Virtually all authors have implicitly or explicitly treated the "black box" as a linear causal process consisting of one or more smaller boxes, however the number of boxes in the "black box" and the content of each box differ in each model. Due to various approaches the mechanism by which HRM practices are translated into competitive success is complicated and not well understood till now, however some general trends could be highlighted.Purpose -Theoretically to discuss the causal pathway by identifying mediating variables in HRM and performance link.Paper object is the content of the "black box".Research method. The paper is built on the analysis and synthesis of scientific literature on HRM and performance link.
HRM and performance linkAcknowledging the relevance of all types of resources to contribute to excellent performance, researchers emphasize that in the context of globalization human resources are vital to achieve success in the most effective and efficient ways [28]. It is generally accepted that "people are the key assets in the new world market and that all other assets are nothing more than commodities that can be purchased at market prices, because only the human asset has potential to learn, grow, and contribute" [29]. However, there is a continual debate as to what in particular provides value to the organization -human resources or their management [30]: 1) some authors maintain that sustained competitive advantage lies in the human resources and not in HRM practices per se, as the latter are well known; 2) other authors, though, highlight that competitive advantage is created through HRM practises and not human resources, as it does not suffice to hire best people in order to gain the competition; 3) third group of authors suggests a unifying approach to the critical role of both human resources and HRM in the enhancement of sustaining of competitive advantage.