(2014) did not explain why case study research is used. As a guideline, Yin (2014) proposes three conditions for using the case study. The type of research question is what and how, researchers do not purposely change the behavior of phenomena or separate it from the context of the experimental research and the temporal focus of the phenomenal. In practice, Ho et al. (2014) did not explicitly provide the research questions. Ho et al. (2014) met the other requirements, did not control the behavior of the phenomenon, and focused on the current