Solution : https://service.sap.com/sap/support/notes/401699 (SAP Service marketplace login required)
Key words : 
1     05/10/2001      10 pcs                    10 pcs2     05/20/2001      10 pcs                    5 pcs3     05/30/2001      10 pcs                    0 pcsthe system assigns, 2 05/20/2001 80000005/000010        10 pcs                    5 pcs1 05/10/2001 80000004/000010        10 pcs                    5 pcs1 05/10/2001 80000003/000010        10 pcs                    5 pcsconsequently, 1         05/10/2001    10 pcs2         05/20/2001    10 pcs3         05/30/2001    10 pcsavailable delivery items, delivery item   schedule line quantity, additional key words mcvbel, originally assigned schedule lines, scheduling agreement schedule line, scheduling agreement item, schedule line quantity, component supplier industry
Related Notes : 
       
| 771893 | Error in reconstructing 2LIS_12_VCSCL | 
| 204130 | SIS update: Collective note | 
| 174141 | SIS: Collective note - Customizing | 
| 174134 | SIS: Collective note - reorganization | 
| 125763 | SIS: Collective note - component supplier |