Inclusion is whether people feel they belong and are treated fairly, whoever they are. These questions measure that through everyday experience rather than opinions about policy. Keep the survey anonymous, and only report results for groups large enough that nobody can be picked out.
We've ticked a short starter set. Change it to suit you.
Belonging
Fairness
Voice
Respect
Leadership
In your own words
6 questions selected
Tips for a better diversity and inclusion survey
Don't report results for any group smaller than about ten people.
Make questions about people's background optional, with a “prefer not to say” choice.
Publish what you found and what you'll do, including the uncomfortable parts.