What's the recommended way to incorporate actuals into the forecast scenario for workforce planning

Summary:

In the Forecast scenario in Workforce planning you load data into the current month and then run process loaded data to push out to future months. That's all ok, but the forecast for previous months needs to be replaced by the actuals which have been loaded for that month so that the forecast for the yeartotal is accurate. (In the same way that you do for Financials cube)

However, when you make any changes to the data that requires a recalculation of the forecast e.g. update salary value then when the rules run it runs for all periods in the forecast not just the future months, so it overwrites the actuals which have been copied into the forecast scenario.