Five years is a long time in the drafting world. It’s longer than the vast majority of college players’ amateur careers with their schools. It’s longer than a lot of NFL front office’s regimes, especially if those regimes happened to be located in Berea, Ohio (aka the Cleveland Browns).
To look over a five-year body of work in terms of draft history, then, is a decent chunk of information to sort through, though of course the closer you get to the present, the less data you have on the most recent draft picks.
Pro Football Focus has recently taken the approach of looking back at the past five classes for teams and sorting their picks between their most and least productive, and they recently took a stab at this process for the AFC North division, which necessarily includes the Pittsburgh Steelers.