SAP IBP - Forecast consumption -Open Sales Order in the past (backlog order)

Hi IBP Expert,

I was wondering if you could please advise if SAP IBP Time Series forecast consumption can consider open sales order in the past (Backlog order)?

For example, current week is week 48. There are open SO and consensus demand qty in week 46 (past week).

How to enable forecast consumption to consider past SO (backlog) to the current week demand and to consume past consensus demand accordingly?

Thank you very much for your advice.

Cheers,

Erwan