F Hosseinzadeh Lotfi - Department of Mathematics, Science and Research Branches, Islamic Azad University, Tehran,
Hadi Shirouyehzad - Department of Industrial Engineering, Najafabad, Islamic Azad University, Isfahan, Iran

As human resource have become viewed a more critical to organizational success, many organization have realized that it is people in an organizations that can provide competitive advantage. Thus, human resource performance is very important for organizations. There are a vast number of concepts which may influence employee performance. The main concepts which refer to HRM are job satisfaction, organizational commitment, motivation and turnover. During the last two decades efficiency concept is also posed. Based on this concept, employees with the highest performance are not necessarily the most efficient. In this paper a model related to performance and efficiency concept is developed to calculate the employee efficiency and also determine the factors influence efficiency. Physical working condition, salary, irresponsibility and amount of work are the main factors influence employees efficiency. In order to measure the efficiency, DEA approach is used. An empirical example is also presented to show the capability of proposed model. The study confirms that physical working condition and organizational commitment are the main factors affect employee efficiency. It is recommended that the company find the ways to improve these two factors.

Performance, Organizational Commitment, Job Satisfaction, Turnover, Motivation, Data Envelopment Analysis (DEA)