A prevailing Agile myth is that we don't do design but as I pointed put in a recent class, design should be continuous throughout development. One of my favourite areas of design occurs between defining the acceptance criteria for a story and going to code. It is here that the team needs to do:
to make sure that we have a shared vision of what it is we are going to build.
We call this the JEDWARD stage...
...cue Doris Day, "Oh, the JEDWARD stage is a-rollin' on over the plains..."