Dhiyaa, A., Hadi, A., Ahmed, A., Hassan, M., Salim, N., & Hadher, G. (2026). Assessing the impact of excluded risks on cost and time of construction projects in Samarra using the relative importance index (RII). Samarra Journal of Engineering Science and Research, 3(4), 1-19. https://doi.org/10.65115/x2q6mt60