Most training reports answer the wrong question. Attendance, completion, a satisfaction score out of five, these tell you an event happened and people didn't hate it. They tell you nothing about whether anyone works differently as a result.
Knowing is not doing
A quiz proves someone can recall what good looks like. It doesn't prove they can do it under pressure, in a real conversation, when a customer pushes back or a stakeholder gets tense. The gap between knowing and doing is exactly where training investment quietly leaks value.
Prove training changed how people work, not just what they know.
Measure before, measure after
The fix is simple to say and powerful to see: measure the behaviour before the intervention, and measure it again after. When the same competency framework scores both, the delta is the evidence. You can point to it. You can defend the budget with it.
Longitudinal performance: the story of development, told in data leaders can act on.
From cohort to individual
Aggregate trends prove the programme worked. But the same evidence drops down to the individual: this person grew most on composure, that team still needs work on discovery. Coaching stops being generic theory and starts being about real patterns in real conversations.