Advance Sales Process

Dear All,

I need to configure the advance sales process in SAP.

As SAP don't have any specific procedure in advance sales, so I prefer to have it through down payment request.

My client is selling tangible goods (Chemical product) to customer, so is it possible to deal the scenario with down payment process, as in many thread i read it can only be applicable for order related billing not delivery related, please suggest on this.

And is there ay other way to perform the cycle in the system, looking forward for the feedback, thanks.