  We theoretically consider charge transport through two quantum dots coupled
in series. The corresponding full counting statistics for noninteracting
electrons is investigated in the limits of sequential and coherent tunneling by
means of a master equation approach and a density matrix formalism,
respectively. We clearly demonstrate the effect of quantum coherence on the
zero-frequency cumulants of the transport process, focusing on noise and
skewness. Moreover, we establish the continuous transition from the coherent to
the incoherent tunneling limit in all cumulants of the transport process and
compare this with decoherence described by a dephasing voltage probe model.
