This video tutorial offers a comprehensive guide to understanding the Availability Check in SAP S/4HANA Sales and Distribution (SD). The speaker walks through the process in a clear and detailed manner, providing step-by-step instructions. The tutorial covers a wide range of topics, from the basic concept of the Availability Check to the various settings that influence its functionality. Here are the key takeaways

1. Meaning of Availability Check: Availability Check, also known as ATP (Available to Promise), is an important function in sales order processing. It checks the available quantity of the ordered material before confirming a sales order. The option for Availability Check is maintained in the Material Master Record under the General Plant Data and Sales.
2. Settings for Availability Check: Various customizing settings influence the scope of the Availability Check. The check is performed on the Material Availability Date. Two factors determine the Availability Check within the sales order: the Material Master and the customizing setting.
3. Control of Availability Check: The control of the Availability Check depends on different inward and outward movements. The system considers the available stock, upcoming goods received for the purchase order, any purchase requisition in the system, and any planned order in the system. It also considers existing sales requirements and any reservation of the product.
4. Transfer of Requirements: After confirming the delivery date, the system sends the requirement from the SD module to the MM module. The MM module then starts the procurement process, which could be an external procurement or in-house production.
5. Complete and Partial Delivery Setting: The setting for complete and partial delivery in the Business Partner data plays a significant role in the Availability Check. If the complete delivery setup is maintained, all items in the sales order will be delivered in one go. If the partial delivery is allowed, goods can be sent whenever they are ready or whenever the stock is available.
6. Difference Between Data Maintained in Business Partner and CIR Record: The settings maintained in the Business Partner and Customer Information Record (CIR) can influence the Availability Check. However, the settings in the CIR take priority and overwrite the settings from the Business Partner.