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Statistical process control (SPC) is the application of statistical tools to analyze a business process. Often SPC refers to seven analytical tools, referred to as 7QC tools:
Fishbone diagram (Ishikawa or cause-and-effect diagram)
The literature on 7QC tools is inconsistent in its listing of the seven tools. Some lists include charts, and others include stratification. This inconsistency is not important; the real issue is that one should use the appropriate tools.