Abstract
Recently, SBS / RS system has been widely used and studied. This paper presents a mathematical model of travel time and cost for shuttle based storage and retrieve systems (SBS/RS), through which we can decide the optimized configuration and picking efficiency of the warehouse. By considering the operating characteristics, such as acceleration and deceleration and assuming that the storage units are uniform distributed and using probability theory, we obtain a time and cost function for a dual command storage and retrieve procedure. Finally, we validate our analysis by numerical examples and sensitivity analysis. The results show that the optimal configuration and efficiency of the warehouse are mainly affected by several key indicators, such as the width of each storage unit, the height of each shelf, etc.
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