“Using the Six Sigma Methodology As an Internal Control System to Improve the Quality of the Internal Audit Process: An Analytical Study of a Sample Opinions of the General Company for Fertilizers Industry - Southern Region Employees”. Entrepreneurship Journal for Finance and Business, vol. 7, no. 1, Mar. 2026, pp. 89-101, https://doi.org/10.56967/ejfb2026630.