SAP Reservation Status
Reservation can be created in two ways. One is through MD02 when running the MRP on an specific material, another way is to manually create the reservation using MB21.
The status of reservation varies in above two ways. If it is created using MD02, the status field(RESB-RSSTA) is ‘B‘, otherwise, the value is ‘M’ which stands for it is manually created reservation. If you change the auto created reservation in MD04, the status will be changed to ‘M’.
If after the ATP check, the confirmed quantity(RESB-VMENG) of reservation is larger than 0 and the status is ‘M’, this reservation will aways firmed in MD04. That is to say, the reservation will not be rescheduled by MRP logic.
