What two points in time are compared using the Time-to-Impact versus Time-to-Promotion Ratio?

Answer

Time until measurable impact versus time until a title change or pay raise

This metric compares how long it takes to make a measurable impact (Impact Time) against how long it takes for that impact to be recognized through formal change (Promotion Time).

What two points in time are compared using the Time-to-Impact versus Time-to-Promotion Ratio?
jobgrowthemploymentcareerstability