“…For the above reasons, researches proposed various techniques based on text mining (Chaparro, 2017;Zhang, Chen, Yang, Lee and Luo, 2016) and machine learning (ML) (Zhang, Wang, Hao, Xie, Zhang and Mei, 2015;Tan, Xu, Wang, Zhang, Xu and Luo, 2020) to automate bug report processing. The widely employed ML techniques include Naïve Bayes (NB) (Lamkanfi, Demeyer, Giger and Goethals, 2010;Abdelmoez, Kholief and Elsalmy, 2012), Random Forest (RF) and Support Vector Machine (SVM) (Neysiani and Babamir, 2020), and k-nearest neighbors (K-NN) (Hamdy and El-Laithy, 2019). However, the performance of the ML techniques is not satisfactory (Ramay, Umer, Yin, Zhu and Illahi, 2019).…”