Companies measure it at the end. Completion rates, satisfaction scores, a survey that asks people whether they found it valuable while the facilitator is still in the room. Everyone says yes. The report goes in a folder. Nobody looks at it again.
There is a better number, and you already have it. It is how many people sign up for the second cohort without being told to.
What happened at a 450-person software company
We ran a twelve-week program there. First cohort filled the normal way, through the usual internal push.
The second cohort grew 153% over the first, entirely through word of mouth. No campaign. No mandate from the top. People finished, went back to their teams, and their colleagues asked to be in the next one.
Across the two cohorts, 106 people enrolled and 68 stayed active through 24 weeks of it.
I care far more about that 153% than about anything the exit survey said. A satisfaction score tells you how someone felt on the last day. Voluntary enrollment tells you what their colleagues saw in them three weeks later.
You cannot fake the second number. People do not volunteer for twelve weeks of extra work because a slide deck was good.
Why this connects to retention
Ask people why they leave and you get a story about pay or a manager. Ask them why they stayed and you get something different. They stayed somewhere they were visibly getting better at something.
Development budgets get cut first because they are hard to defend with numbers. Then the good people leave, and the exit interviews blame compensation, and the cycle repeats.
Voluntary enrollment gives you a defensible number. It says people are choosing growth here, on their own time, and telling their colleagues to do the same. That is a retention signal you can put in front of a CFO.
Three things that made the second cohort bigger
People built things instead of hearing about them.
Every participant shipped something real into their own job. Not a case study about someone else’s company. A tool they use on Monday. When someone finishes a program holding a working thing they made, their colleagues can see it. A certificate is invisible. A tool that saves the team hours every week is not.
Across the programs we have run, the baseline is about five hours saved per person per week. That is before anyone builds anything at all. The building is on top of that.
Senior people participated instead of sponsoring.
There is a large difference between a leader who opens the session and a leader who does the exercises.
The programs with the strongest second-cohort demand all had someone senior in the room as a participant. Publicly bad at something new. That does something a memo cannot. It makes it safe for everyone else to be a beginner. That is where people get stuck. Rarely the material.
It ran long enough to be uncomfortable.
Twelve weeks, one live session a week, two to three hours between sessions. The length is the mechanism.
A one-day workshop produces a good mood. Nobody tells a colleague to sign up for a good mood. Twelve weeks produces a visible change in how someone works, and that is the thing that gets talked about at lunch.
How to measure yours
Try these four, in this order.
Track voluntary enrollment cohort over cohort. If cohort two is smaller than cohort one, the program is not working, no matter what the feedback forms said.
Count what people made. Ask every participant to name one thing they now do differently, with a number attached. Aggregate it. That is your business case.
Ask at week eight, not week twelve. By the last session everyone is being generous. At week eight they will tell you what is not landing while you can still fix it.
Watch who asks to join next. Names, not counts. If the people asking are the ones you would be sorry to lose, the program is doing something your compensation review cannot.
The uncomfortable part
If nobody asked to join your second cohort, that is the finding. It is more honest than any score you collected on the last day, and it arrived free.
The good news is that it is fixable, and it starts with who is in the room. Put a senior person in the room as a participant. Make people build something they will keep using. Give it enough weeks to be hard.
Then count who signs up next, and let that be the number you take to the board.
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