Linking data to propositions and having criteria for interpreting the findings are involved in the data analysis steps in case study research. A good case study is expected to show its effectiveness in terms of linking data and setting a set of criteria for interpreting the findings. Criteria for judging the quality of research designs are also essential. In empirical research, there are basically four tests to establish the quality of any empirical social research. Table 3 list the four tests and the case study tactic for dealing with them.