Transaction SU24 maintains the USOBT_C and USOBX_C tables. These tables hold the relationships between the particular transaction and its authorization objects. It is possible to add or subtract the checks performed in the transaction by changing the appropriate flag.
•The benefit of transaction SU24 occurs when transactions are added to or deleted from Role Groups using the Profile Generator.
•When new transactions are added, the Profile Generator will add all authorization values maintained in SU24 for the transaction(s).
•When deleting transaction the Profile Generator will remove all authorization values that are maintained in SU24 for the transaction.
•Activities performed:
•Check/Maintain Authorization Values
•Addition of Authorization Object to tcode
•Deletion of Authorization Object from tcode
Check Ind.ProposalMeaningExplanation
CheckYSCheck /MaintainedThe object will be inserted along with the values in the role.  The object will be checked along with the values during runtime of the transaction.
CheckNOCheckThis object will not be inserted into the roles.  A check on the object along with the values will be done during the runtime of the transaction
Do not CheckNODo Not CheckThe object will not be inserted into the roles and there will not be any check performed
during runtime of the transaction
Status Texts for authorizations
Standard: All field values in the subordinate levels of the hierarchy are unchanged from the SAP defaults
Maintained: At least one field in the subordinate levels of the hierarchy was empty by default and has since been filled with a value
Changed: The proposed value for at least one field in the subordinate levels of the hierarchy has been changed from the SAP default value.
Manual: You maintained at least one authorization in the subordinate hierarchy levels manually (it was not proposed by the Profile Generator).
Effect of SU24 changes in Role Groups
•Authorization objects are maintained in SU24 for a particular transaction code. When a transaction code is added to role, only the authorization objects having check as check indicator value and yes as proposal value, maintained for that tcode will be added into the role group.
1)  Adding Tcodes to a role
When a new Tcode is added to a role
•When a new tcode is added to a role, going in either change authorization data or expert mode provides the same result. All the authorizations maintained for the tcode at SU24 level is added to the role.
•The program adds new standard authorizations for  objects in the roles If the authorization default values contain objects that
were previously not existing
Or only had authorizations in the status Changed or Manual
•A new standard authorization is not included
if the authorization fields contain identical authorizations in the status Standard in both authorizations, and the fields maintained in the old authorizations are empty in the new standard authorization.
If there were already authorizations in the status Maintained (active or inactive) or Inactive Standard before the merge, the program compares the values and the maintenance status of all authorization fields to determine whether new standard authorizations must be extended.
Changing SU24 values for a tcode
If the authorization data is changed for any tcode in SU24 and tcode is already present in the role, then going in the expert mode with option “read old data and compare with new data” will only reflect the additional changes.Change authorization data will not pull the new data for the tcode maintained at SU24 level
2) Removing Tcodes from the role
When you remove transactions from the role menu, this has the following effect on the authorizations.
•A standard authorization for which the associated transaction was removed from the role menu is removed during the merge, unless at least one other transaction that remains in the menu uses the same authorization default value. This applies both for active and inactive standard authorizations.
•Authorizations in the statuses Changed and Manual are not affected by the merge. They are therefore always retained.