This document provides guidance on developing and analyzing questionnaires for surveys and research studies. It discusses key steps in questionnaire development including deciding what information is needed, defining the target respondents, choosing a method to reach respondents, developing question content and wording, ordering questions, pre-testing the questionnaire, and analyzing the data collected. Specific question types are also covered such as closed-ended, open-ended, ranking, and Likert scale questions. The document stresses importance of question clarity, avoiding biases, pre-testing questionnaires, and reliability and validity of measures used.