First of all, it's worth mentioning that child orders are not scheduled individually but through their master line, that is, in order to "place" child orders into the schedule it's enough to schedule the related master line.
Master lines can be scheduled using any of the modules available for standard lines (i.e. Strategic Editor, Air Sales Schedule, etc). the following example illustrates the scheduling through Strategic Editor:
1. Open the Strategic Editor,
2. Make right-click on the desired segment and search for commercial orders:
3. Select the master line and insert into the schedule:
4. Once scheduled, the event will be counted for the master line:
see also:
Invoicing child lines