<prompt> Translate the following text to EnglishKila moja ya vigezo hivi ni kuhusishwa, katika fasihi juu ya mbinu ya utafiti wa kesi, na viwango vya utendaji kama vile triangulation kuamini muhimu katika kuhakikisha - kama wao ni kufanyika - kwamba utafiti itakuwa nzuri.  <response>: Each of these criteria is associated, in the literature on case study methods, with performance standards such as triangulation believed useful in ensuring-if they are carried out-that the study will be a good one. 