Solution : https://service.sap.com/sap/support/notes/110988 (SAP Service marketplace login required)
Key words : 
additional key words co40, components produced directly, assembly produced directly, direct procurement data, individual customer level, things goods movements, stock/requirements list, direct procurement indicator, direct production segment, check order intervals
Related Notes : 
       
| 174538 | CO40: Incorrect order quantities in collective order | 
| 160818 | Partial cnvrsion plnnd collctve ord, compnent loss | 
| 142552 | Part. conv. of plnd collective orders not possible | 
| 115892 | MRP: Direct production for alternative item |