While applying attribute charts, the first chart we need to consider is R $-$ chart.

X$-$chart monitors within$-$sample variability and R$-$chart monitors between$-$sample

variability.

F

ili.

iv$.$

F

If Cp$*=0,$ the process mean is centered inside the specification limits$.$

Cp can take negative values.

v$.$

F

If you increase the number of sensitizing rules $($pattern recognition$)$ for a control

chart, you may decrease the false alarm probability!

F

vi$.$

An out$-$of$-$control point is always removed in the calculation of control limits at

Phase I.