There's a sequence doctors use to train residents: watch one, do one, teach one.
It's the most underrated onboarding and training framework in existence, and almost nobody uses it outside of medicine.
What people usually do instead is: assume they understand, leave them alone, and hope for the best. Then when they make expensive mistakes, the surprise is somehow everybody else's fault.
The Watch Phase: It's Not Passive
Most leaders think watching is passive. The trainee watches while you work and absorbs by osmosis. They're in the room, you do the thing, they're now trained.
That's not watching. That's just proximity.
Real watching means narrating. You're doing the work and explaining why you're doing it the way you're doing it. Not the steps, the thinking. "I'm going to walk through this with you. Notice where I paused. That pause is where you're going to have a problem next week, so watch what I do when the problem shows up."
They're reading everything. Your priorities (which item got your attention first). Your judgment calls (why you said no to that option when another option looked faster). Your recovery from mistakes (what you do when something goes sideways). The confidence in your voice.
This phase can't be rushed. If someone's going to do something that costs money or damages a relationship, they need to see you do it first, well, and while they're asking questions. A week of watching beats a month of calling you after they've already broken it.
Pay attention during this phase to what makes them stop and ask. Those questions are the roadmap to the next phase. The things they don't ask about are usually the things they don't understand yet. As a bonus consider recording this part of the training. The trainee can go back and access it in the future.
The Do Phase: Do It While I'm Watching
This is where most onboarding, and training in general, fails.
Leaders think the next step is "okay, you've watched enough, now you're on your own." Then they disappear and hope the person remembers everything they saw. When it goes wrong, they blame the person for not paying attention.
The do phase means they do the work while you're right there. Present. Watching. Ready to catch the mistake before it costs anything.
This is where coaches earn their title.
You let them make small mistakes so they fix them while the stakes are low. "You're about to talk to this customer the way you heard me do it, but you're going to forget to ask about the trade. Let's do that one more time." Mistake caught before it's a pattern. Correction made because they're doing the work, not watching you do it.
Most people want to get this part done quickly. Get them independent, get them productive, get them off your plate. But speed now is cost later. A person who's been doing something under supervision for two weeks comes out confident and consistent. A person who's been doing something alone for a day comes out scared and sloppy.
If they're new to the role, they need to do it while you're watching until they're consistent. Not perfect. Consistent. Same result the same way, three times in a row.
The Teach Phase: They Explain It Back
Once they're doing it consistently, the teach phase happens naturally.
Ask them to walk you through it. Explain why they do each step. Talk through the decision points. Show you what they do when something goes sideways.
If they can't explain it clearly, they haven't actually learned it. They've memorized a sequence. There's a difference.
This is where you find out what they still don't understand. The things they skip over, rush through, or explain badly...those are the things that won't stick when you're not around.
The teach phase also builds confidence. There's nothing like knowing something well enough to teach it.
And here's the bonus: once they can teach it, they can do it without you...because they understand it.
The Timeline Matters
There's no fixed duration. Some people get from watching to consistently doing in two weeks. Some take two months. Don't measure by time, measure by consistency.
But don't confuse "they did it once successfully" with "they're ready to do it alone." One success doesn't mean they're ready.
A good test: could they do this while distracted, tired, or frustrated? That's when you know they've got it. When the pressure goes up and they still land the outcome the way you taught them.
The Expensive Part Nobody Talks About
Real onboarding costs time upfront. Your time. Your presence. Your attention.
This is why a lot of companies skip it or rush it. They think it's cheaper to just hire people and leave them alone and turn over new ones every year. That's not cheaper in payroll or time. In fact, if you made a hire and the person wasn't capable of doing the job, wouldn't you want to know it sooner than later?
Why This Matters
You can't scale what you can't teach. And you can't teach what you're not willing to model and explain and then supervise while someone else does.
That's the work. That's where good teams come from.
Bottom line: Don't confuse onboarding with paperwork and a welcome lunch. Watch one, do one, teach one!
Ryan Giles