<prompt> Translate the following text to EnglishHii ni kwa sababu sifa za utafiti wa kesi zinazofaa kwa aina moja ya swali la tathmini sio lazima ziwe sahihi kwa aina nyingine ya swali la tathmini.  <response>: That is, the features of a case study that are appropriate for answering one kind of evaluation question are not necessarily appropriate for answering another kind of evaluation question. 