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Defining Your Own Characteristics 
In the classification system, you can create user-defined characteristics, which do not refer to fields in the project master record.
To define a characteristic, proceed as follows:
The Characteristics screen appears, showing a number of tab pages, including Basic Data.
For your new characteristic to appear in master data maintenance, you must assign it to the class SAP_KKR_CLASS:
This brings you to the Class screen.
The Change Class screen appears, showing a number of tab pages.
If access the WBS in change mode and choose the Summarization function for a WBS element, a list of characteristics appears. The user-defined characteristic appears at the end of the list, ready for input. You can now evaluate it.
