to lower inventory costs as well as to maintain high responsiveness. This paper analyzes the inventory policies in the context of complex distribution networks and proposes a new integrated approach to robust multi-echelon inventory policy decision, which is composed of three interrelated components: an analytical inventory policy optimisation, a supply chain simulation module and a metaheuristic-based inventory policy optimiser. Based on the existing approximation algorithms designed primarily for two-echelon inventory policy optimisation, an analytical multi-echelon inventory model in combination with an efficient optimisation algorithm has been designed. Through systematic parameter adjustment, an initial generation of optimised multi-echelon inventory policies is calculated. To evaluate optimality and robustness of these multi-echelon inventory policies under market dynamics, they are automatically handed over to a simulation module, which is capable of modeling arbitrary complexity and uncertainties within and outside of a supply chain and simulating them under respective scenarios. Based on the simulation results, i.e. the robustness of the proposed strategies, a metaheuristic-based inventory policy optimiser regenerates improved (more robust) multi-echelon inventory policies, which are once again dynamically evaluated through simulation. This closed feedback loop forms a simulation optimisation process that enables the autonomous evolution of robust multi-echelon inventory policies. The proposed approach has further been validated by an industrial case study, in which favorable outcomes have been obtained.
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Klingebiel, K., Li, C. (2012). An Integrated Approach to Robust Multi-echelon Inventory Policy Decision. In: Byrski, A., Oplatková, Z., Carvalho, M., Kisiel-Dorohinicki, M. (eds) Advances in Intelligent Modelling and Simulation. Studies in Computational Intelligence, vol 416. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28888-3_7
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