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.
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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. 2
External links
References
Mandel, B.J (1969) "The Regression Control Chart", Journal of Quality Technology, 1 (1), 1–9 http://faculty.washington.edu/htamura/qm520/mandel.pdf ↩
Mandel, B.J (1969) "The Regression Control Chart", Journal of Quality Technology, 1 (1), 1–9 http://faculty.washington.edu/htamura/qm520/mandel.pdf ↩