Is it logical to create an Incremental backup schedule for a RMAN policy

Hi Guys,

I am planning to create a RMAN policy for DBA's.

I guess one would be Default application schedule which i need to keep 24x7 for user initiated backups.

Then there would be automatic backup schedule for backups to be triggered from NBU end.

Now,automatic would be FULL..right ? Do you think i need to create an Incremental backup schedule too ? if yes,,why ? i guess NBU's gonna pick all the data that RMAN is going to provide to it whatsover.(Full or incremantal data picked would be all).

Anybody shed some more light in DB policy schedules ?

Thanks !!!!!!