Delivery and billing

Dear gurus,

what is collective delivery what all the conditions it should fulfil and what is the transacation code to do this

what is delivery split what all the conditions it should fulfil adn what is the transaction code to do this

what is collective billing what all the conditions it should fulfil and what is the transaction code to do this

what is billing split what all the coditions it should fulfil it and what is the transaction code for it

please give detail notes with examples

rewards will be assured

thanks n regards

srinivas