1. A method for monitoring an output from an image forming device, comprising: inputting a plurality of images formed by an image forming device; measuring an image quality parameter for each of the plurality of input images; assigning an image quality parameter value and an identifier for the measured image quality parameters; storing the assigned image quality parameter values and identifiers as a collection; fitting a plurality of models to the collection by determining values of fit parameters for each of the models that relate to the collection; determining a single best fit model from among the plurality of models based on a best fit to the collection; determining a current modeled image quality parameter for the image forming device based on the best fit model; and outputting the current modeled image quality parameter.