First, we take into account the main criteria, the best possible quality data that the question will help us obtain. Second, we analyze the burden of the question, meaning whether Canadians can understand it and answer it correctly. Third, there are the costs associated with the question. Lastly, we must ensure that the question won't have a negative impact on another question in the form. As statisticians, we take these factors into account to provide the best possible advice.
On March 12th, 2020. See this statement in context.