Case studies are the preferred strategy used by researchers when asking how, what, or why questions. These types of studies identify and explore operational links between events over time. Case studies may be exploratory, explanatory, or descriptive and may involve one organization and location or multiple organizations and locations for a comparative case study. case study design, data saturation is reached far sooner because the research is bounded in time and space. If one wants to explore causal relationships in a qualitative design then case study is the first, best choice.

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