“…In contrast, the latter does not require pre-classification of the data and can form groups that share common characteristics. To carry out these two main task types, four business data mining approaches are commonly used: clustering (Shao & Krishnamurty, 2008), classification (Mohamadi, et al, 2008), association rules (Mitra & Chaudhuri, 2006) and visualization (Compieta et. al., 2007).…”