Creating Single-Level Work Breakdown Structure BOMs 
Use
You require a BOM in order to plan and produce a production lot and to determine its costs. You can use an existing material BOM, create a work breakdown structure BOM for each individual production lot or you can use one work breakdown structure BOM for several production lots of a material.
Prerequisites
You have
Created Production Lots and maintained the necessary control data during the creation.Features
The components of material or work breakdown structure BOMs, which have already been created, can be copied and adopted in the initial screen.
Activities
The initial screen appears.
Choose Enter. The Material Item Overview screen appears.
Save your data.
To change or display the single-level work breakdown structure BOM, starting from the Bill of material menu, you choose: Bill of material ® WBS BOM ® Single-level ® Change or Display.