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I'm working on a project right now and it's my first project using BDD. Up till now, the user stories have proven themselves a very valuable weapon to understand requirements and to specify the solution in a comprehensive, easy to understand language.

My question is this: now that my user stories are complete, how do I design my solution? I understand that I derive behavior tests from my user stories, and I have to do UI design, but am I supposed to use good ol' UML? I'm under the impression that when using user stories, UML is left out; is this correct?

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You might want to provide a link to a definition of BDD or even state outright what BDD is in your question! My first hit searching on Google is not Behavior Driven Development, if that's what you mean. –  GlenPeterson Nov 15 '12 at 3:45
    
Yes, I'm referring to Behavior-Driven Development. :) –  Léster Nov 15 '12 at 13:08
    
user stories show what to do , uml shows how you do it. long story short: you need both. –  devnull Nov 15 '12 at 13:43

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In general userstories are requirements from the customer point of view that most of the time say what to implement (= features) but not how to do it (design, workflow).

If you want to create a new app out of nothing (greenfield-soulution) in a agile/scrum-like manner out of existing userstories i would suggest this workflow:

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So, with the user stories I build a map detailing order and interactions, then I make UML diagrams as needed, and then I start building my tests. Am I getting this right? –  Léster Nov 15 '12 at 18:44
    
i am not shure if you realy need uml diagrams. most of my projects lived happyly without them. –  k3b Nov 18 '12 at 13:03

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