For many years, managers were judged by the standards of personal qualities and characteristics of the work. Typical trait-rating systems rating can list 10 to 15 personal characteristics, such as the ability to deal with people, leadership, competency analysis, decision and initiative.
The list can also be work-related characteristics such as expertise, his ability to carry out missions on the production costs or results or achievements to see the plans and instructions to be executed. But until recently, personal qualities are more than compensated for work-related characteristics. Based on these standards, the expert evaluates subordinates, note the remarkable unacceptable.
A practical approach to the problem of assessment is that, because the assessment does not cover can be objective, managers do not seriously want to use their subjective judgments about a matter of course as important as performance. And employees who receive less than the best grade almost always feel treated unfairly.