Multi-objective assignment strategy for warehouses served by automatic storage and retrieval system

Storage assignment strategies play a crucial role to increase the warehouse efficiency and to reduce the inbound logistic costs. This paper presents a linear programming model to optimise the load assignment within an Automated Storage and Retrieval System (AS/RS) adopting a multi-objective perspective. Three different issues are considered: the time efficiency for the S/R operations; the overall energy consumption for the S/R activities; and the risk of the rack overturn and collapse during dangers like seismic events. The model is applied to a realistic case study to demonstrate its effectiveness and strengths.