A method, non-transitory computer readable medium, and apparatus that obtains a version history for a plurality of source code files associated with the computer program. At least one defect probability value is generated for each of the plurality of source code files using at least one metric and the obtained version history. One or more of the plurality of source code files having a higher risk of including one or more defects than one or more other of the plurality of source code files are identified based on the generated defect probability values. Information regarding each of the one or more identified source code files is output.