  After summarising very briefly the key features of different model
predictions for sparticle masses and their relation with the supersymmetry
(SUSY) breaking scales and parameters, I discuss the capabilities of an $e^+
e^-$ Linear Collider (LC) with $\sqrt{s} \geq$ 500 GeV for precision
measurements of sparticle properties. Then I focus on the lessons one can learn
about the scale and mechanism of SUSY breaking from these measurements and
point out how LC can crucially complement and extend the achievements of the
LHC. I end by mentioning what would be the desired extensions in the
type/energy of the colliding particles and their luminosity from the point of
view of SUSY investigations.
