Abstract
An automatic storage system comprised of two storage carousel conveyors and a retrieval apparatus integrated by computers has been considered in this paper. The order picking problem for such a two-carousel-single server system is presented here. The retrieval time is analyzed by a two-stage solution procedure for the scheduling sequence of retrieving items from the system in order to satisfy an order requirement. The analytical results can be directly applied for the scheduling of the carousel storage system. © 1993 Taylor & Francis Group, LLC.