An aircraft mission computing system includes an aircraft mission path computing engine, and a mission deck comprising a display and a display management assembly configured for displaying, on the display, at least one button for defining an operational specification of the mission. The computing engine is configured to be activated after defining the choice of operational specification using the definition button to determine at least one possible path of the aircraft based on the or each choice of defined operational specification using the or each definition button. The display management assembly is configured to display, on the display, after the activation of the computing engine, at least one outcome indicator providing mission feasibility information while respecting the or each operational specification choice.