Thanks a lot for the comment. Yes, I admit there are some nuances that should be better framed, and that sometimes methods and technologies overlap and get confused. I should have probably defined them as techniques or ensemble of methods.
I am not sure whether in the middle there should be solution outcomes, since it would be too close to the problems solved (which it the y-axis), but I get your point.
It is not by far a perfect representation, just something I found useful for myself at first to frame different technologies and still require a lot of work for sure :) Furthermore, believe me if I tell you that I struggled a lot in plotting everything on a 2by2 matrix!
Thanks a lot for the comments and I will be sure to embed them in the next version of it!