Consider the Camshaft example we reviewed $($in class$/$video$).$ Use the $2-$phase control chart below and concepts from Juran$$s Triology to fill in the blanks below $($for each blank select one of the words that are in parenthesis and$/$or write the relevant numerical value$)$

Before implementing improvements, all observations were $($outside$/$inside$)$

the control limits$.$ Therefore, we can conclude that the process was $($in$/$out of$)$

control and that there were NO $($common$/$special$)$

causes of variation.

To $($increase$/$reduce$)$

variability, the lean six$-$sigma team investigated $($common$/$special$)$

causes of variation and implemented improvements. The phased control chart above shows that after implementing the improvements, the process is $($in$/$out of$)$

control.

Moreover, after improvement, the mean of the Xbar chart $($increased$/$decreased$)$

which indicates that the process is now $($closer to$/$farther away from$)$

the target.

Overall, the width of the Xbar and R charts after improvements are $($wider$/$narrower$)$

than before improvements. This observation indicates that the $($variability$/$mean$)$

of the process $($increased$/$decreased$)$

$.$

From $($c$)$ and $($d$)$ above we conclude that the lean six$-$sigma initiative $($improved$/$deteriorated$)$

process performance.