Statistical Process Control (SPC) uses statistics & control charts to tell when to adjust process. Developed by Shewhart in 1920’s. It involves : creating standards (upper & lower limits), measuring sample output (e.g. mean wgt.), and taking corrective action (if necessary). SPC done while product is being produced. SPC Chart is a chart with time on the horizontal axis to plot values of a statistic. SPC Chart is one of Seven Tool for Total Quality Management (TQM).
Statistical Process Control Steps