How detailed should an interview schedule be? Qualitative researchers sometimes find themselves developing increasingly elaborate interview schedules (say with 20 or more questions), while others...

How detailed should an interview schedule be? Qualitative researchers sometimes find themselves developing increasingly elaborate interview schedules (say with 20 or more questions), while others argue that a single question is often enough (“Tell me the story of…”) What do you think? What are the consequences of simple versus complex interview schedules?