Statistical quality control refers to usage of statistical techniques for measurement and improvement of the quality processes and include SPC in addition to other techniques, such as sampling plans, experimental design, variation reduction, process capability analysis and process improvement plans.
The present idea of quality concentrates, first of all, on the change of quality approach strategy. At present, special attention is paid to “prevention strategy” which replaces “detecting strategy”. SPC is used to monitor the consistency of processes used to manufacture a designed product