MD02 - Generate Schdule lines against Schedule agreement.

Question

Hi,
The scenario is as follows.
1. Created Schedule agreement.
2. Maintained Source list with MRP relavant indicator active.
3. Generated the schedule lines through MD02.
Example:
Suppose partial receipts against above S.A are posted and still some open quantity is pending.
In this case assume one schedule line is already exists in MD04 for some qty (Ex.50 Nos) If we increase the requirement quantity (safety stock) in material master and re-run the
MD02 transaction first schedule line of older date should remain as it is and new schedule
line with proposed quantity & date should generate as a new line item. At present
system is overwriting the old schedule line and generating the new schedule line for entire qty.
Please suggest.
Thanks in advance.
Regards,

Answer 1

Hello,
There are two possible status for schedule lines:
        1- Fixed schedule lines : System doesn't change these schedule lines upon MRP run
        2 Non fixed schedule lines : during MRP run, system deletes these schedule lines and creates new ones.
To make a schedule line fixed there are two possibilities:
                    1- User set manually the indicator fixed schedule line in transaction ME38
                    2- Schedule line lies within the firm period.
The firm period :
For each schedule agreement you can define the firm zone : 
1- ME32L change schedule agreement
2- select the item then in toolbar> Item> More function-->additional data  Scheduling control
enter the firm zone "number of days".
If schedule line lies whithin this zone system will kepp it and create new line for additional requirement
Best Regards