Inventory system with efficient operator handling of inventory items

A non-transitory computer-readable medium having computer-executable instructions stored thereon,

• wherein the instructions, when executed, cause a computer system having at least one computer processor to perform a method comprising:
• instructing movement of a plurality of receipt receptacles from a shipping vehicle to a plurality of case shuttles without separating or sorting inventory items contained in the receipt receptacles;
• for each receipt receptacle of the plurality of receipt receptacles, obtaining information regarding inventory items contained in the receipt receptacle;
• assigning a particular receipt receptacle to a floor of an inventory system based at least in part on information about the floor of the inventory system and the obtained information regarding inventory items contained in the particular receipt receptacle, the inventory system comprising a plurality of floors disposed vertically relative to each other, and each floor configured to operate substantially independently of other floors;
• and
• instructing movement, using a mobile drive unit, of the case shuttle bearing the particular receipt receptacle to a storage location on the floor to which the particular receipt receptacle is assigned.