Evolutionary multiobjective optimization of the multi-location transshipment problem

Details Evolutionary multiobjective optimization of the multi-location transshipment problem Evolutionary multiobjective optimization of the multi-location transshipment problem

2011-02-08

arxiv.org/abs/1102.1536v1

Operational Research 8, 2 (2008) 167-183

Computer Science

Artificial Intelligence

Scientific paper

10.1007/s12351-008-0015-5

We consider a multi-location inventory system where inventory choices at each location are centrally coordinated. Lateral transshipments are allowed as recourse actions within the same echelon in the inventory system to reduce costs and improve service level. However, this transshipment process usually causes undesirable lead times. In this paper, we propose a multiobjective model of the multi-location transshipment problem which addresses optimizing three conflicting objectives: (1) minimizing the aggregate expected cost, (2) maximizing the expected fill rate, and (3) minimizing the expected transshipment lead times. We apply an evolutionary multiobjective optimization approach using the strength Pareto evolutionary algorithm (SPEA2), to approximate the optimal Pareto front. Simulation with a wide choice of model parameters shows the different trades-off between the conflicting objectives.

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