One step and two step stock transfers

Hi

I got information and configurd steps for one step and two step stock trasfer for intra and inter company through different threads but am confused where we configure movement types.

I have understood in one step GI and GR will happen at a time where as in two step process GI and GR has to be done seperatly or manually. Pls any body tell me where these steps happens at end side and where we have to configure these movement types i.e to happen automatically ( do we need to assign movement types in schedule line cat or while goods posting or receiving in enduser level) . what would be the ideal scenarios to use one step and two steps.

Regards