The feed industry tends to equate, for example, a 2-ton mixer with 20 tons per hour capacity, a 3-ton mixer with 30 tons per hour, a 5-ton mixer with 50 tons per hour, ect. Those rules of thump are generally misleading and, at best, only true (or near true) on long production runs of the same product and, then, with nearly 100% efficiency. There are several criteria that must be part of the equation for finding the real capacity of a batch mixing system :