Delta Management

Hi Guys,

I need some info on Delta Management.

Case 1: When we are laoding Intialization load frmo R/3 and if it fails whats the procedure o overcome this?

Case 2: When a delta fails, how to overcome this? Do we need to run the Initialization load again?

Case 3: What's Repeat Delta concept. When do we ue it?

Thanx.