%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