title: How Do You Keep UML Diagrams Up To Date?
body: <p>I am from a Physics background and not a Computer Science background and never did any course at University on class/component diagrams etc and I have never found the need to use them at work.</p>
  
  <p>The main thing that I don't understand is how do you keep them up to date if the code is still being developed or maintained?</p>
  
  <p>e.g. What's to stop me from refactoring several methods or classes and making the class diagram obsolete? </p>
  
  <p>Do you have to constantly update the diagram manually?</p>
  
  <p>I have seen tools that generate UML from the code and these could keep it up to date I suppose but from what I have seen, the auto-generated diagrams don't seem to be useful enough.</p>
  
  <p>Is the UML for a project likely to be created at the start then be left in a documentation folder and gradually get more and more out of date?</p>