“…That is, a situation where some of the knowledge required to make the decision is tacit and thus cannot be represented by data in an algorithm or other computerised methods. As shown in the literature review, several methods have been proposed for the clustering of maintenance (Assaf and Shanthikumar, 1987;Cui and Li, 2006;Dekker and Smeitink, 1991;Hu and Zhang, 2014;Li et al, 2018;Nzukam et al, 2017;Poppe et al, 2018;Van et al, 2013;Vu et al, 2014Vu et al, , 2018Wu et al, 2020;Zhang et al, 2017). However, these methods tend to not account for imperfect and unavailable data.…”