I am, for example, building a Rope Walk.
I have q18 boards, q10 blocks, and a pile of string with an average q of 30.
Do I expect (180 + 80 + 600)/38 = ~q22 Rope Walk?
Or do I expect (18 + 10 + 30) / 3 = ~q19 Rope Walk?
In other words, do materials that have higher quantities in the recipe contribute more to quality?