Uniform operation allows to eliminate equipment downtime, eliminate violations of technological discipline and eliminate unproductive costs associated with deviations from the normal course of production. Unevenness of the production process of ore extraction may not create negative consequences for other related technological processes, if this unevenness is foreseen. But disproportions arising in the technological process can not always be foreseen in advance by the plan, and to prevent them, appropriate reserves should be created (damping devices, accumulating capacity).