Servicing Delay vs. Support Staff

Event	Sun	Mon	Tues	Wed	Thur	Fri	Sat
Galley servicing delayed	3	6	11	5	5	4	10
Missing galley support staff	2	3	6	4	3	3	7

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 2.

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?