Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 14 2 2023 11 12 138 149 Rouzbeh Ghousi Department of Industrial Engineering, Iran University of Science and Technology, Tehran, Iran Fatemeh Ebrahimi 0000-0003-2439-2590 Ahmad Makui 0000-0002-5839-5792 Hasan Sadeghi Naeini Associate Prof., School of Architecrure and Urban design, Iran University of Science & Technology (IUST), Tehran 2021 05 22 2022 08 31 According to the recent reports, human errors may cause major systemic disasters at different levels of an organization. Therefore, the human reliability assessment is an essential and systematic approach to the analysis and reduction of human errors in the industries. The aim of this study is to propose a new approach for analyzing human reliability in order to minimize the defects and shortcomings of conventional methods in this field. The relevant hypotheses of our twelve-step approach indicate that all evaluations are performed at a continuous time and in a varying environment and all variables are independent of each other.in the proposed approach  a combination of techniques (such‍‍ as‍:‍HTA,‍SHERPA,‍Markove‍‍‍&‍‍etc) used for identifying the human errors and to measure the human reliability. To measure the function of this new approach, a case study between 4 milling machine operators in workshops of Saipa Automobile Company for 6 month was considered.. Finally, the results show the ease of use and enough clarity of the proposed approach for the use of analysts. https://ijoh.tums.ac.ir/index.php/ijoh/article/view/516