  This papers deals with overall phase transformation kinetics. The
Fokker-Planck type equation is derived from the generalized nucleation theory
proposed by Binder and Stauffer. Existence of the steady state solution is
shown by a method based on the mean value theorem of differential calculus.
  From the analysis of asymptotic behavior of the Fokker-Planck type equation
it is known that the number of clusters having the critical size increases with
time in the case of constant driving force. On the basis of the present study
on overall phase transformation kinetics a simple method for analyzing
experimental phase transformation curves was proposed.
