The formula for effective survey research involves three key elements:
• Asking the right questions
• Asking those questions of the right sample of people (representative and appropriate)
• Using the data correctly (accurately, and without misrepresentation).

This guide focuses on the first of these: what to consider when designing the content and structure of your questionnaire. It is intended to help anyone who is planning a survey to collect more useful insight or feedback on health services from patients or staff.