Fulfillment guidance devices, systems, and methods

Fulfillment guidance devices, systems, and methods are disclosed herein. An example device includes a memory; a communications interface; and a processor to: obtain, from a location tracking system deployed in a facility containing items of a plurality of item types, current locations for each of the items; select a subset of the items having a common type, and satisfying a proximity criterion; generate and store, in the memory, an item cluster definition having a type indicator corresponding to the common type, a count of items in the subset, and a single cluster location derived from the current locations of the items in the subset; obtain an item request including one of the item types; determine that the one of the item types matches the type indicator of the cluster definition; responsive to the determination, send at least a portion of the cluster definition to a mobile device within the facility.