The DeLone and McLean (1992, 2003) model is probably one of the most cited models in the IS community. Their 1992 model was successfully tested in many empirical studies (Rai, Lang and Welker, 2002; Ivari, 2005). IS success definition and measurement is still problematic for many factors (Seddon, Staples, Patnayakuni, and Bowetell, 1999). The first factor is the mixture of the technical and social aspects of an IS (Kanellis, Lycett, and Paul, 1998). Second, Alter (2000) argues that information technology and work practices are now so intertwined that it is difficult to identify their respective contributions to success. Other researchers link the difficulty of defining IS success to the methodological aspects involved in measuring IS success “Specifying a dependent variable is difficult because of the many theoretical and methodological issues involved in measuring IS success” (Garrity and Sanders; 1998, p. 14). Seddon et al. (1999) argue that IS success is still a fuzzy concept contingent upon different stakeholders and different types of IT. In the practice community, Markus and Tanis (2000) claimed that there is a fundamental gap in both practical and academic thinking between the lack of consensus and the clarity about the meaning of success, where information systems are concerned.