Abstract
A mathematical model is an important instrument used to get information on the attitude of a system. The mathematical models can be used to have a basic knowledge about the working of a system, lowering product costs and improving performance. In this paper, it is stated that the behavior of the system can be better understood by using biologically meaningful parameters in mathematical models. Mathematical models can be divided into two classes as empirical and mechanical models. Since the parameters not biologically menaningful in empirical models, the importance of converting these models to mechanical models containing biologically meaningful parameters has been expressed. The purpose of this manuscript is related to how Wood model widely used in lactation is converted into the model with the biologically meaningful parameters, time to maximum milk production, maximum milk production reached at time to maximum milk production and time to inflection point. For this aim, all the steps of the conversions were given stepwise.