Scope Application Operation
If Granted Enables operators to mark tag data as questionable. Operators can right-click any basic I/O tag's drawing method, and select the Questionable shortcut menu item to toggle questionable data on and off.
Related Privileges Tag Modify Privilege
If it is your intention to deny operators access to Questionable data, you must deny both the Questionable privilege and the Tag Modify privilege. If the Tag Modify privilege is granted, then the user has access to the Questionable Data shortcut menu option, and the tag properties folder (and therefore the Questionable Data property of the tag). In other words, the Tag Modify privilege includes access to questionable data, manual data, and alarm disable modifications.
If you wish operators to have full access to all of the options available in the shortcut menu for basic I/O tags, you may grant the above privileges in addition to the Questionable privilege.