If you are asking if someone can conduct both a desk research and case study together, the answer is yes. The question of the relationship between a desk research and case study will in fact depend on your research objective. If I was to conduct such a project. I would first approach the desk research as a form of lit review and use the findings to conduct the case study to explore in-depth aspects of the desk research. But the relationship is very clear cut. You just need to know what you objective for doing both is/are. Other than that, a case study can be conducted solely as a desk research meaning that no primary data collection were done and everything (data) were sourced from secondary sources.

If you are asking if someone can conduct both a desk research and case study together, the answer is yes. The question of the relationship between a desk research and case study will in fact depend on your research objective. If I was to conduct such a project. I would first approach the desk research as a form of lit review and use the findings to conduct the case study to explore in-depth aspects of the desk research. But the relationship is very clear cut. You just need to know what you objective for doing both is/are. Other than that, a case study can be conducted solely as a desk research meaning that no primary data collection were done and everything (data) were sourced from secondary sources.

Thank you very much a last question  can grounded theory  be used as a method of qualative data analysis  apart from being a strategy for Research. I have seen different uses  with the same name and i am confused 

I used grounded theory all the time in my social science research project. In conducting research, when you allow the data to determine the path of theoretical issues that you want to explore and approach the analysis without prior theory; that is grounded theory. That is, you allow the data to lead you to the theory that is being explore. This is very different when you already know your theory and approach the data exploration and analysis with that theory in mind see whether or not your data support your theory.

Thus, you can use grounded theory to analyze your data and it is not just a strategy!

thank you so much imagine that  my teachers do not have time  to clarify this questions .

Wherever feasible the desk research must always be complimented by case studies. Going a step forward, it must also be subject to a good validation. Thereafter, from desk research and case study validation a researcher must further aim at universalizing hi/her research.

The term "desk research" was probably coined before the internet era when we collected, analyzed and synthesized information available from the already published (secondary) sources, before we stepped into field survey or experiments. The distinction loosely continues today as we differentiate desk research from field research, where we collect first-hand information through survey or experiments from the latter type. For example, online surveys are not considered desk research despite we can organize and conduct the whole process sitting at our "desks", because these are first-hand information. Getting back to the question as posed, desk research is almost inevitable for any kind of studies, be it a systematic literature review or further investigation through survey or experiments. It follows that, desk research goes well with any other type of investigation, and of course, with case studies. Having said that, it is also important to keep the research objective(s) in mind. A combination of desk research and case studies will make sense only when it properly addresses the research question.

Ioannis,

Absolutely. It all depends on the scope of your study, but today research techniques tend to be hybrid, holistic and integrated to capture different types of data. In a paper titled "Public's right to information versus citizens' right to privacy: a critical view" I remember combining survey with content analysis, to come up with extraordinary wealth and diversity of information. My publication "From Internal Branding to Cultural Transformation" exemplifies the combination you propose: case studies grounded on desk (secondary) research. One type provides you with layers of theory context and existing literature, another will deliver hands-on empirical data under your fingertips to convert to measurable results.  Bring them under the same roof and you got yourself a sound body of research built on solid foundations. 

Best wishes,

Maria

Certainly, yes. If one regard the defining attributes of the concept 'case study' as an appropriately designed study of a purposefully selected single instance of a phenomenon, then any research method deemed to be appropriate within the selected design can be used. 

Yes You are rite. The Desk research is compulsory for conducing statistical research. We extract the variables from the existing research (desk res) and there convert these variables into a research model to generate hypothesis or research questions and probable answers (hypotheses). The literature review provides the guidelines to the research about how to proceed along with references to support your research model.