21 Inquiries to Ask is a structured interview method used to rapidly collect related data from an interviewee. It includes asking a sequence of open-ended questions that encourage the interviewee to supply detailed responses.
The method was developed by journalist Jack Shafer within the Nineteen Nineties. Shafer discovered that by asking a sequence of particular questions, he may rapidly collect a considerable amount of data from his interviewees. Since then, the method has been adopted by journalists, researchers, and interviewers around the globe.