1. A sales completion team, aiming to reduce the shipment time of urgent orders, studies the current process and finds that the current shipment time has a mean of 4 days with a standard deviation of 1.5 days. Industry expectations are for urgent shipments to be delivered between 1 and 5 days.
(a) What is the current process capability Cpk? Please keep 4 decimal places for your answer.
2. (Continue with Question above)
A sales completion team, aiming to reduce the shipment time of urgent orders, studies the current process and finds that the current shipment time has a mean of 4 days with a standard deviation of 1.5 days. Industry expectations are for urgent shipments to be delivered between 1 and 5 days.
(b) One manager felt that the mean could be reduced to 3 days without changing the standard deviation. What is the process capability Cpk of the new system? Please keep 4 decimal places for your answer.
3. A sales completion team, aiming to reduce the shipment time of urgent orders, studies the current process and finds that the current shipment time has a mean of 4 days with a standard deviation of 1.5 days. Industry expectations are for urgent shipments to be delivered between 1 and 5 days.
(c) Another manager felt that the standard deviation could be reduced to 0.8 days without changing the mean. What is the process capability Cpk of the new system? Please keep 4 decimal places for your answer.