  SModelS is an automatised tool for the interpretation of simplified model
results from the LHC. It allows to decompose models of new physics obeying a Z2
symmetry into simplified model components, and to compare these against a large
database of experimental results. The first release of SModelS, v1.0, used only
cross section upper limit maps provided by the experimental collaborations. In
this new release, v1.1, we extend the functionality of SModelS to efficiency
maps. This increases the constraining power of the software, as efficiency maps
allow to combine contributions to the same signal region from different
simplified models. Other new features of version 1.1 include likelihood and
chi-square calculations, extended information on the topology coverage, an
extended database of experimental results as well as major speed upgrades for
both the code and the database. We describe in detail the concepts and
procedures used in SModelS, explaining in particular how upper limits and
efficiency map results are dealt with in parallel. Detailed instructions for
code usage are also provided.
