This check sheet below provides the number of errors reported for a seven day period for the events completed during the turnaround process.

EventSunMonTuesWedThurFriSatTotalTotal81230109922100Jet bridge delayed11211129Baggage belt broken00100113Refueling delayed00200013Galley servicing delayed36115541044Cabin cleaning delayed00200002Cabin not properly cleaned3510332733Baggage loading delayed10210116

Complete the steps in each section

Step 1: Develop a Histogram and Pareto Chart

Use Excel and the error data to develop a histogram and Pareto chart. Review the charts and draw conclusions from the data. Explain what the data are telling you. What actions would you suggest to reduce the number of errors?

A histogram shows the frequency of occurrences of a variable. For this exercise, we want to look at the total errors by day so your Histogram should have 7 bars, one for each day of the week. For the Pareto chart, you should also have seven bars, one for each of the events.

Step 2: Produce a Scatter Diagram

Continue with your examination of ways to reduce the error rate. Use the Servicing Delay vs. Support Staff data shown below to produce a scatter diagram comparing the galley servicing delay versus the number of staff you are short of on each respective day.

EventSunMonTuesWedThurFriSatGalley servicing delayed361155410Missing galley support staff2364337

Can you draw any conclusions based on the chart? Based solely on this data, what actions would you recommend to reduce the galley servicing delay errors?

Hint: Your errors are the Galley servicing delayed and should be on the x-axis and Missing Galley Support Staff should be on the y-axis. You should end up with a linear regression type line.

Step 3: Create a Statistical Process Control Chart

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?