Exercise 1: A call centre reports to its customers that it will resolve a particular type of fault within 15 minutes. This fifteen minute time is the upper specification limit. It is desirable to resolve the fault as soon as possible and therefore there is no lower specification limit. The call centre operates 24 hours a day in 8 hour shifts. Six calls are randomly measured every shift and recorded for 2 months. The process was deemed to be in a state of statistical control. The average time to fix the faults was about 11.5 minutes with a standard deviation of 2.1 minutes. Calculate the Cpu and comment on the capability index. Exercise 1: A call centre reports to its customers that it will resolve a particular type of fault within 15 minutes. This fifteen minute time is the upper specification limit. It is desirable to resolve the fault as soon as possible and therefore there is no lower specification limit. The call centre operates 24 hours a day in 8 hour shifts. Six calls are randomly measured every shift and recorded for 2 months. The process was deemed to be in a state of statistical control. The average time to fix the faults was about 11.5 minutes with a standard deviation of 2.1 minutes. Calculate the Cpu and comment on the capability index