  ATLAS and CMS have been performing a large number of searches for physics
beyond the Standard Model (BSM). In particular results of supersymmetry (SUSY)
searches are typically interpreted in the context of simplified models. While
mass limits obtained in this manner are highly model dependent, cross section
upper limits (or efficiency maps) may be used to obtain constraints on generic
BSM scenarios without any further event and detector simulation. This procedure
has been automatised in the public tool SModelS, which first decomposes the
generic scenario into its simplified model components which can then be tested
directly against the experimental constraints in the SModelS database. We
briefly introduce SModelS and then discuss how the coverage by simplified model
results compares to what can be obtained in a full simulation study for the
example of the 19 parameter phenomenological MSSM (pMSSM). Considering all
parameter points that ATLAS has tested in a comprehensive study [1], we find
that about 60 % of the points excluded by ATLAS can be excluded from simplified
model constraints. This fraction could be improved by considering currently
`missing' simplified model topologies. We show that in particular topologies
with asymmetric branches are often important, while long cascade decays with
more than one intermediate particle are less relevant. A particularly
interesting asymmetric branch topology is a 3 jet + $E_T^{\mathrm{miss}}$
signature arising from gluino-squark production.
