1st step in case of Delta Failure!!

Hello BW Experts,

What is the very first step that we should do in case of a delta failure?? That could in the process chain or a normal manuall;y sheduled delta load!!

When do we decide to go for a Re-Initialization of delta??

Plz provide the basic step-by-step procedure to handle thses situations!!

Thanks & regards,

Sapster.