1. A method for identifying variations in aircraft operational parameters, comprising: processing a four-dimensional (4D) aircraft trajectory for a flight along a defined route; determining an aircraft intent corresponding to the flight along the defined route based at least in part on an aircraft performance model from a trajectory predictor, wherein the aircraft intent comprises a plurality of segments and a corresponding plurality of intent parameters; adjusting the plurality of intent parameters such that a computed 4D trajectory substantially corresponds to the 4D aircraft trajectory, wherein the computed 4D trajectory is determined based at least in part on the aircraft intent, the adjusted plurality of intent parameters, and the aircraft performance model from the trajectory predictor; determining a computed operational parameter based at least in part on the computed 4D trajectory and the aircraft performance model from the trajectory predictor; and identifying variations between the computed operational parameter and a corresponding measured operational parameter.