  The fine-tuning principles are examined to predict the top-quark and
Higgs-boson masses. The modification of the Veltman condition based on the
compensation of vacuum energies is developed. It is implemented in the Standard
Model and in its minimal extension with two Higgs doublets. The top-quark and
Higgs-boson couplings are fitted in the SM for the lowest ultraviolet scale
where the fine-tuning can be stable under rescaling. It yields the low-energy
values $m_t \simeq 175 GeV; m_H \simeq 210 GeV$.
