  We present a description of the measurement process based on the parametric
representation with environmental coherent states. This representation is
specifically tailored for studying quantum systems whose environment needs
being considered through the quantum-to-classical cross-over. Focusing upon
projective measures, and exploiting the connection between large-$N$ quantum
theories and the classical limit of related ones, we manage to push our
description beyond the pre-measurement step. This allows us to show that the
outcome production follows from a global-symmetry breaking, entailing the
observed system's state reduction, and that the statistical nature of the
process is brought about, together with the Born's rule, by the macroscopic
character of the measuring apparatus.
