Songa, A., Rajagukguk, W., & Tewu, D. (2026). An Analysis of Operational Risk Management in the Appointment Process of School Principals at Foundation X Based on ISO 31000:2018. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), 9(1), 8036-8046. https://doi.org/10.31538/iijse.v9i1.9011