A Pizza restaurant offer “30 minute” delivery to its custome…

A Pizza restaurant offer “30 minute” delivery to its customers. It knows that customer are satisfied it they receive their pizza within 23 to 35 minutes (no sooner or later). Its data show that delivery times are normally distributed with an average of 30 minutes and a standard deviation of 3 minutes. The restaurant owner monitors the delivery process by randomly recording 9 delivery times daily. What is the process Capability Ratio (Cpk)?

Weekly demand for copier paper is normally distributed a mea…

Weekly demand for copier paper is normally distributed a mean of 3,000 boxes and a standard deviation of 200 boxes. The business operates 50 weeks every year. The store pays $20 per box to and estimates holding at 10% per year. It costs $100 to place and receive an order from the supplier. It takes 1 week for an order of additional paper boxes to be supplied. How many boxes should be ordered (approximately) at a time from the supplier in order to minimize costs?