Is it possible for a use case to have more than one actor? And if it is, do you know of a good reference where I can find that information (book, webpage) because I am having a problem with a diagram I made for a test. Thanks.
Although the UML spec allows to use multiple actors an despite the fact that I have used primary and secondary actor(s) in use cases in the past I have come to the conclusion that a use case shall have only a single actor. When you go down to that paradigm you will find that the use case cut is much easier and clearer than when using multiple actors. Please see the following slides that explain this in more detail: http://de.slideshare.net/putchavn/usecase-case-is-a-dialog-not-a-process