How do people in a group feel about the group? How to collect this sentiment in a non-threatening way?
Periodically survey to gauge sentiment, eg do you enjoy working here? Can you do your job effectively?
Structure questions to have aggregatable answers, eg yes/no, 1-5, etc. Answers are aggregated and anonymized.
Display data comparatively, eg year-over-year, group vs sub-group.
Display results per leadership level, eg a company might call attention to trend and encourage managers to discuss with their teams.