Evaluative research evaluates existing research to verify if things are going on as predicted such as if a campaign is cost-effective or is meeting the existing performance standards.
utafiti evaluative kutathmini zilizopo utafiti ili kuthibitisha kama mambo ni kwenda kwenye kama alivyotabiri kama vile ikiwa kampeni ni gharama nafuu au ni mkutano zilizopo viwango vya utendaji.