ABSTRACT
Due to the worldwide growth in airspace utilization, including the expansion and diversity of military operations, airspace control systems have been increasing their technical complexity, introducing new features into the existent automation or creating additional resources for the automation of some functions previously performed by human operators. Therefore, the dependence on the availability of the computer systems involved in the services provided by control centers has increased. Project directives and operational procedures are established in order to maintain the safety integrity levels, in case of any degraded operation event, while availability remains as a critical parameter to the efficiency of the operation services provided by the centers.
