The Dematic Multishuttle “Roaming” format meets the needs of low to medium throughput applications while providing maximum flexibility. In roaming format, the shuttles are not dedicated to one storage level but can move between different levels via shuttle lifts. As throughput requirements increase, the system can be expanded with additional shuttles. The performance of a conventional automatic storage and retrieval system can be equalled with just a few shuttles. Dematic Multishuttle roaming can be used in virtually any building structure.