أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
First of all you should study demand management methodologies & philosophies.
The 2nd step is to simplifying the processes to yourself (keep in mind that as a demand planner you always try to meet your demand with the available capacity).
Finally keep working on your self and get more experience.
Regards.
