a method and system for screening out empirically data collected from various steps of a technical process operating based on a first set of parameters , by utilizing a screening algorithm to reduce the size of the empirical data set , thus improving the modeling and revising of the technical process . the algorithm utilizes various classes associated with the empirical values and within each class performs an assessment with respect to preselected threshold values . the algorithm also performs an assessment with respect to another preselected threshold value , for the class as a whole .