Resources / Shop floor problems
Why one new hire slows down the whole bay
The obvious cost of a new hire is his own learning curve, the weeks he takes to get up to speed. The less obvious cost is what he does to everyone around him, the constant small interruptions as he asks whoever is nearest a question that person then has to stop and answer. One new hire's ramp period is really a temporary tax on the entire bay's throughput, not just his own.
The question rarely goes to the same person twice
A formal mentor assignment sounds like it contains the interruption to one experienced technician, but in an actual working bay it rarely stays that clean. A new hire hits a question when his assigned mentor is mid repair somewhere else, so he asks whoever happens to be free, and whoever happens to be free is different every time. Across a single day, three or four different technicians each lose a few minutes to a question that had nothing to do with their own job, spreading the drag across the whole crew instead of concentrating it where a shop might have planned for it.
What it actually looks like over a day
Each individual interruption looks small, a couple of minutes to explain something, a walk across the bay and back. Stacked across a full shift and across several technicians fielding different questions from the same new hire, the total lost time is not small at all, and it lands unevenly, whoever happens to be free absorbs it regardless of whether that was the best use of his afternoon. A senior technician mid diagnosis on a difficult fault loses his train of thought to answer something routine, which costs more than the few minutes the interruption itself took.
The fix is not fewer new hires
None of this is a case for slowing down hiring, a shop that avoids bringing people on to protect the current crew's focus just trades one problem for a worse one. The actual lever is shortening how much a new hire needs to interrupt someone else to get unstuck, which shrinks the drag period without touching the hiring plan at all.
Every question he answers himself is one the bay does not pay for
A new hire who can ask a question by voice and get a cited answer in seconds does not need to find a free technician at all for the routine cases, which is most of them. That protects everyone else's focus, not just his own progress. The senior tech mid diagnosis stays mid diagnosis. The whole bay's throughput during a ramp period looks a lot closer to normal, because the interruption that used to spread across the crew mostly stopped happening.
Why a new hire slows the bay, answered short
Why does a new hire affect technicians who are not training him?
The person he asks is not always his assigned mentor. Whoever is nearest and free answers, spreading the interruption across the whole crew rather than one designated trainer.
Is this an argument against hiring new technicians?
No. It is an argument for reducing how much a new hire has to interrupt others to get an answer, which shortens the drag period without slowing down hiring.
How does giving a new hire a faster way to get answers help the rest of the bay?
Every question he answers himself is one that does not pull a second technician off his own work, protecting the whole bay's throughput, not just his own learning speed.
Protect your senior techs' focus during the next ramp
Bring one new hire and one question that pulled someone off their own repair last week. We will show you what it looks like when he does not have to ask.
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