score:7
towards the end of the sutta, Buddha talked about daily progress of Dharma development. My take on it, it is hard to track quantifiable progress daily. You just know. Though the sutta talks about effluents in general, it might be applicable to meditation as well.
Just as when a carpenter or carpenter's apprentice sees the marks of his fingers or thumb on the handle of his adze but does not know, 'Today my adze handle wore down this much, or yesterday it wore down that much, or the day before yesterday it wore down this much,' still he knows it is worn through when it is worn through. In the same way, when a monk dwells devoting himself to development, he does not know, 'Today my effluents wore down this much, or yesterday they wore down that much, or the day before yesterday they wore down this much,' still he knows they are worn through when they are worn through.
Upvote:2
It is unrealistic to project a quantified mindset onto early Buddhists. They didn't have paper to write on. They didn't have writing. Without writing, math must have been rather limited, let alone mathematical thinking. Later on, Buddhist universities developed logic, which is a sort of propositional math. There were whole manuals for Buddhist logic exercises. In Mahayana, there are sutras with chapters that discuss powers of 10 and extremely large numbers (Avatamsaka is one).
My personal thoughts on the matter
I recently started using beeminder.com to track my meditation. I give my self a point a day for meditating. If I'm derailed on my goal, I pay a small fine.
The most measurable things are going to be inputs, e.g. minutes meditating. The outputs might be measurable using techniques of modern psychologists, by say by writing 20 similar questions that elicit if you are exhibiting this or that quality. Adding up the "yes"es is a score of the outputs of contemplation. Even in psychology, these metrics are controversial as to if they really measure what they purport to measure.
Measurable Practices
In the universe of all Buddhist practices, some are more measurable that others (keep in mind, I'm not promoting any of these, just making a comment on what Buddhist broadly defined do that is quantifiable)