The key is to assess FOR learning as opposed to assessing OF learning. This involves a shift from a test of some kind which involves evaluation to a more focussed reflection of both process and understanding. This kind of approach will certainly give us a clear approach of understanding but with effective, organic use, it will also inform us of the learning including forward planning and next steps as well as how we may measure future learning.
I am keen to look further in authentic, challenge-based types of assessment. These require the learner to apply their learning and transfer knowledge and skills to a range of situations. The trick will be to ensure that the data gathered provides us with enough information to move forward. At the end of the day, the assessment will only be useful if it informs the learner, their family and the mentor with "What's Next?"