  The role of the final state interactions (FSI) in inclusive electro
disintegration of the deuteron, D(e,e')X, is being investigated within
different approaches. A detailed comparison between an improved Glauber method
and the standard Schroedinger approach is presented. It is shown that both
methods become inadequate at large values of Q^2, where the virtuality of the
hit nucleon after photon absorbtion is very high. The concept of finite
formation time (FFT) required by the hit hadron to reach its asymptotic form is
introduced by a Feynman diagram approach and by explicitly taking into account
the dependence of the ejected nucleon on its virtuality. The approach has been
applied both at x_{Bj} ~= 1, as well as in the so called cumulative region i.e.
at x_{Bj} > 1. Numerical calculations show that the effects of the FFT almost
completely cancel the contribution from rescattering processes. In the
cumulative region the color transparency or finite formation time effects
become fairly visible.
