A method is provided for supporting maintenance of a fleet of vehicles with intuitive display of repair analytics. The method includes receiving a user request for repair analytics for the fleet of vehicles via a GUI that includes a first frame with a date-range filter to enable the user to select a date range for the repair analytics. The method includes interpreting the user request to produce a query of dataset(s) for the fleet, and executing the query for data of the vehicles. The datasets include an in-service time and repair costs for the vehicles, and the data includes the same over the date range. The method includes determining, and generating a chart in a second frame of the GUI that graphically illustrates, a moving average repair cost per unit of in-service time for a plurality of time periods within the date range from the in-service time and repair costs.