Employers are overhauling employee evaluations to better separate top performers from underachievers, The Wall Street Journal reports. Hewitt Associates estimates 10% of managers and 11% of other employees are now judged solely on the results, as opposed to a mix of results and softer metrics such as showing leadership, up from 7% and 8% five years ago. Nearly a third of execs are judged solely on results, up from just over a fifth in 2005.