For cases where you need to produce an immediate delivery from the sales order, such as in same-day delivery scenarios, SAP offers the rush order special order type. A delivery document is generated as soon as an order is saved, at which point the warehouse can begin fulfilling it. The delivery document is used as a reference for creating the billing for rush orders, and the invoice document is also used to generate the billing output.
The only significant difference between a rush order and a standard order (order type OR) in terms of customization is that the delivery document for a rush order is immediately prepared. You use the transaction code VA01 to create a rush order. The rush order cycle is represented in standard SAP by the sales document type SO, default delivery document type LF, and default billing document type F2. All the item categories that you typically use with a standard order, such as TAN, TANN, and so forth, are still available.
The shipping terms from the document type take precedence over the payer's customer master in cases of cash sales or rush orders where immediate delivery occurs.
Figure 1 Sales Order Type View – SO
