Scheduling after Activity Confirmation in SAP S/4HANA

[Ali_Kaynee]

Hi experts, 

We have a problem with project scheduling. after actual confirmation for activities and schedule project, WBS dates are re-scheduled and start with the start of activities without confirmation. our scenario is bottom-up and we don't want to use top-down. How can we use the activity's actual start date for the WBS basic start date?
The image below shows this problem. 

[MarcioBlos]

Hi Ali

In scheduling, SAP always uses the current date as the start date, never dates in the past. Therefore, any activity that has not started yet and was previously scheduled to start in the "past" will be scheduled to start in the current date.

To update scheduled dates in WBS element, it is necessary to extrapolate dates. This function involves "pushing up" the scheduled dates from the activities to the WBS element.

Regards,
Marcio Blos

[Serge_Driendl]

Hi, if activities/WBS are scheduled in the past or not highly depends on the settings (see the indicator "start in the past" in Kens post).