Using the Galley Servicing Delay data and the Excel OM plugin, create a statistical process control chart $($SPC$)($use the c$-$chart and make sure to

click on the graph box$).$ While this method is best used in manufacturing, you can apply the principles to our problem. Since the management

wants to tightly control the error rate, use a standard deviation $(z$ value$)$ of $1\mathrm{.}5.$

Explain the chart and indicate whether it provided you with any additional information on ways to reduce errors and improve quality. Also, in

this case is a LCL needed? If not, why not?

Review the following video:

How to Make a SPC c$-$chart in Excel $($ERAU $00$:$01$:$25).$

Click on Sten $4$: Build a Cause$-$and$-$Fffect Diagram to continue..