Where is the configuration for whether billing should be order-related or delivery-related found?

The configuration to determine whether billing should be order-related or delivery-related is primarily found in the sales document item category. This is essential because the sales document item category dictates various processing behaviors, including how billing is managed. Each item category can be set up to accommodate different billing strategies, allowing for flexibility in how sales and deliveries are recorded and billed within the SAP S/4HANA system.

Order-related billing applies when the billing document is generated directly from the sales order, whereas delivery-related billing takes place when billing documents are created from delivery documents. The specific item category used in a sales document will define this behavior, including settings for pricing, delivery, and billing processes.

The other options, while relevant to certain aspects of the sales and billing processes, do not specifically control the order-delivery relationship for billing. Sales organization settings generally pertain to overarching configuration for managing sales processes at that organizational level. Billing type definitions outline how different types of billing are treated but do not directly specify the relationship between order and delivery in each instance. Customer master records contain specific customer-related information like payment terms but do not dictate the billing method. Thus, the most appropriate choice regarding the configuration of billing method is the sales document item category.