Creating Authorization Fields 
In authorization objects, authorization fields represent the values to be tested during authorization checks.
Procedure
Start Edit Authorizatio Fields (transaction SU20).
Choose
(Create New Authorization Field).On the next screen, enter the name of the field.
Field names must be unique and must begin with the letter Y or Z.
Assign a data element from the ABAP Dictionary to the field.
NoteThe data element must be defined by a domain.
End of the note.If desired, attach a check table for the possible entries.
The link provides possible field values. You can also define a value range by way of the area with which a field is associated.
For more information about AUTHORITY-CHECK, see the keyword documentation of the ABAP Editor.
Note
You can often use the fields defined by SAP in your own authorization objects. If you create a new authorization object, you do not need to define your own fields. For example, you can use the SAP field ACTVT in your own authorization objects to represent a wide variety of actions in the system.