A Pilot assistance system is an integrated and on-board system, where all required functions under a single human machine interface take place. Since now, the assistance systems have been designed to solve individual tasks, but this approach is reaching its limits, because of the continuous growth of civil air traffic as well as the new air traffic management procedures which put new demands on the services of the aircrews. Pilot assistance systems help the cabin crew to maintain a high level of safety in air traffic. To facilitate the required increase of capacity in the following years, these kind of systems in manned vehicles will be introduced and are analised in this project. The other main objective of the project is to focus on the decision making process of the actions. It is crucial for aviation safety, especially in critical situations (when the aircrew is facing technical problems) then the logic, the priority and the principles of the processes will be also studied. Finally, a practical demonstration for a display for one scenario will be given as an example. In the cockpit display, the information will allow the pilot to easily monitor and get a better vision of the aerial traffic surroundings, improving the security and the efficiency of the flight operations.