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However the limitations associated with the sampling, validity, reliability and bias seem to raise concerns among scholars about the reliance on it as a tool of qualitative investigation.
As noted by Corbin and Strauss (1990) in order to comprehend the degree of validity of grounded theory as a qualitative tool of investigation, alterations need to be made in the framework illustrating the construct of validity.
Various researchers have offered an alternative perspective to the concept of validity, considering the application of internal and external validity incompatible with the philosophical basis of qualitative research (Sandelowski, 1993; Stenbacka, 2001; Davies & Dodd, 2002).
It has also been observed that the grounded theory’s approach of using the collected data as a source of judgment for sampling negates the notion of development of hypotheses and their relative testing (Suddaby, 2006).
The emerging sampling framework depicts a loosely coordinated idea of sampling, deviating from the essence of sampling techniques reflected in positivist methodology.
The degree of validity associated with the data obtained through the use of grounded theory has also been challenged by the scholars (Lomborg & Kirkevold, 2003).
One group of thought has emerged, arguing that the core elements used for defining the validity of a quantitative approach can’t have parallel application within the domain of qualitative research.
On the other hand, Sandelowski (1993) argued that such an approach should be incorporated in the methodology with caution as it can have a negative impact on the reliability of the findings and inferences.
The bias involved in the research process can also decrease the degree of trustworthiness and dependability of the inferences drawn from grounded theory.
Grounded theory and case study both have been utilized by the researchers using a qualitative approach to investigate about a phenomenon.
Despite the illustration of the usefulness of grounded theory and case study as a means of studying a phenomenon from a qualitative perspective, there are certain drawbacks that limit the effective incorporation of these tools as a part of the research.