Our Sort Allocation Computer provides functions to process bags from Check-In through to aircraft delivery in accordance with IATA resolution 1755 processes.

One of the main functions of the HLC is to make sorting decisions for bags identified at key points within the system. 

The sorting is achieved by attaching a Bag Tag printed with a unique 10-digit barcode (License Plate) to each bag when a bag is checked in. The License Plate number is allocated by the airline’s Departure Control System (DCS).

A bag sort decision is usually requested by the PLC system that controls the mechanical handling equipment (sorters, conveyors, pushers, ploughs etc.) when a bag is identified at a decision point in the system. The PLC provides a bag ID to the HLC which then makes a sort decision.

The HLC receives prior information about the bag, including its License Plate, fight number, destination and passenger class. This information is in the form of a BSM (Bag Source Message). 

The HLC contains a flight schedule, which can be manually entered or received electronically via the Active Flight Update Service (AFUS.) 

The operator sets up a sort plan within the HLC, which defines how bags for a particular flight are to be segregated and sorted.