Case study-case study - a qualitative research method that concentrates on supplying a comprehensive description and scrutiny of an identified case situation.historic research - research that uses a practice of methodically investigating past events or mixtures of events to explain what ensured in an earlier period.ethnography - a type of qualitative research that conscientiously illustrates the customs of a grouping of individuals.phenomenology - a type of qualitative research in which the researcher endeavors to comprehend how individuals experience a phenomenon.grounded theory - a general methodology for developing new theory that is grounded in data that are systematically gathered and analyzed.