Scheduling agreements

Dear Gurus,

I want to configure scheduling agreement scenario in our company . Till now we were using sales orders. Ours is a automotive component industry we dont use JIT . i would like to know what standard doc types , item categories & schedule like categories i need to take.

I would like to know the difference between Sales doc type for scheduling agrrements LZ (Sched. Agr. w / Rel) and LZM (SchedAgrt w/Dly Ord)

Regards,

Dippy