Key Figures for Material Usage (S026) 
The key figures for S026 (Material usage) can be created for production orders and for repetitive manufacturing.
When creating/changing a production order material reservations are produced for the material components from the bill of materials, that is, a requirements quantity is determined.
When creating actual data in repetitive manufacturing, the bill of material parts are updated as a requirement quantity before making a change.
With a goods issue for a production order or creating actual data in repetitive manufacturing, the material usage is updated for the components.