Write the questions in a logical structure

Ask about two things in one question

Ask personal questions

Ask open questions

When the questionaire is focused in a specific group

When the response is yes/no

When a question is not clear for the person who replies

When the person who has to make the questionaire is blind

A study on the focused group of people that is going to do the survey

A market study

A trial on a initial questionaire to readjust it after

A type of survey

Do a survey to all the customers of a supermarket during a week from 10 til 12

Amazon sends a email to all ita customers via email

A survey to all the social care workers working in London.

Some questions seem to be more missed than others

Missing responses only because the question in unconfortable for the person asked

Missing responses because they are unrelated to the topic

Responses missed because are not clearly vissible (in the back of the sheet)