Greene, Caracelli, and Graham (1989) suggest that five major objectives or motivations exist for conducting MMR. The first one is ‘triangulation’, which provides validation and concurrence of results gained from various methods and designs investigating the same circumstance. ‘Complementarity’, as the second motivation, seeks for further detailing, improvement, interpretation and description of the results obtained from one method with results from the other method. The third one is ‘initiation’, which means unearthing the bias, and discrepancies that cause re-designing of the research question. ‘Development’, the fourth motivation, includes utilizing the findings from one method to deliver clues to other method. The last motivation, ‘expansion’, seeks to expand the size of research with different methods for different investigation factors.