The biggest thing I look for in material control is first in-first out, how you deal with date sensitive materials and how you deal with temperature sensitive materials. I don't have any sample procedures but then again, material control procedures tend to be quite company/facility specific.
As far as a production planning procedure, write it with consideration to the APQP manual. You should be looking at a high level document and you may have lower level (department specific) procedure(s).
And do not forget the obvious, to specify how material "enters" and "exits" your designated storage and stock areas. Add the mechanism used by your company that accounts for the material "needs" or "requirements" and you have an inventory management system.