See this movie (via Core77) for a great description of a design process. Although I never designed a product that is not software, the process described in this film is so familiar and so similar to a software UX design. It is both trivial and surprising.

The movie presents the following process:
Designer gets to know the users (e.g. bike riders), their needs and consider the experience they are looking for > sketch a few options > prepare a rough model > test it.
Then designer take the results to the computer, make a mockup and add details (e.g. detailed design) > prepare a detailed model > and test it.  >> Iterate and redo this until they achieve user satisfaction.

If you think this is simple – try to pull it off in a software company J

I loved the last comment about the “wow” reaction when you see people using your design (and enjoy it), this is why I’m in this business, and Muller expressed it exactly as I feel it.