Statistical Process Control (SPC)

The controllability and quality capability of production processes is a precondition for ensuring the reliable manufacture of technically complex products. The term “reliability” refers here – in deviation from the definition in Chap. 3 – to the probability of a defect-free proportion with respect to a monitored product characteristic within a defined time interval of product manufacture. If the monitoring refers to a production process characteristic, “reliability” refers to the probability that the production process parameters of the production process range within the specification limits within a time interval and thus the prerequisite for fault-free production is fulfilled. Statistical process control (SPC) is an established method for ensuring controlled and quality capable manufacturing processes in industrial practice. Statistical process control is a way of maintaining an optimized manufacturing process in an optimized state through continuous monitoring and, if necessary, corrections.