1. A system for quantifying baseline model quality, comprising: an engine service database containing engine data; a preprocessor for processing the engine data into a predetermined format; an engine baseline modeling component that builds an engine baseline model from the preprocessed data, wherein the engine baseline model relates engine performance variables as a function of engine operating conditions; and a model diagnostics component that evaluates the performance of the engine baseline model, wherein the model diagnostics component includes: means for comparing engine data from a plurality of engines against the engine baseline model; means for generating engine trends for each of the plurality of engines; means for identifying correlations between the engine trends and various parameters; and means for calculating, for each identified correlation, summary statistics relating to the degree of correlation.