This is an interesting approach to ensure at sustainable productivity through the year. It covers different rhythms as it should: daily, weekly, yearly. If you read between the lines you can tell it tries quite hard at keeping stress at bay. I think I'll even try to apply some of that with my own adaptations (it's not strict rules more like guidelines, clearly needs to be adapted to your job, for instance "only" 4 hours of knowledge work per day would feel low in my context).