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Quality control: Prozess control
A control chart for sample means and item ranges based on variables is constructed.
Symbols:
| x(i,b) |
observation b in sample i |
| x |
overall mean of observations |
| n |
sample size |
| A(n) |
control chart factors used for x-chart |
| B(n), C(n) |
control chart factors used for R-chart |
Literature:
- Meredith (1992), Chapter 17
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