Over the past two years, I've been working on specific grading criteria for each belt level in my BJJ classes. Previously we had always just based grading around how students were performing during sparring in class or competition success. This had also always been the case at the schools where I'd trained over the years.
Over the years I noticed some problems with this system. Firstly, students who were more athletic could get away with doing very well in training and competition for the first few years but never developed the correct technique so would often quit once they reached the higher belts. Secondly, the lack of structure and criteria of exactly what you need to know and be able to do at each belt level often lead students to lose interest and motivation.
This is the current Promotion Criteria that I use for Promotion from White to Blue Belt and Blue to Purple Belt. Students are tested on these techniques on Grading Day and are also tested in rounds of sparring including Positional Sparring and Line ups where they have to roll with fresh opponents one after another for a set period of time.
The Grading requirements are still a work in progress and I have been adding and removing some techniques at each Stripe and Belt Level since I began.