Shuttle-based or robotic compact storage and retrieval system?

Abstract

This study investigates and compares the performance of shuttle-based storage and retrieval (SBS/RS) and robotic compact storage and retrieval systems (RCS/RS). SBS/RS, featuring lifts and shuttles, excel in high-speed storage and retrieval, achieving significant throughput efficiencies, particularly in high-demand scenarios. In contrast, RCS/RS enable high storage densities. The performance evaluation is based on existing analytical models, which integrate cycle time models and queueing theory. Results indicate that SBS/RS outperforms RCS/RS, particularly in smaller systems. However, with a low number of vehicles, RCS/RS demonstrates superior performance. These insights assist in selecting the appropriate system based on specific operational requirements.