  We will present a method to decide a priori whether various supersymmetrical
scenarios can be distinguished based on sparticle mass data alone. For each
model, a scan over all free SUSY breaking parameters reveals the extent of that
model's physically allowed region of sparticle-mass-space. Based on the
geometrical configuration of these regions in mass-space, it is possible to
obtain an estimate of the required accuracy of future sparticle mass
measurements to distinguish between the models. We will illustrate this
algorithm with an example. This talk is based on work done in collaboration
with B.C. Allanach (LAPTH, Annecy) and F. Quevedo (DAMTP, Cambridge).
