  ATLAS and CMS have performed a large number of searches for physics beyond
the Standard Model (BSM). The results are typically presented in the context of
Simplified Model Spectra (SMS), containing only a few new particles with fixed
decay branching ratios, yielding generic upper limits on the cross section as a
function of particle masses. The interpretation of these limits within
realistic BSM scenarios is non-trivial and best done by automated computational
tools. To this end we have developed SModelS, a public tool that can test any
given BSM model with a $\mathbb{Z}_2$ symmetry by decomposing it into its SMS
components and confronting them with a large database of SMS results. This
allows to easily evaluate the main LHC constraints on the model. Additionally,
SModelS returns information on important signatures that are not covered by the
existing SMS results. This may be used to improve the coverage of BSM searches
and SMS interpretations. We present the working principle of SModelS, in
particular the decomposition procedure, the database and matching of applicable
experimental results. Moreover, we present applications of SModelS to different
models: the MSSM, a model with a sneutrino as the lightest supersymmetric
particle and the UMSSM. These results illustrate how SModelS can be used to
identify important constraints, untested regions and interesting new
signatures.
