![]() Nowadays, quality control might be not an issue for big corporations. However, to ensure the samples are reliable to represent the total population, SPC is the tool that can diagnose whether the process is stable and in control during the period or not. ![]() Therefore, inspection through sampling is the only option left behind as the most economical method for quality control. Hence, quality control through 100% production inspection is a kind of luxury to businesses. The tool was widely used in supporting armoury production during World War.ĭuring the war, the resources (e.g. In the 1920s, Dr Walter Shewhart developed the control chart for Bell Laboratories and published Shewhart’s book Statistical Method from the Viewpoint of Quality Control (1939). Do you know that Statistical Process Control (SPC) is one of the industry’s oldest quality tools?
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