CO5: Investigate forecast performance utilizing
spreadsheet techniques.
This week you will use an excel spreadsheet to analyze
forecasting performance. Your company produces and
distributes two lines of Consumer External Hard Drives: 1
Terabyte drives (1 Tb) and 5 Terabyte Drives (5 Tb). The
unit sales levels and forecasts for the last two previous
years are in the table below. For this exercise, You have
been asked to calculate the Forecast error, Forecast
Percentage, Mean percentage Error (MPE) and Mean
Absolute Percentage Error (MAPE) for (a) each type of
terabyte (b) each year, and (c) for each two-year period.
The concepts, equations, and examples for how to
calculate these forecasting effectiveness are covered in
your textbook on pages 107 – 114. Finally, for each set of
problems you will provide insight into the sales trends,
and forecasting effectiveness with a written summary of
your findings.