1. A computer system for valuation and simulation of revised navigation procedures, said computer system comprising: at least one database comprising required navigation performance data relating to flight operations and customer airline operation; a modeling program, said modeling program configured to build an aerospace value model from said at least one database of required navigation performance data; a software program configured to: utilize the aerospace value model to generate at least one revised navigation procedure, and at least one cost savings item associated with the revised navigation procedure; and monitor the revised navigation procedure and to alert deviation of the revised navigation procedure from the required navigation performance data; a flight simulation program operable to demonstrate the revised navigation procedure for illustration of the at least one cost savings item; and a user interface configured to display outputs of said flight simulation program.