The video conferencing use case has not been reviewed because it has been deferred to the next iteration. No spelling or grammatical errors were found. The use case has a self explanatory and unique name. There is however, a big mistake in the description of the use case. It is not based on a customer requirement as in the administrator is not responsible for adding new users.
Users have to pick their own user name and password.
Therefore the actors involved in this use case include only the user and not the administrator. This should be designated top priority. Because of this fundamental defect, the representation in the use case diagram is also erroneous The description also makes reference to the user interface by referring to tabs . Use cases should be described, with as little reference as possible, to the user interface. The point at which the use case begins should be more specific with respect to how the customer gets to the signup screen.