Reference #138: Peopleware
For measures of variation in performance, the following rules of thumbs apply over a sample of individuals:
- The best people outperform the worst by 10:1.
- The best people outperform the median by 2.5:1.
- The better-than-median half outperform the other half by more than 2:1.
DeMarco, Lister. Peopleware, 2013. (44)