What does CNC primarily do?

CNC, which stands for Computer Numerical Control, primarily refers to the automated control of machinery through the use of computers. This technology allows for precise and efficient machining processes where a computer program dictates the movements and actions of machines such as CNC mills, lathes, and routers.

By using CNC, manufacturers can achieve high levels of precision, consistency, and speed in producing complex parts compared to manual operation. The ability to input designs directly via CAD (Computer-Aided Design) and translate them into machine instructions enhances product quality and reduces the risk of human error during production.

In contrast, the other options involve aspects of product development and management that do not align with the core function of CNC technology. Automated calculation of costs, quality testing, and product design all serve important roles within production but do not pertain to the operational focus of CNC systems.