Abstract

A data processing system is disclosed which tracks each client's cumulative travel usage over time for the purpose of authorizing travel requests and ensuring a predetermined minimum return on an initial investment base. Such variables as frequency of use and level of service (i.e., first class, coach, etc.) are translated into cumulative cost figures which are carefully tracked and compared with a "travel ceiling." This ceiling is actually a constantly varying reference base line of maximum expanditures/usage available to the client at any given time to stay on course to achieve an expected return on the initial investment. The air travel related data is stored in uniquely formatted client account files which may be readily accessed and displayed. The data processing system's ability to track many travel related conditions is enhanced by a unique set of control status words which control software flow and which are utilized to visually flag important status conditions.