  We perform two tunes of the SHERPA Monte Carlo generator for the generation
of $e^+e^-\rightarrow\mbox{hadrons}$ using the publicly-available LEP analyses
in Rivet. In each of these tunes, we generate events at $\sqrt{s}=91.25\mbox{
GeV}$ using matrix elements for final states containing up to six partons. In
the first, "LO" tune, matrix elements for all final states are generated at
leading order; in the second, "NLO" tune, matrix elements for final states with
up to four partons are generated at next-to-leading order using BlackHat, while
those for states with five and six partons are generated at leading order. The
tunes are accomplished using Professor, and comparisons with unfolded LEP1 and
LEP2 data are produced with Rivet. We also compare the data with events
generated with KK2f interfaced to PYTHIA using the standard ALEPH tune. We find
that both SHERPA samples show improvement relative to KK2f for observables
related to four-jet final states, while all three samples produce comparable
results for event-shape variables. Overall, the agreement with data is best for
the LO tune. We provide our tuning parameters and many data-Monte Carlo
comparisons.
