Credit rating of the bank legal customers by using the improved modified Russell model (Case study: the legal customers of Arak Melli Bank)

The most exchange volume in a country will be obtained through bank system whose correct function will have a determinant role in improving economic activities. Nowadays, the customer’s rating and accreditation subject has been considered more than before by the banks due to increase the volume of overdue claims and banks’ past over dues. One of the most important tools for controlling the banks’ credit risk is to implement the credit rating system and to recognize effective factors on withholding payment of the bank advances. The goal of this article is to investigate the relation between efficiency and risk in banking system. Based on this, with the help of data envelopment analysis method and the information related to evaluation, rating and interpretation of credit risk which has been suggested by three main rating institutes like “Fitch, Moody’s and Standard and Poor’s”, the credit risk of 24 legal customers of Arak Melli Bank was evaluated and the credit rate of each legal companies was determined and their quality analysis was expressed.