  We consider Flavour Changing Neutral Current processes in the framework of
the supersymmetric extension of the Standard Model. FCNC constraints on the
structure of sfermion mass matrices are reviewed. Furthermore, we analyze
supersymmetric contributions to FCNC transitions which remain in the limit of
flavour-conserving sfermion mass matrices. Implications of the FCNC constraints
on the structure of sfermion mass matrices for SUSY breaking and sfermion mass
generation are discussed. We conclude that the supersymmetric flavour problem
is intriguing but perhaps not as severe as it is commonly believed.
