Hi Abhishek,
You can use prioritization ATPCAT for the same. In customizing assign categories accordingly under category tab. Example
| 1 | BR | Deliv. |
| 2 | BM | SalesOrder |
| 3 | BN | SchAgr |
| 4 | FA | FC req. |
Supply Chain Planning - Multilevel Supply & Demand Matching (SDM) - Demand Prioritization - Define Special Sorting
If you want to further influence then you can use USEREXIT prioritization. For the same check SAP note.
450794 - CTM: User Exit EXIT_/SAPAPO/SAPLBOP_SORT_020
Regards
Rahul