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)
Checklist
Control chart
Flowchart
Histogram
Pareto diagram
Scatter 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.