1. A diagnostic method for determining deviations of an evolutionary process, comprising the steps of: measuring a plurality of physical parameters characteristic of the evolutionary process; calculating from the measured plurality of physical parameters a current state of the evolutionary process and a corresponding reference state of the evolutionary process; first comparing the current state and the reference state physical parameter by physical parameter to generate relative differences between the current state and reference state for each parameter; categorizing each parameter into one of a plurality of categories indicating a relevance of each parameter to a respective deviation in the evolutionary process; determining for each respective deviation the relative difference between the current state and the reference state parameter by parameter which generate the respective deviation; and diagnosing each respective deviation based on the category of each parameter and the parameter by parameter determined relative differences between the current state and the reference state which generate the respective deviation.