I created a forecasting model in tableau which predicts sales figures for coming periods (lets say aug 18 - dec 18), I know in forecasting option users can choose to ignore uncompleted period, ( for ex Aug is not complete yet therefore I can choose to ignore Aug numbers in my forecast)
my question is how does the forecast for sep - dec 2018 will be effected once Aug is complete? will the forecast refresh itself by taking the new month's data into consideration ( and similarly quarterly and yearly) ?
If the forecast can be built in Tableau on the refresh then it should update. If it fails to update due to one of the issues here - Forecast Option Not Available (Grayed Out) | Tableau Software then that issue will need to be addressed.