The analytical and economic-mathematical foundations of applied use of the category «functional effectiveness» of agribusiness and matrix of determinacy of separate factors of the specified functions, which in their complex analysis characterize features of the organizational activities, are designed. The methodical approach to the typology of behavioral models of agrarian business, taking into account the criterion of realization of a complex of function that allows to identify the key factors and socio-economic problems of the industry functioning, as well as to forecast the state of the business subject in accordance with the model of behavior and type of development is suggested.