Common Requirements Errors

I'm currently working out some templates to be used in our software development process, and I read this interesting study:

The common types of requirements errors:

49%  -- incorrect assumptions

29%  -- omitted requirements

13%  -- inconsistent requirements

 5%   -- ambiguities

 

There are so many errors occurred just because of the incorrect assumptions!! It shows that we really shouldn't make assumptions. Whenever we are going to gather or analyze requirements, I guess it's good for us to remember these points. ^_^