“…At present, most of the maintenance cost prediction research is carried out for military and civil aircraft (Castagne et al, 2008;Chen et al, 2019aChen et al, , 2019bJohnson, 1990;Ross and Crossley, 2000). The cost prediction method for aircraft mainly includes grey correlation analysis (Chen et al, 2021;Hu et al, 2015), multiple linear regression (Chen et al, 2019a(Chen et al, , 2019bScanlan et al, 2002;Zhang et al, 2014), BP neural network (Li et al, 2012;Sun and Li, 2012;Wu and Yuan, 2011;Zhou and Zheng, 2007), engineering estimation (Sun et al, 2018), support vector machine (Ben-Arieh, 2000;Wang et al, 2014) and genetic algorithm (Yang and Yang, 2012). Large international aviation enterprises usually use parameter method to predict the maintenance cost of civil and military aircraft and express the maintenance cost by the performance parameters of some aircraft and engines.…”