When the HR job is considered in terms of its any constituents, it becomes noticeable that in every organization there are many different interacting groups that HR managers must gratify, or who have rights or a stake in what HR does. Furthermore, each comes with different and sometimes conflicting needs. It costs money and time. The most organizations try to economize with maximal effect. A way how to eliminate or reduce unnecessary expenses is making internal processes more efficient. The most expensive even the most productive factor is labor force. This paper deals with evaluating of human resource effectiveness like potential source of competitive advantage.