Patent ID: 8423432

Claim:
A computer-implemented method, comprising: for each particular item of a plurality of items in inventory of a materials handling facility: determining, by one or more computer processors a plurality of identifiers for the particular item, wherein said plurality of identifiers are electronically obtained from a unit of the particular item during operations of the materials handling facility; for each of said plurality of identifiers, determining, by one or more computer processors, a respective quantity of instances in which that identifier was electronically obtained from a plurality of given units of the particular item, wherein a different respective quantity of instances is determined for each identifier; and based on a statistical analysis of said quantities, determining, by one or more computer processors, one of said plurality of identifiers as being an authoritative identifier for the particular item; updating, by one or more computer processors, an item identifier record of the item to reflect the determined identifier as the authoritative identifier of the item; and identifying, by one or more computer processors, a particular unit as being a unit of a particular item of said plurality of items based on a comparison of an identifier electronically obtained from said particular unit and said item identifier record.