The purpose of a kinetic model of a biosensor is to identify the key experimental factors (such as the rates of reactions, rates of mass transport, loading of the bio-recognition component, etc.), which determine the response, or output, of the sensor and to then provide a link between these key experimental factors and the concentration of the analyte and the sensor response. Thus, modeling provides a mathematical description of the physical processes occurring within the system. By applying kinetic modeling to enzyme electrodes and biosensors, we can derive a number of advantages. It is clear that several different kinetic processes are involved in the overall functioning of any enzyme electrode or biosensor.