Evaluation of Internal Control in Parsian Gas Refinery Company According to the Proposed Framework of COSO 2013

Designinhg and implementation of internal control systems is among the most necessary requirement of financial abd accounting scope. Different models have been proposed to assess internal controls among them the COSO model is the best-known and most common. COSO model defines internal controls as the processes that affected by the board of directors, management and staff in order to provide reasonable assurance regarding the effectiveness and efficiency of operations, and also reliability of financial reporting with the laws and regulations. This research is a case study on the Parsian Gas Refinery Company. Data gathered through designing and distribution of a 5 point Likert-type questionnaires. Questionnaire was designed according to the Coso framework and adjusted by the opinion of experts. Research hypotheses designed according to the COSO model in 5 main hypotheses about effectiveness of control environment, risk evaluation, control activities, information and communication, and monitoring. Statistical techniques which are used for testing the hypotheses were test of normality, reliability and comparison of means. The results of testing the hypotheses showed that the internal control of Parsian Gas Refinery Company system work effectively. Also, the friedman test shows that commitment to competent, recognition and evaluation of risk, selection and development of control activities, internal activities, development and continuous assessment were the most important component in applying internal controls.