I have this diagram. The staff receives an email when his letter is approved. Do I need add an include relationship between two use cases? If I did that, it means the staff needs to approve letter to ...

I want to create a use case diagram based on customer requirements (pnline food ordering system), which are for example ensure on-time delivery process and package orders promote the pizza shop How ...

Can an actor be both primary and secondary in an extended management system? e.g. Warehouse worker [use case] displays the list of orders to be packed (as secondary actor), then [use cases] packs the ...

I have to create Use Case Diagram for Pizza Shop System. I have doubts whether I fully understand the use case assumption. Are logging into the system, logging in as an administrator or creating a ne...