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Operations management - job forecasting firm's sales

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Problem:
You have been assigned the job of forecasting your firm's sales.

Sales for the past 10 periods are as following:

PERIOD SALES
1 188
2 255
3 355
4 344
5 399
6 422
7 401
8 477
9 499
10 502

You wish to forecast sales for period #11. What is the forecast for period #11 using the following methods:
a. Naïve Forecast
b. 3-period moving average
c. 3-period moving average, using weights of .5, .3 and .2
d. Exponential smoothing, assuming a period 2 forecast of 188 and an alpha of .4
e. Linear trend, using regression analysis and Excel as done in the example problem.

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Solution Summary

Operations management is used for job forecasting firm's sales. The past 10 periods are examined.

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