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Process Control Charts for Always Healthy: The performance of front desk staff at the Always Healthy office was assessed. Six receptionists were selected and the
Process Control Charts for Always Healthy:
The performance of front desk staff at the Always Healthy office was assessed. Six receptionists were selected and the customer service they provided was observed seven times. The activities that the receptionists were performing were identified and the times in seconds to service a customer were recorded as noted below.
Table
Receptionists Sample data service activity duration in seconds
Receptionist Sample Sample Sample Sample Sample Sample Sample
a What value of n number of observations should be used for computing the Xbar and R control charts?
b Calculate the sigma control limits for the Xbar and the R charts. Create charts for the Xbar and the R charts based on the values you calculated and the ones provided above.
c After the control limits were established, another sample was taken and the following times were recorded in seconds: and Is the process in control? Explain why or why not. Show calculations where applicable.
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