Actually it started out as a 2x2 matrix (scope/schedule), and all of them were scope = flexible and schedule = inflexible (of course), and they started adding t

Actually it started out as a 2x2 matrix (scope/schedule), and all of them were scope = flexible and schedule = inflexible (of course), and they started adding the "resources = flexible" row so that they could walk back their claims of scope being flexible, because of course it wasn't.