First, case research can be used for either theory building or
theory testing, while positivist methods can be used for theory testing only.

Second, the research questions can be modified during the
research process if the original questions are found to be less relevant or salient.

Third, case research can help
derive richer, more contextualized, and more authentic interpretation of the phenomenon of
interest than most other research methods by virtue of its ability to capture a rich array of
contextual data.

Fourth, the phenomenon of interest can be studied from the perspectives of
multiple participants and using multiple levels of analysis.