The Effects of Accounting variables on Economies of Scale in banksusing Theory of Constraints

The Theory of Constraints (TOC) is one of the techniques of decision making in strategic management accounting(SMA) and theorizing of performance evaluation With a systematic approach to the firm and in line with the strategy of cost leadership,thinks with the growth strategy.The use of TOC in the explanation of Economies of Scale (ES), which are the concepts of management economics, Can lead to system thinking in the banks.The concept of ES refers to the change in the production of products for the change in inputs and the benefits of lowering costs as a result of increased volumes of output.In this research, ES of 17 banks of the country during the period of 1386-1396 was calculated based on the TOC approach. Using the Translag Model and the Frontier 4.1 Software,The average ES of the banks of the country based on the TOC were estimated 0.16.The findings of this research indicate that the banking system of the country has a scale of economies,But it does not fully exploit the potential and continues to operate below the potential capacity,Which is more severe than the Theory of Constraints.Also, according to the results of the research, there is a reverse relationship between the ratio of equity to assets and Economies of Scale of banks using the Theory of Constraints (ES-TOC); As equity increases, the amount of economies is reduced to a scale, and Considering the smaller one of its being, banks will continue to be in a position to economies on a larger scale and increase potential capacity.