title: Class diagram during system analysis and design
body: <p>Can someone explain me the difference between class diagram during analysis and design? </p>
  
  <p>So far, I understand that the class diagram of design would be the real class diagram, with all methods and attributes (ready to become code), but what about analysis? Do I have to do a class diagram for every sequence diagram? Do I have to add methods and attributes at the design stage already ? Or only connection? </p>