Training completions moved from late to early.
An HR compliance team struggled to get people to finish required training. Completions usually came after the deadline, and the nudge was a punitive email with managers copied.
Analysis of past campaigns led to a change in when notifications went out. Completion rates rose, the spread of completion dates narrowed, and both the average and the median moved from after the deadline to before it.
The team stayed compliant without punitive emails, and the culture around training improved.
The average moved about 30 days earlier. Standard deviation is a measure of how spread out completion dates were, and it fell by about 61 percent. In plain terms, people stopped finishing at random and started finishing together, ahead of the deadline.