Export Process

Dear All,

Is it necessary to have export process in the following way

Sales order -. Outbound Delivery -. Proforma Invoice - Excise Invoice

' ' - Invoice

That is is it necessary to have a proforma invoice for the export process. what is the neccesity for it.

or can we have the process in the follwing way

Sales order -. Outbound Delivery -. Invoice - Excise Invoice .

please clarify.

Deepak