premise: The ability of the case study to capitalize on insight, to shift focus as the data demand, and to let disparate pieces of evidence fall into place in ways that are not always easy to describe or command is believed to yield a richer, fuller, and truer explanation of why things look the way they do than the more limited number of tests of a priori hypotheses that other methods use.
hypothesis: The case study focuses on the ability to change as data changes.