An experienced interviewer takes care of many things: builds hypotheses, selects interviewees, composes invitations, schedules appointments, sets the stage, and, of course, writes an interview script. Any of these preparations can go wrong, but the script failure means all the effort is in vain. So, if you haven’t interviewed people a lot before or you have to delegate it to non-designers, I’d recommend paying attention to high-quality questions, in the first place.

https://www.smashingmagazine.com/2020/06/user-interview-questions/