You set the processing options for the Style Item Master program (PCW51) to specify how the system creates all of the child style items from these variations. Based on the processing option settings of the Style Item Master program, the system creates child style items using one of the following methods: 

• Automatically. The system automatically creates all of the child style items after you specify the item details and item structure information for the style item root level 0. The system creates child style items automatically when you exit the style item root level creation process.
• On demand. You create the child style items at the end of the item creation process. After you specify the item details and item structure information for the style item root level 0, click the Create Child Items button on the Item Structure Definition form.
• In batch. You run the Create and Process Child Style Items program (RCW01) to create the child style items after you specify the item details and item structure information for the style item root level 0.