Thomas Andrews devised this honor count for evaluating hands specifically for 3NT contracts.
His point ranges are as appears in the BidBase Hand Evaluation System database.
The nice thing about [this] evaluator, (A=4, K=2.8, Q=1.8, J=1, T=0.4) is that the total count in the deck is still 40. I call this evaluator the "Fifths" evaluator because you take [4321 HCPs] and subtract one fifth for each king and queen, and add two fifths for each ten.
For a discussion of the theory, analysis, and examples,
see Andrews' web page.