Abstract: In an embodiment, a method includes receiving flight data related to an aircraft that includes an engine installed therein. The flight data includes values of an engine parameter. The method also includes determining values of a measured installation delta for the engine based, at least in part, on the flight data. The method also includes determining values of a measured power parameter for the engine based, at least in part, on the flight data. The method also includes generating a mathematical model of a plurality of installation deltas for the engine as a function of the engine parameter, where the plurality of installation deltas include the measured installation delta and an unmeasured installation delta. The method also includes validating the mathematical model based, at least in part, on the values of the measured installation delta. The method also includes generating a performance profile of the engine.