  Exclusive and inclusive, semileptonic and non-leptonic, charmed decays of the
B-meson are investigated in the context of a phenomenological quark model.
Bound-state effects are taken care of by adopting a single (model-dependent)
non-perturbative wave function, describing the motion of the light spectator
quark in the B-meson. A nice reproduction of both exclusive and inclusive
semileptonic data is obtained. Our predictions for the electron spectrum are
presented and compared with those of the Isgur-Scora-Grinstein-Wise quark
model. Finally, our approach is applied to the calculation of inclusive
non-leptonic widths, obtaining a remarkable agreement with experimental
findings.
