Mean and median
Two required views of the same gap: the average, and the midpoint. They answer different questions.
The mean gap is the difference between average pay; the median gap is the difference between the midpoints. Both are reported because each hides something the other shows. A small number of very highly paid people distorts the mean but barely moves the median; a structural difference across the bulk of a workforce moves the median. Where the two diverge sharply, the explanation usually lies at one end of the distribution.
More in Analysis
Cost to close
The annualised cost of raising pay to remove the unexplained gap for the employees affected.
Gender pay gap
The difference between the average pay of men and of women, expressed as a percentage.
Pay gap decomposition
Splitting a raw gap into the parts that grade, tenure and hours explain, and the part that remains.
Unexplained pay gap
The part of a gap that objective, gender-neutral factors do not account for. The part that has to be answered …
Start with a baseline on your own data.
One pay-period extract produces the seven figures, the categories that breach, and what closing them would cost.