An interview schedule is a tool used to guide interviewers and collect data through structured or open-ended questions. There are two main types: in-depth schedules which use open-ended questions for sensitive topics, and structured schedules which resemble questionnaires. A good schedule includes an introduction outlining objectives, a body with major and follow-up questions, and a closing summary. Careful question wording and format can help obtain accurate, relevant responses while minimizing bias.