Dear,
Please refer
Combining Production and Process Orders with Batch Production
You can combine the following orders with Base unit should be same.
· Sales orders
· Planned orders
· Production orders by
Combination by order
Combination by operation in same plant (You cannot combine operations for external processing)
Combination by material please refer the screen shot for selection,
Please go in details of SAP help which explain the details,
http://help.sap.com/saphelp_dimp50/helpdata/EN/4e/1796374b088e5ce10000009b38f8cf/frameset.htm
Regards,
R.Brahmankar