  Supersymmetric particles can be produced copiously at future colliders. From
the high-precision data taken at e+e- linear colliders, TESLA in particular,
and combined with results from LHC, and CLIC later, the low-energy parameters
of the supersymmetric model can be determined. Evolving the parameters from the
low-energy scale to the high-scale by means of renormalization group techniques
the fundamental supersymmetry parameters at the high scale, GUT or Planck, can
be reconstructed to reveal the origin of supersymmetry breaking.
