I am currently preparing use case descriptions for a software specification. For most use cases, I have several actors who can perform the use case. But some basic flow steps of a use case are only available to one of the specified actors.
Example For example, I have an "Edit task" use case. Normal users can edit the task information or mark the task as done. Admin users can additionally archive the task.
I have so far specified this through the business rule for that basic flow step, so: Basic Flow Step: "The user archives the task." with corresponding business rule "Only Admins".
Can I use one use case description for both actors and just differentiate singular functions / basic flow steps like described above? Or do I need an extra use case for each function, as minor as it might be, to differentiate between the actors?
Best regards