Assigning MRP Groups to a Grouping WBS Element 
Use
You define the area of validity for a grouping WBS element by assigning the MRP groups, for which the grouping WBS element is to be used, to the grouping WBS element.
Prerequisites
- You have created valid MRP groups and assigned the materials.
- You have created grouping WBS elements and have entered the indicator 2 the Grouping WBS element field.
Procedure
Starting from the SAP menu, choose Logistics → Project system → Material → Planning → Requirements grouping → Assign MRP groups.