gli audits sono le verifiche ispettive; questo è il termine che si usa quando si fanno gli audits per verificare il Sistema Qualità (ISO 9001).

In engineering, energy balances are used to quantify the energy used or produced by a system. This can be used to build complex differential equation models to design and analyze real systems. To make an energy balance for a system is very similar to making a Mass balance but there are a few differences to remember, e.g. 1) that a specific system might be closed in a mass balance sense, but open as far as the energy balance is concerned and 2) that while it is possible to have more than one mass balance for a system there can be only one energy balance. If a balance is made for total energy, the energy balance becomes IN=OUT+ACC (where ACC stands for accumulation). Notice that there is no production (PROD) term since energy can not be produced, only converted. If instead some kinds of energy are ignored, e.g. if a heat balance is made the energy balance becomes IN+PROD=OUT+ACC (if heat is consumed the PROD term is negative, compare Mass balance.