3-2 Sales of Cool-Man air conditioners have grown steadily during the past 5 years:
Year Sales 1 440 2 465 3 520 4 573 5 586 6 ?
The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. a. Using exponential smoothing with a weights of a = 0.30, 0.60, and 0.90 develop forecasts for years 2 through 6. b. What effect did the smoothing constant have on the forecasts for Cool-Man air conditioners? c. Which smoothing constant gives the most accurate forecast? d. Use a three-year moving average forecasting model to forecast the sales of Cool-Man air conditioners. e. Use the trend projection method to develop a forecast for the sales of CoolMan air conditioners. f. Which of the five models you developed was the most accurate (best)?
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