BOM Usage 
BOM Usage
Many companies have only one universally applicable BOM structure for all areas of their company. This structure usually takes the form of complete single-level BOMs, created in the design department, and used in both material management and the assembly workshop.
The R/3 System allows you to maintain individual BOMs for any area of your company. These BOMs are maintained independently of each other and are assigned different internal BOM numbers. In this way, each area is only dealing with the specific data it requires.
In Customizing for Production, define individual BOM usages for the different areas within your company by choosing Basic data
® Bill of Material ® General data ® BOM usage ® Define BOM usages.You can define BOM usages for the following scenarios:
See also:
BOM Usage as a Special View on a BOM Defining the Item Status with the BOM Usage BOM Usage and Material Type