Berson et al., (1999) recommended a simple method to evaluate the benefits of a data mining model for the CRM applications. Rigby and Ledingham (2004) suggested a model to calculate the cost of CRM. King et al., (1998) evaluated the fourteen desktop data mining tools. (Collier et al., 1999) describe a methodology for evaluating and selecting data mining software. Runsala (2003) describes a tool called Lou that is considered to overcome the limitations of the various data mining tools like the cost and user friendly aspect of the tools.