  Using quantum electrodynamics as an example, a dependence of physical
predictions of quantum field theory in a finite perturbation theory order on
the choice of renormalization scheme is studied. It is shown that On-Mass-Shell
renormalization scheme is distinguished in quantum electrodynamics not only due
to the agreement of the theory predictions with experimental results but also
due to a set of specific theoretical properties. Thus performing
renormalization procedure in other theories, it seems reasonable to use some of
On-Mass-Shell renormalization scheme prescriptions.
