Activating Scheduled Changes to Material Master Records 
Scheduled changes to material master records must be activated manually. They are not activated automatically.
Note
When you activate scheduled changes to material master records, the following objects are also activated:
Scheduled material master records
Scheduled deletion flags
In the Material Master menu, choose
The initial screen appears.
Enter your data as required and choose Execute .
Note
To save you effort, you can create a variant so that the system performs this job daily at a specified time. You do this as follows:
Access the ABAP Editor by choosing transaction SE38 and execute program MMCHACTV.
Make sure that both date fields are blank. This ensures that the changes activated are only those for the day on which the program is run.
Choose
In the ABAP Editor, specify program MMCHACTV and choose Execute with variant .
Choose the variant, and set up the job to be run daily in the background.
The system selects all the change documents with the corresponding material(s) and date(s) in the header and updates the changes in the relevant material master records immediately . It creates a new change document, and informs you that the scheduled changes have been activated.