Efficiency appraisal and Rating of Decision-Making Units (DMUs) in Automotive Industry using Data Envelopment Analysis: A case study of Tehran stock exchange

Efficiency appraisal of the companies existing in automotive industry is an important not only for the researchers, but also for the financial managers and also investors because it can reduce the risk of investment, noticeably. In these situations, investors need information to facilitate the investing process. One of the ways that can be used in this regard is evaluation and ranking of the companies. With using data envelopment analysis. Data Enveloping Analysis is one of the scientific methods that calculate the performance using a mathematical basis. Data Enveloping Analysis, a non-parametric method is a peripheral (radial) criterion for performance evaluation in primary model of data enveloping analysis a complete ranking of the Determining Units. the goal of the study is to do a comprehensive appraising and ranking of the companies in Automotive Industry and Manufacturing the Parts in order to selected input and output parameters using non-parametric approach into two categories of efficient and inefficient and the companies they are inefficient in this research and in the result advices was said to other companies for achieving point of efficient. Finally, among the selected companies in the automobile manufacturing industry, Zamyad Automobile Manufacturing Company with the efficiency score of 1, was determined efficient and became selected as the model company for other companies. Among the selected companies Niroo Moharekeh Company showed the poorest performance and took the tenth rank among the selected companies.