https://drive.google.com/file/d/0B9dlwx7-YPU0ajRqbzdMc3kyd28/edit
Sima-Yaron Malihi, Dudu Barzilay-C-2013-Y-1-MM13-.mp4 - Google Drive
https://userapps.support.sap.com/sap/support/knowledge/en/2169057
2169057 - Scheduling and Activating planned material master changes with transactions MM12 & MM13 |...
You can schedule planned changes to a material master with transaction MM12 for a given date and then activate them immediately with transaction MM13....