Final answer:
When goods are not available in customer master data, a back order routine is initiated to manage the situation, either by restocking or informing the customer of a delay.
Step-by-step explanation:
When a customer master data check shows that the goods requested on a customer order are not in stock, a back order routine is typically initiated. This routine involves documenting the items that are out of stock and then either placing an order with the supplier to restock the item or, if the items will be available soon, informing the customer of the expected delay and arranging for the items to be shipped when they become available. The decision to initiate this routine typically depends on the company's policies regarding inventory management and customer service.