In this activity, you define weighting groups for use in your plan forecasts.
Using a weighting group only makes sense if you are using forecast strategy 14 (weighted moving average) in a forecast profile. This lets you individually weight the past periods you use for forecasting to calculate the forecasted values.
The numbers in the weighting group have the following meanings:
1 - current period minus one (last period)
2 - current period minus two (second-last period)
3 - current period minus three (period before the second-last period)