APC solution is designed to coexist in parallel with existing systems, such as MES, ERP as well as DCS, complementing them. Moreover, without the presence of a properly functioning of DCS, it is premature to talk about the transition to APC. APC solutions integrate with existing distributed control systems (DCS) for optimal plant control. The idea of the model is to build a mathematical representation of the controlled process and integrate this model in the control loop in real time mode. It is worth saying that in addition to mathematical models, which are the "calling card" of the solutions offered on the APC market, APC also uses other methods of modern automation. One example of the effective using of APC in process is stabilization problems, which can be solved using the classic PID control, but by using a modern APC solution, the problem can be solved more efficiently, for example, by not just stabilizing the process, but stabilizing it in a technologically feasible and at the same time the most cost-effective state of equilibrium. This process is called "stock removal by quality".