There is a recent increase in the number of studies about SHRM practices and the relationship of these practices
to organizational performance. In comprehensive studies conducted about the relation between human resources
practices and organizational performance have also shown that, there is an undeniable relation between human
resources practices and organizational performance (Wright, Gardner, Moynihan, & Allen, 2005). Although there
are countless studies confirming the relation between HR and performance, empirical studies examining the
mechanism that makes this relation work is are still inadequate (Wright and Gardner (2003). One of the methods to
examine this mechanism is focusing on the role of human resources practices on the organizational commitment of
employees. It is believed that this factor affects the motivations of employees, whether they do the best they can and
finally the company's performance. Wright and Kehoe (2008). studies on the relation between HR practices &
organizational commitment and performance evaluate HR practices singly and as HR system. It is thought that
organizational commitment has singular effects on different variables such as skills, information sharing and awards