One central goal for the operation of the LHC is to discover supersymmetry. 
The main motivation for this is that supersymmetry can address the fine-tuning 
issues of the Standard Model Higgs sector. However, the absence of sparticles 
at the LHC is posing a problem is this regard. To deal with this situation 
it is necessary to look into fine-tuning in some more detail to find out 
what it means and to find out what the requirement of low fine-tuning means 
for phenomenology. In this work especially the possibility of a small mass 
difference between the lightest neutralino and the lightest chargino is 
investigated, both in R-parity conserving and R-parity violating models.