The ‘fast assessment’ is used when you have already done your assessment on paper and just want to enter the data electronically. It’s exactly the same as a regular assessment but instead of having to click through all of the screens, you can enter all scores on the one screen, making the process faster.
The regular assessment gives you all of the descriptors for each level as you are scoring whereas the fast assessment assumes you have downloaded the manual and scored on paper.
If you like the idea of being able to do your assessments on paper, you can download the manual and paper score form from the Help and Downloads section after you login.