Hi Vinny,

If you're looking at UML to provide guidance on the sequence of diagrams, you won't find it.  UML (Unified Modeling Language) is just that: a modeling language.  It does not provide guidance as to which diagrams to use and in what order.  That is the job of a methodology.  Of course, this doesn't make your life much easier as there isn't just one methodology but many.  And to add insult to injury, most organizations user their own proprietary methodology or a combination of common methodologies.

To start, you can take a look at RUP (Rational Unified Process) as it describes one way of doing things.  It's not the only way.

Here's an online resource for RUP: http://www.ts.mah.se/RUP/RationalUnifiedProcess/

Also - take a look at IIBA's BABOK (Business Analysis Body of Knowledge)

- Adrian