A customer wants delivery to be ensured between 10 am and 2 pm. Your truck leaves the factory at 4 am and the time taken to reach the customer is normally distributed with an average of 8 hrs and a standard deviation of 1 hr.
-What specific action(s) (in terms of mean and standard deviation targets to be achieved) would you take to improve the ability of the delivery process to be a 6-σ process (like Motorola)?

Question

Quizplus · Accepted Answer

The Answer is Target mean= Same as before
Target standard deviation = σ = 1/3 will yield Cp = 2, which corresponds to six sigma quality. To reduce the standard deviation, use interstate highways to avoid unforeseen traffic jams and lights. Get good, reliable trucks, reduce travel distance (which also affects the mean), improve driver training, etc.

A Customer Wants Delivery to Be Ensured Between 10 Am