Six Sigma DMAIC Process - Control Phase - Statistical Process Control
SPC was developed by Walter Shewhart in 1924. Traditionally SPC has been used to monitor and control the output parameters of the process (Y’s).SPC uses process data and control charts to assess statistical stability, distinguish common-cause variation from signals of possible special causes, and guide investigation. This supports proactive process management; a chart alone does not establish the cause or prevent every special cause.
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