How many stories do I need (eg. what is the granularity) ?
For a typical project of 6-12 months, 50-100 stories would be a good number. If you have too few stories, it gets difficult to define priorities (if you have only 3 stories, the user will never say “ok, we need the third story only in the next release”). If you have too many stories, the handling gets more difficult (the pile of paper gets to high, it will be impossible to order all stories on one table (unless you have a very big table)), to a degree where you won’t use them anymore!
