A questionnaire is the mainstay of survey research, used most often to gather information from large numbers of individuals. The questionnaire contains questions (or items) administered online or through the mail that have been standardized to mean the same thing to everyone so that responses can be compared to one another.
It’s always best, of course, to generate a plan to direct questionnaire design and implementation. Points to include in the plan include available resources, outcomes, indicators demonstrating outcome success, sources of information, methods used to gather information, and points at which the information will be gathered. Plans to pilot test the questionnaire should also be an integral part of the plan.
Two types of information are often collected. Quantitative information is best gathered using questionnaires, yielding the summary of large amounts of data and generalizations based on statistical projections.
Qualitative information is gathered from a thorough investigation of issues, using multiple methods, including observations, interviews, focus groups, key informants and journals to ultimately tell a story.