Statistical process control (SPC) methodology was developed to monitor, control, and improve products and services.

Statistical process control (SPC) methodology is a quality control tool that was developed to monitor, control, and improve products and services. It uses statistical analysis to identify causes of variation in a process, and then allows for adjustments to be made to bring the process back to its desired level of performance. SPC has been widely used in industry and manufacturing, but can also be applied to service industries such as healthcare and finance.