Emovon, I., and M. Okechukwu Okwu. “Comparative Study of the Use of Arithmetic Mean and Geometric Mean for Data Aggregation in FMEA Analysis”. COVENANT JOURNAL OF ENGINEERING TECHNOLOGY, vol. 1, no. 2, Dec. 2017, https://journals.covenantuniversity.edu.ng/index.php/cjet/article/view/704.