Functionalbeginner
Sales & Distribution (SD): Order-to-Cash Cycle
The end-to-end process from sales order creation through delivery, billing, and payment in SAP SD.
Order-to-cash (O2C) is the SD mirror of MM's procure-to-pay, and interviewers ask about it constantly because it's the revenue-generating process every SAP customer cares deeply about, making it a near-universal functional interview topic regardless of which specific module a candidate specializes in.
Order-to-cash is a relay race with three legs - the sales order is the starting handoff (what and how much), the delivery is the middle leg (getting it physically out the door), and billing is the anchor leg that crosses the finish line by turning the shipment into recognized revenue and a receivable.
Key Concepts
1
The cycle begins with a sales order (VA01), which captures the customer, materials ordered, quantities, pricing (derived through the pricing procedure, a sequence of condition types like base price, discounts, surcharges, and tax that calculate the final net value), and delivery scheduling. Availability check (ATP - Available to Promise) runs during order entry to confirm whether requested quantities and dates can actually be met given current stock and planned receipts, and can trigger backorder processing if not.
VA01
2
Once the order is ready to ship, a delivery document (VL01N) is created referencing the sales order, which drives picking (in a warehouse-managed environment, triggering a warehouse task or transfer order) and packing, followed by post goods issue (PGI) which reduces stock and posts the cost-of-goods-sold accounting entry - the SD equivalent of MM's goods receipt in terms of triggering a real-time financial impact. Billing (VF01) then creates the invoice referencing the delivery (or directly the order for non-stock/service items), posting the revenue recognition entry and creating the customer's accounts receivable open item.
VL01NVF01
3
A strong answer connects this back to the copy control concept - the rules governing which fields/quantities carry over from order to delivery to billing document (and whether a document can even be created with reference to its predecessor), and mentions the three-tier document flow (order -> delivery -> billing) as the standard structure interviewers expect a candidate to draw out even in a whiteboard-style question, along with credit management's role in blocking orders that would exceed a customer's credit limit before they're even allowed to proceed to delivery.