The section Filling a Child Request describes the process of forming child requests separately for each department. The department "Bar 1st floor Restaurant1" requested dishes and goods from the departments "Confectionery Workshop", "Kitchen Restaurant1", and "Main Warehouse Restaurant1". In turn, the "Confectionery Workshop" requested missing ingredients from the "Central Warehouse", and so on.
For the convenience of creating the entire request chain at once based on an external or internal request, you can use the "Create Request Tree" functionality.