This paper addresses the development of an average value based model for the processing system. The continuous observation of that process variable, fixation of its average value on real time basis, mathematical model development of above average value as base factor are the basic steps of this method, which subsequently leads to time based dynamics. The validation of the models developed by this method is done through experiments. The method is tested by taking two types of systems: one a biological system and second an electrical distribution system. The process variables selected are the angular displacement for biological system and rms value of current for electrical systems. The simulated results of the model agree with that of experimental reading in both cases within tolerable limits.