  Following the generalization of the notion of families of characters, defined
by Lusztig for Weyl groups, to the case of complex reflection groups, thanks to
the definition given by Rouquier, we show that the degree and the valuation of
the Schur elements (functions A and a) remain constant on the "families" of the
cyclotomic Hecke algebras of the exceptional complex reflection groups. The
same result has already been obtained for the groups of the infinite series and
for some special cases of exceptional groups.
