Grad school ranking as a function of Undergrad school ranking?

The assumption I’m making is that the other 2000 or so schools are irrelevant in this analogy because they don’t offer engineering. Engineering students can’t be distributed amongst schools that doing have engineering programs. Since, with the rare exception of the odd physics student here and there, students from the other 2000 don’t make the jump into engineering graduate programs, those schools shouldn’t be included in the metric.