Shewhart control charts

A Shewhart control chart detects changes in a process.

Basic Shewhart control chart

Advanced Shewhart control chart with phases and stratification

• Shewhart variables control charts
  Variables control charts plot quality characteristics that are numerical (for example, weight, the diameter of a bearing, or temperature of the furnace).
• Shewhart attributes control charts
  Attributes control charts plot quality characteristics that are not numerical (for example, the number of defective units, or the number of scratches on a painted panel).
• Shewhart control chart rules
  Tests for special-cause variation determine when a process needs further investigation.