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This paper presents a concept which is needed to warrant a highest possible degree of situation awareness of the flight crew as well as a workload level which is as close as possible to the satisfactory one. This concept offers the solution to counteract susceptibiliy to pilot errors, typical for lack of attention or knowledge limitations in certain flight situations. This concept is founded on cognitive system engineering in order to really accomplish allocation of automation as a complement to the human pilot crew when needed in favor of flight safety and mission effectiveness. This technology enables a cockpit design in order to systematically comply with the requirements of ’ Human-Centered Automation (HCA)’ . It even allows to quantify at which degree these requirements are met. The underlying approach behind the concept has become real by the development of the cockpit assistant system prototype family CASSY/CAMA as described in this paper.