> 1. If I am trying to model a large number of use cases can I create a
> high level use case diagram with say 4 use cases and then expand each of
> those use cases in a separate use case diagram. For example:
> Can I have a use case in my high level use case diagram called 'Manage
> system', and then have a separate use case diagram for 'Manage system'
> showing 8 or 10 use cases?

Well, yes and no. Functional decomposition is exactly what you want to
_avoid_ when modeling with use cases; you can't create "high level use
cases".

But on the other hand you are allowed to group use cases, actors and
use case diagrams into several _packages_ - and thus accomplish what
you seem to want.

> 2. If this is the correct way to model a large system how do I do this
> in Rose? I have tried creating the above scenario but Rose will not let
> me put the 'Manage system' use case in a sub-folder by dragging and
> dropping it onto the navigation screen on the left.

Well, it isn't the correct way - so...:-)

> 3. If this is wrong how do I draw a use case diagram say with 40 or 50
> use cases?

You can have a large number of actors and use cases in your model without
necessary having to put them all in one big diagram, although some SoDA
templates. A use case diagram is not the same thing as a use case model,
and you don't necessarily need a use case diagram giving a global view of
all use cases and actors in the system.

A use case model is the collection of all your use cases, actors,
associations
between use cases and actors, and all use case diagrams created, to model
the functionality of your system.

Best regards,
Jan Frederik Solem <[EMAIL PROTECTED]>


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