Definition of user-centric air traffic efficiency indicators

State of the art and gap analysis of current indicators to measure flight efficiency. Analyze the possible refinements which can be implemented to include the use of the advanced knowledge and multiple sources of information in order to obtain a set of enhanced efficiency indicators. Definition of new possible indicators which can measure the flight efficiency in a better way the HFE is currently measuring it. The definition of those indicators will be based on the different data source combination, figuring out which of the provided data is needed to define each indicator.