What UML Use Cases to Write? [closed]

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It's been a really long time since I worked with UML Diagrams.

I started working with UML Use Cases again, for a real world project. I would like to ask some questions.

How should I approach writing use cases?

I believe the tasks that leads to a "Major/Bigger" task should not be considered as use cases by themselves. Am I right?

Okay, what if I have a task like View tutorial and it has Comment on Tutorial, Favourite Tutorial, etc. Should these be separate use case, Extending View Tutorial? If yes, but, aren't they small features, why we should include them?

I'm mixing some stuff here, I hope someone could enlighten me .

Thanks!

Answer 1

Read Alistair Cockburn's Effective Use Cases book (see it on Amazon: 1). He does an excellent job of explaining practical use of use cases in a structured and effective way.