My question is survey data collection with the help of questionnaires and its analysis to build a model/framework to give recommendations, can a case study research?
The case study layout of research accommodates a wide range of methods of analysis-eclectic. It ensures that it should be purposeful to choose the different methods that the researcher needs to use. Therefore, if you believe the questionnaire would give rise to some knowledge better than the other approaches you are going to use, then go ahead. Note to help you answer the research question is the purpose of choosing data collection methods.
A case study has to be a "case of something," which points to the importance of how you defined your sample. So, if you surveyed a sample that consisted of a specific type of firms, then you could consider that the basis for your case.
L. Gaikwad - Thank you for your question. A Case Study is a qualitative method used to examine phenomena in depth. The design of a case study aims at studying relationships and interactions that are related to the phenomena or problem studied. The method uses several tools such as focus groups, questionnaires, observations and others to collect data and evidence to help researchers in finding answers. Case studies are different from control studies, or experimental studies, or randomised control studies, because in "case study" we do not change the set-up or make a selection, or use control. The researchers in case study assess the situation as it is without any changes. There are several advantages and limitations for case studies. Also, there are several types. I recommend reading more about the theoretical part and also search for case study papers and go through them to deepen your understanding.
As you can see, a questionnaire may be used as a way to collect evidence among other ways. But you cannot run a questionnaire then you try to turn things into a case study. Can Studies characteristics should be there as discussed earlier.
I am not sure why Samy Azer insists that case studies must be qualitative. Certainly many qualitative research projects do take the form of case studies, but that is not the same as saying that case studies can only use qualitative methods.