Is the process in control? If the control chart indicates an out-of-control process, note which days, the pattern, and whether it is the Xbar or R chart.

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Is the process in control? If the control chart indicates an out-of-control process, note which days, the pattern, and whether it is the Xbar or R chart.

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Allison Jon, the manager of an 800-number reservation service for a nationwide chain of luxury hotels, is concerned about the productivity of her operation. Analysis of past data shows that it should take an average of four minutes to properly process a reservation. To setup a control chart for reservation service time, Allison records the time it takes to complete the reservation. She randomly samples 5 reservations every day for 30 days.
Based on the background information above and the data file provided in the previous step, what is the sample size for the data that was collected?
Steps to set up control charts:

Set up the appropriate control charts for the 30 days of data.
Calculate the control limits for each chart.
Plot the data for the 30 days in an Xbar chart and an R chart.

Using on the data file provided in the previous step, set up the appropriate control charts for the 30 days of data, calculating the control limits for each chart.
 
What is the upper control limit for the X-bar Chart? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value.
Steps to set up control charts:

Set up the appropriate control charts for the 30 days of data.
Calculate the control limits for each chart.
Plot the data for the 30 days in an Xbar chart and an R chart.

Using on the data file provided in the previous step, set up the appropriate control charts for the 30 days of data, calculating the control limits for each chart.
 
What is the lower control limit for the X-bar Chart? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value.
Steps to set up control charts:

Set up the appropriate control charts for the 30 days of data.
Calculate the control limits for each chart.
Plot the data for the 30 days in an Xbar chart and an R chart.

Using on the data file provided in the previous step, set up the appropriate control charts for the 30 days of data, calculating the control limits for each chart.
What is the upper control limit for the R (range) Chart? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value.
Steps to set up control charts:

Set up the appropriate control charts for the 30 days of data.
Calculate the control limits for each chart.
Plot the data for the 30 days in an Xbar chart and an R chart.

Using on the data file provided in the previous step, set up the appropriate control charts for the 30 days of data, calculating the control limits for each chart.
 
Background information: Allison collected additional days of data to monitor the process.
Steps to monitor using the control charts:

Now monitor the process. An additional ten days of data have been collected, see table labeled “1st 10 Days of Monitoring Reservation Processing Time” in the Data File.
Develop Xbar and R charts for the 1st 10 days of monitoring. Plot the data for the 1st 10 days on the Xbar and R charts.
Is the process in control? If the control chart indicates an out-of-control process, note which days, the pattern, and whether it is the Xbar or R chart.

 
Now that we have set up the control charts using enough data from a stable process, the 30 days of data, we will monitor the process. While monitoring the process, what will we use as the upper control limit for the X-bar Chart to compare against our new x-bar values? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value.
Background information: Allison collected additional days of data to monitor the process.
Steps to monitor using the control charts:

Now monitor the process. An additional ten days of data have been collected, see table labeled “1st 10 Days of Monitoring Reservation Processing Time” in the Data File.
Develop Xbar and R charts for the 1st 10 days of monitoring. Plot the data for the 1st 10 days on the Xbar and R charts.
Is the process in control? If the control chart indicates an out-of-control process, note which days, the pattern, and whether it is the Xbar or R chart.

 
Now that we have set up the control charts using enough data from a stable process, the 30 days of data, we will monitor the process. While monitoring the process, what will we use as the lower control limit for the X-bar Chart to compare against our new x-bar values ? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value.
Background information: Allison collected additional days of data to monitor the process.
Steps to monitor using the control charts:

Now monitor the process. An additional ten days of data have been collected, see table labeled “1st 10 Days of Monitoring Reservation Processing Time” in the Data File.
Develop Xbar and R charts for the 1st 10 days of monitoring. Plot the data for the 1st 10 days on the Xbar and R charts.
Is the process in control? If the control chart indicates an out-of-control process, note which days, the pattern, and whether it is the Xbar or R chart.

 
Now that we have set up the control charts using enough data from a stable process, the 30 days of data, we will monitor the process. While monitoring the process, what will we use as the upper control limit for the R (range) Chart to compare against our new range values? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value.
Background information: Allison collected additional days of data to monitor the process.
Steps to monitor using the control charts:

Now monitor the process. An additional ten days of data have been collected, see table labeled “1st 10 Days of Monitoring Reservation Processing Time” in the Data File.
Develop Xbar and R charts for the 1st 10 days of monitoring. Plot the data for the 1st 10 days on the Xbar and R charts.
Is the process in control? If the control chart indicates an out-of-control process, note which days, the pattern, and whether it is the Xbar or R chart.

 
Now that we have set up the control charts using enough data from a stable process, the 30 days of data, we will monitor the process. While monitoring the process, what will we use as the lower control limit for the R (range) Chart to compare against our new range values? Enter your response to three decimal places. You do not need to include the units (minutes), ONLY the numeric value.

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