The census is a big and complex task. The National Records of Scotland (NRS), formerly the General Register Office for Scotland (GROS), undertook an extensive programme to make sure that people understood the questions and that the questionnaire delivery and processing arrangements worked.
2009 Census Rehearsal
GROS rehearsed its approach to the 2011 Census by delivering questionnaires to around 50,000 households in west Edinburgh and Lewis and Harris in time for census rehearsal day, on Sunday 29 March 2009.
2006 Census Test
GROS tested its initial plans for the 2011 Census in the 2006 census test.