Glaser and Strauss (1967) emphasize that the researcher should have “no preconceived ideas” when collecting and analyzing data. The interpretation given by Glaser and Strauss (1967) proved to be inadequate and unclear. George Allan (2003) describes two problems based on his personal experiences. First, according to Allan (2003) there must be a specific research agenda, including research budget, time and resources, which requires at least an idea of ​​where, when and how the research would end. It is also necessary for conducting interviews, especially when additional questions are deemed necessary. Secondly, there is no prescribed mechanism for coding. Because codes are instructions, it is not easy to identify codes that may appear important later