The inventory analysis, on whose degree of detail depends the reliability of the final results and the
pertinence of the possible proposals of technical-environmental improvement, is important for the
creation of an operational analogical model of the reality, in order to represent most faithful possible all
the exchanges among the single belonging operations to the real productive chain. Peculiar characteristic
of such model is to allow simulation with rapid comparison of the results. The following phase of
interpretation and improvement constitutes the moment in which the attempts to reduce the impact on the
environment, due to the analyzed system, goes through a phase of simulation with immediate comparison
of the results, with the purpose to verify the reliability and the effectiveness of it