Regression control chart explained

In statistical quality control, the regression control chart allows for monitoring a change in a process where two or more variables are correlated. The change in a dependent variable can be detected and compensatory change in the independent variable can be recommended. Examples from the Post Office Department provide an application of such models.^[1]

Difference

Regression control chart differs from a traditional control chart in four main aspects:

• It is designed to control a varying (rather than a constant) average.
• The control limit lines are parallel to the regression line rather than the horizontal line.
• The computations here are much more complex.
• It is appropriate for use in more complex situations. ^[1]

External links

• Quality Inspection

Notes and References

1. Mandel, B.J (1969) "The Regression Control Chart", Journal of Quality Technology, 1 (1), 1 - 9