<prompt> Translate the following text to EnglishHata hivyo, jambo moja ambalo linapaswa kuonekana wazi kabisa kutoka kwa majadiliano ya sifa za muundo wa asili kwa utafiti wa kesi ni kwamba inaweza kuwa jitihada ya gharama kubwa, kwa kuzingatia muda unaohitajika, asili ya kina ya habari inayotafutwa, na haja ya kufikia uaminifu.  <response>: However, one thing that should emerge quite clearly from the discussion of design features intrinsic to the case study is that it can be a rather costly endeavor, given the time required, the rich in-depth nature of the information sought, and the need to achieve credibility. 