  Self-organizing system is studied whose behavior is governed by field of an
order parameter, a fluctuation amplitude of conjugate field and a couple of
Grassmannian conjugated fields that define the entropy as a control parameter.
Within the framework of self-consistent approach the dependencies of macro- and
microscopic susceptibilities as well as memory and nonergodicity parameters are
determined as a functions of the intensities of thermal and quenched disorders.
Making use of the sandpile model shows that proposed scheme determines the
conditions of avalanches formation in self-organized criticality phenomena.
