I am doing a qualitative research, and my question is related to the no. of interviews to be conducted in this type of research. I want to know if there are any minimum-maximum criteria for the number of interviews to be done to meet the research objectives in a qualitative research.
There is no hard and fast rule related to this. It depends on the type of study you are doing. If your study is intended to meet rigour and trustworthiness, thick, rich data, then you would need at least 12 interviews. Whereas, in a grounded study you can conduct 12 or more interviews.
When I was doing my research, I followed the rule called achieving the saturation point. It means to keep on conducting the interviews until you see no new answers are coming from the respondents. So, I would suggest you to do the same.