“…It is found that 22 out of the 33 review articles were not characterized as systematic reviews because they did not illustrate the detailed process of the examined data collections. These non-systematic review articles mainly introduced and reviewed EDM methods and tools (Salter et al , 2017; Anoopkumar and Rahman, 2016; Venkatachalapathy et al , 2017; Sukhija et al , 2015; Bonde and Kirange, 2018; Sachin and Vijay, 2012; Roy and Garg, 2018; Ganesh and Christy, 2015; Marwaha and Ahuja, 2017; Zaffar et al , 2018; Burman et al , 2017), data sources and main applications (Romero and Ventura, 2007; Romero and Ventura, 2010; Romero and Ventura, 2013; Baker and Kisor, 2009; Algarni, 2016). They claimed that EDM methods included not only prediction, clustering, relationship mining, distillation of data for human judgment and discovery with models but also outlier detections, text mining and social network analysis.…”