It is assumed that the value of initial static susceptibility of polycrystalline ferrites comes from the action of particular susceptibilities of variety of different domain wall displacement processes (models). In this case at the summation of the processes it is necessary to deal with corresponding reciprocal susceptibilities. Such a sum analysed numerically by the use of experimental data both of the susceptibility of the sample and of its basic magnetic characteristics (e.g., saturation magnetisation, anisotropy constants, a.o.) in the sub ranges of temperature allows to determine the specific contribution of the models. This type of the decomposition performed for YIG and NiZn-ferrites reveals that dominating contribution comes from some forms of inclusion type model magnetization, that there is, e.g., lack of well known Globus’ model one, that the results are rather sensitive to the basic characteristics of material used.