“…The setting of the inspection level was theoretically discussed by simulated data (Boyd et al, 1989;Boyd, 2020) and formally addressed by analytical models supported by real data (Barabino et al, 2013(Barabino et al, , 2014Barabino & Salis, 2019). Further research investigated the scheduling inspection patrols by optimisation methods to provide detailed inspection plans (Yin et al, 2012;Correa et al, 2017;Brotcorne et al, 2021).…”