<prompt> Translate the following text to EnglishKwa hivyo, maswali ya utafiti ni jinsi ya kuamua ni wagonjwa gani wanaohitaji shughuli za matengenezo, ni aina gani za shughuli wanazohitaji, na ni lini au mara ngapi zinahitajika.  <response>: The research questions are how to determine which patients need maintenance activities, what types of activities they need, and when or how often they are needed. 