This feature is maintained in Customizing via the Travel Management Implementation Guide.
The entry type that the system starts via workflow to create a travel request depends on how the CBW parameter of feature TRVPA is set.
Switch WRC in feature TRVPA is used to decide whether time overlaps are allowed in business trips and weekly reports.
If overlapping is allowed, the system no longer checks whether a weekly report has been recorded for the relevant period when a trip is created, nor whether a trip has been recorded for the relevant period when a weekly report is created.
The system does still check for overlapping trips when trips are recorded and overlapping weekly reports when weekly reports are recorded.