Hello,
The delivery schedule is within the firm zone (EKPO-ETFZ1) or trade-off zone (EKPO-ETFZ2) of the scheduling agreement. You will find the firm/trade-off zones on the additional item data screen in the scheduling agreement (t-code ME32L). The field 'Binding on MRP' (EKPO-KZSTU) is also relevant for firming of schedule line You may read the F1 help of these fields to know more about them.
It's up to you how many days you want the firm the schedule line.
Refer consulting SAP note 369141 - Fixing type of scheduling agreemts delivry schedule
Best Regards,
R.Brahmankar
