“…The choice of particular metrics is based on various factors, including the nature of the object and its operational context [22,28,41,52]. Regarding fire trucks, significant indicators are mean time between failures (MTBF), mean time to repair (MTTR), mean residual life (MRL), and operational availability (Ao) [8,12,43]. One of the fundamental tasks in reliability analysis involves creating a model for the distribution of lifetimes using actual run-to-failure data [1,20,39,48].…”