Case study research can mean single and multiple case studies, can include quantitative evidence, relies on multiple sources of evidence, and benefits from the prior development of theoretical propositions. Case studies may involve both qualitative and quantitative research methods. Single subject research provides the statistical framework for making inferences from case-study data. Another suggestion is that case study should be defined as a “research strategy”, an empirical inquiry that investigates a phenomenon within its real-life context (Ref – Wikipedia).
