Starbucks has a large, global supply chain that must efficiently supply over 17,000 stores. Although the stores might appear to be very similar, they are actually very different. Depending on the location of the store, its size, and the profile of the customers served, Starbucks management configures the store offerings to take maximum advantage of the space available and customer preferences. Starbucks' actual distribution system is much more complex, but for the purpose of our exercise let's focus on a single item that is currently distributed through a single distribution center located in West Chester, PA. Our item is a logo branded coffeemaker that is sold at some of the larger retail stores. The coffeemaker has been a steady seller over the years due to its reliability and rugged construction. Starbucks does not consider this a seasonal product, but there is some variability in demand. Demand for the product over the past 10 weeks is shown in the following table. The current quarter's data are pretty close to the demand shown in the table. Management would like you to experiment with some forecasting models to determine what should be used in a new system to be implemented. The new system is programmed to use one of two forecasting models: simple moving average or exponential smoothing.

Please Note: To calculate Exponential smoothing method with alpha of .2 and .4, assume that F1=A1 (forecasting for week 1 is the same as actual value for week1)

	Week	-5	-4	-3	-2	-1	1	2	3	4	5	6	7	8	9	10	11	12	13
	West Chester	45	38	30	58	37	33	45	37	38	55	30	18	58	47	37	23	55	40
3-MA
5-MA
ES (.2)
ES (.4)

Which of the following answer is correct? (Round your answer to 1 decimal place)

a)	3-month moving average = MAD (11.2)

b)	5-month moving average = MAD (11.4)

c)	Exponential smoothing with alpha of .4 = MAD (10.4)

d)	Exponential smoothing with alpha of .2 = MAD (10.4)