If I understand it correctly you are not able to find the field label that you can see in the UI in analysis formula. You can check your documentation for technical field name for the field label you see in the UI or in case it is not available you can get it from ariba support team by submitting a Service Request through connect.
Thank u Vilas..
I will do it.
Can i write my formula in sql query?
For example : If <field> = "aaa" then "bbb" ?