This document discusses different types of questionnaires and factors to consider when designing a questionnaire. It outlines structured versus unstructured questionnaires and face-to-face versus mail administration. Important design considerations include making questions relevant, moderate in length, unambiguous, simple, objective, and in a definite sequence. The questionnaire should also have clear instructions and be both reliable and valid. A pilot study should be conducted to check for bias or technical defects before full implementation.