On the basis of Langevin equation the optimal SUSY field scheme is formulat
ed to describe a non-equilibrium thermodynamic system with quenched disorde
r and non-ergodicity effects. Thermodynamic and isothermal susceptibilities
, memory parameter and irreversible response are determined at different te
mperatures and quenched disorder intensities. (C) 1999 Elsevier Science B.V
. All rights reserved.