“…The guidance for using Table 2 is to mainly serve as quick pointers to publications in which specific AI algorithms have been used in the literature for PHM so as to gain further insight into a specific approach or to aid comparison of research results. (Hong and Zhou, 2012;Baraldi et al, 2015;Aye and Heyns, 2017;Richardson et al, 2017); Sparse Bayesian Learning (Zhou et al, 2012); Adaptive neuro-fuzzy inference system -ANFIS (Zurita et al, 2014); Instance-based learning (Khelif et al, 2014); Kalman Filter (Singleton et al, 2015;Son et al, 2016;Cui et al, 2020); k-NN (Xiong et al, 2015); Particle Filter (Guha et al, 2016;Miao et al, 2013;Su et al, 2017;Chang and Fang, 2019); PCA (Yongxiang et al, 2016); Hidden semi-Markov model (Zhu and Liu, 2018); Light gradient boosting machine ; Sparse coding (Ren and Lv, 2016). Some of the algorithms appearing as being used in only one publication may actually have been used in multiple publications but have been grouped under fusion, hybrid or comparison approaches.…”