NPS (Net Promoter Score): Promoters score 9 to 10, Passives 7 to 8, Detractors 0 to 6. NPS is percent Promoters minus percent Detractors, ranging from -100 to +100.
CSAT: percentage of satisfied responses (typically 4 to 5 on a 5-point scale), 0 to 100%.
Engagement Index: a single combined score pulled from multiple survey factors, useful for a quick read before drilling into specifics.
Response rate: percentage of targeted employees who actually completed the survey.
A real privacy control, not decoration: department and group breakdowns respect a minimum group size setting. If a department has fewer people than that threshold, its individual scores are suppressed from the breakdown rather than shown as a de-facto individual score dressed up as a group average. This was specifically fixed and tested to actually enforce the setting, not just display it as an option.