Posted by dahsdebater on 10/13/2013 11:37:00 PM (view original):
Based on what? Admittedly, I don't know much about the basketball sim. But there's no way to use the same sort of statistical analysis on basketball defense that's used in baseball defense. What can you use? OFG%? That only truly works in a world with no switching, no screens, and no doubleteams. The reality is that aside from steals and blocks, all of the defensive metrics used to evaluate basketball players are ambiguous at best, and even the nerdiest of basketball fans tend to discuss defense in very subjective terms.
They use a variant of Dean Oliver's work. You could use DRtg, +/- stats, team defense (eFG%), etc. In just about any sport (baseball included) accurately quantifying everyone's defensive ability is tough.