Segmentation Structure 
A segmentation structure is a combination of two or more segments of any material. For example, a segmentation structure can be a combination of quality, customer channel, and country of origin.
Segmentation structures are defined in the Customizing for Define Segmentation Structures under
Note
You have defined segmentation relevant characteristics using Master Data Characteristics Management (transaction CT04). For more information, see Maintain Segmentation Relevance for Functions.