fa عمومى General پژوهشي Research Efficiency measurement is critical for industries where firms do not face strong competition, as we cannot rely on the market to discipline the firms' efficiency. Railway is a typical example. At the same time the fact that railway produces multiple outputs using the common set of inputs calls for a delicate and sophisticated treatment in measuring the efficiencies. In this article, the DEA method is used to determine RAI (RahAhan Iran) efficiency comparison with other countries. The scale efficiency rate of RAI was calculated and showed the percentage of 0.564. Finally, by analyzing this performance, a suitability in inputs and outputs for reaching the efficiency boundary was resulted. 1 7 http://ijorlu.lahijan.iau.ir/browse.php?a_code=A-10-2-5&slc_lang=fa&sid=1 M. M. Movahedi m_m_movahedi@iaufb.ac.ir 100319475328460056 100319475328460056 Yes Department of Management, Firoozkooh Branch, Islamic Azad University, Firoozkooh, Iran S. Y. Abtahi, 100319475328460057 100319475328460057 No Department of Economic, Science and Research Branch, Islamic Azad University, Yazd, Iran. M. Motamedi 100319475328460058 100319475328460058 No Department of Management, Noshahr Branch, Islamic Azad University, Noshahr, Iran.