Carol
Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
Welcome to Benefits and Work Whilst most assessments are about an hour they can be longer.
You don't say what benefit this was for?
If PIP Then you should be able to requests copy of the assessment report by contacting the DWP office dealing with your wife's claim. If ESA then you will have to wait until the Decision in made, in either case a Decision should be about 3-5 weeks.
Gordon