An industry-standard methodology for measuring and controlling quality during the manufacturing process. Quality data in the form of Product or Process measurements are obtained in real-time during manufacturing.

a methodology used for measuring and controlling quality in manufacturing which has become the standard used by industry. Product and/or process measurements are collected in real-time during the manufacturing process. This data is plotted on a graph with predetermined control limits. Capacity of the process will determine the control limits whereas customers’ needs will determine the specification limits.