Nur Maisarah Mohd Sobran and Zool Hilmi Ismail 2023. A Systematic Literature Review of Unsupervised Fault Detection Approach for Complex Engineering System. Journal of Advanced Research in Applied Mechanics. 103, 1 (Apr. 2023), 43–60. DOI:https://doi.org/10.37934/aram.103.1.4360.