Patent ID: 8326452

Claim:
A system, comprising: a processor; and a memory comprising program instructions, wherein the program instructions are executable by the processor to: receive from a stow and sortation station of a materials handling facility, wherein the stow and sortation station comprises a plurality of locations for stowing collections of items previously picked from inventory storage of the materials handling facility to fulfill a plurality of orders, information associating collections of items with particular locations of the stow and sortation station to which the collections of items are stowed, wherein each collection is separately picked from the inventory storage prior to arriving at the stow and sortation station and includes one or more units of items picked from the inventory storage of the materials handling facility to fulfill one or more of a plurality of orders, wherein at least one of the collections includes items picked for two or more different orders and at least one of the collections includes two or more heterogeneous items; detect that all units of items for particular orders are stowed at locations of the stow and sortation station; initiate picks for the particular orders at the stow and sortation station in response to said detection; and direct the picking of units of items for the particular orders from the plurality of locations and the placement of the picked units into order receptacles corresponding to the particular orders in response to said detection.