  Entropy is a fundamental concept from Thermodynamics and it can be used to
study models on context of Creation Cold Dark Matter (CCDM). From conditions on
the first ($\dot{S}\geq0$)\footnote{Throughout the present work we will use
dots to indicate time derivatives and dashes to indicate derivatives with
respect to scale factor.} and second order ($\ddot{S}<0$) time derivatives of
total entropy in the initial expansion of Sitter through the radiation and
matter eras until the end of Sitter expansion, it is possible to estimate the
intervals of parameters. The total entropy ($S_{t}$) is calculated as sum of
the entropy at all eras ($S_{\gamma}$ and $S_{m}$) plus the entropy of the
event horizon ($S_h$). This term derives from the Holographic Principle where
it suggests that all information is contained on the observable horizon. The
main feature of this method for these models are that thermodynamic equilibrium
is reached in a final de Sitter era. Total entropy of the universe is
calculated with three terms: apparent horizon ($S_{h}$), entropy of matter
($S_{m}$) and entropy of radiation ($S_{\gamma}$). This analysis allows to
estimate intervals of parameters of CCDM models.
