  Modern experiments aimed at measuring neutrino oscillation parameters have
entered the age of precision. The determination of these parameters strongly
depends on the ability to reconstruct the energy distributions of the neutrino
beams. We compare two different energy reconstruction techniques: the
reconstruction based on the kinematic of the outgoing lepton and the one based
on the calorimetric method. Furthermore, we analyze realistic detector
capabilities, such as energy resolutions, thresholds and efficiencies, in order
to estimate how well they need to be evaluated to avoid a significant bias in
the extraction of the oscillation parameters.
