Corporate mail and parcel operations can use the same automation technology the U.S. Postal Services uses to make sure sort schemes hit the mark, as detailed in the latest Official Mail Guide.
Whether processing outgoing or incoming mail/packages, barcoding/sorting systems are the principle means for automation. Accuracy is guaranteed through sophisticated technology that sorts mail and packages based on the information contained in barcodes on each piece.
Here are technology links for sorting systems in the OMG:
Here are the company pages of sorting system providers: