With the reorganization function, you can delete planned independent requirements for which there are no sales orders in the database :The aim of Reorganizing is to delete the old PIRs from system.
This reorganization is carried out in 3 steps:
1. Adjust requirements (Transaction-MD74):
The planned independent requirement quantities that have not been assigned before the specified reorganization key date ( This date can also be in future) are set to zero and are flagged for reorganization.In this step, you can also set the system so that it deletes all inactive planned independent requirements.
2. Reorganization of schedule lines (Transaction MD75):
The system checks which planned independent requirements were set to zero – either by reduction or consumption or by “requirement adjustment”.Schedule lines that have a quantity of zero before key date are deleted from database
3. Deleting history (Transaction MD76):
Once the reorganization process is completed, the history can also be deleted by determining a key date. The key date for deleting histories can differ from the key date of reorganization.
As an alternative to Key date we can maintain a reorganization period per plant in the customizing of Demand management which is calculated backwards from the current date. The system first checks whether a reorganization period is maintained for the plant to be reorganized. If this is the case, the system
subtracts the interval from the current date to determine the key date.
If no interval is maintained for the plant to be reorganized, the system checks whether intervals are maintained for other plants. The highest value is then used to determine the key date.
It is recommended that reorganization should be carried out periodically for example once per month.