The exponential smoothing forecast for the next period is calculated by taking the previous period's forecast and adding a fraction (determined by the smoothing constant alpha) of the error from the previous period (the difference between the actual value and the forecast).
Conditions: Requires an initial forecast value.; Alpha must be between 0 and 1.
The exponential smoothing forecast for the next period is calculated by taking the previous period's forecast and adding a fraction (determined by the smoothing constant alpha) of the error from the previous period (the difference between the actual value and the forecast).
Conditions: Requires an initial forecast value.; Alpha must be between 0 and 1.
In Excel, the formula is implemented using relative references for the previous forecast (C4) and actual sales (B4), and an absolute reference (B4) for the smoothing constant. The formula can then be copied down the column to calculate forecasts for subsequent periods.
Conditions: The smoothing constant must be stored in a fixed cell and referenced absolutely.; The data is arranged in columns for Week, Unit Sales, and Forecast.
In Excel, the formula is implemented using relative references for the previous forecast (C4) and actual sales (B4), and an absolute reference (B4) for the smoothing constant. The formula can then be copied down the column to calculate forecasts for subsequent periods.
Conditions: The smoothing constant must be stored in a fixed cell and referenced absolutely.; The data is arranged in columns for Week, Unit Sales, and Forecast.