Abstract: An order processing system includes a plurality of robotic devices, a set of storage systems, an order consolidation system, and a control server. The control server receives a set of orders for an item, determines a cumulative order quantity of the item, and selects a subset of the set of orders to be opened up for consolidation at the order consolidation system. The control server identifies one the storage systems that stores the item as per the cumulative order quantity and assigns the storage system to an operator station for batch picking of the cumulative order quantity. The control server controls a first robotic device to transport the storage system to the operator station, and a second robotic device to collect from the operator station a first portion of the cumulative order quantity and transfer the first portion to a set of order bins associated with the subset of orders.