Engagement
Surveys people trust, because anonymity is structural.
Employee surveys that are anonymous by default, NPS scored as NPS, results by company and department, and groups smaller than five hidden.
Built and sent by HR
HR builds a survey from NPS, single choice, multiple choice, scale and free-text questions, and sends it to everyone or a chosen audience, now or at a set time. Employees answer on one page with one submit, in the same inbox as their other tasks, and reminders go out until they answer.
Anonymous by default
Anonymous answers are stored apart from who answered, with no time of answering that could identify anyone. Any group of fewer than five people is hidden from results, so a small team cannot be singled out. The threshold can be raised, never lowered.
A survey can instead be marked as attributed before it is published. Employees are told so, and it cannot be changed afterwards.
Results that mean something
NPS is scored as NPS, the percentage of promoters minus the percentage of detractors, never as an average. Response rates are visible while the survey is open, and results open when it closes, by company, department and other groups.