Everything about the NFL Draft is subjective. The selection of one player over another is little more than an educated guess, and even teams that have drafted the best players of all time are victim of taking some of the worst.

How do you measure it over the course of time?

DraftMetrics.com, a site written by Tony Villiotti, a self-professed "retired old geezer with plenty of time on his hands," is also a self-professed Steelers fan.

His piece on the last five and 10 years of the NFL Draft looks to put some science behind the art of player selection.

Weighting four categories, Villiotti ranks each team's overall draft success from 2003 to present and 2008 to present.