%u2022 4.1 The following gives the number of pints of type A

blood used at Woodlawn Hospital in the past 6 weeks:

a) Forecast the mileage for next year using a 2-year moving average.

b) Find the MAD based on the 2-year moving average forecast in

part (a). (Hint: You will have only 3 years of matched data.)

c) Use a weighted 2-year moving average with weights of .4 and .6

to forecast next year%u2019s mileage. (The weight of .6 is for the most

recent year.) What MAD results from using this approach to

forecasting? (Hint: You will have only 3 years of matched data.)

d) Compute the forecast for year 6 using exponential smoothing an

initial forecast for year 1 of 3000 miles and %u03B1 = .5. PX

%u2022

August 31 360

September 7 389

September 14 410

September 21 381

September 28 368

October 5 374

a) Forecast the demand for the week of October 12 using a 3-week

moving average.

b) Use a 3-week weighted moving average with weights of .1 .3

and .6 using .6 for the most recent week. Forecast demand for

the week of October 12.

c) Compute the forecast for the week of October 12 using exponential

smoothing with a forecast for August 31 of 360 and %u03B1 = .2.PX