A process called Statistics Process Control (SPC) is used to control quality in manufacturing operations. This SPC is considered as the statistical quality control method to control and monitor different processes in products and services. Statistical Quality Control (SQC) is a scientific method where manufacturing data is analyzed. Under this analysis measures are recorded and analyzed to control and maintain the quality of the manufactured products and services offered. Under this method a control chart is the tool used to check and monitor the variations and to ensure that the process is in a state of control.

I would like for you to give a mathematical example to show how it would be incorporated.