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Amy Edmondson’s Psychological Safety is not a book about workplace well-being. It’s a book about operational performance — and why the best industrial teams appear to make more mistakes than the rest. By Mounir Telkass, founder of MT-Transition.
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Amy Edmondson is a professor at Harvard Business School. In the 1990s, she led research into medical errors in hospitals. She expected to find a simple correlation: the best medical teams make fewer errors. What she found was the exact opposite. The highest-performing teams appeared to make more errors — or at least, they reported more of them.
The conclusion: the best teams don’t make fewer errors. They report all of them. Lower-performing teams make just as many errors — if not more — but they hide them. What she calls psychological safety has nothing to do with comfort or kindness. It is the shared belief, within a team, that taking an interpersonal risk — flagging an error, admitting ignorance, voicing disagreement — will not result in punishment or humiliation.
In industrial environments under pressure, this is precisely what is most often missing. And it is precisely what costs the most.
The most common misunderstanding about this concept: confusing psychological safety with a pleasant atmosphere, kind management, a “nice” team. A team with high psychological safety is not a team without tension. It is a team where tensions can be voiced without risk of retaliation.
For a transition director arriving on an industrial site, psychological safety can be measured within a few days, without any formal survey. When someone makes an operational mistake — a delivery delay, a quality incident, an unanticipated breakdown — who speaks up first, and how? This is not a question of abstract corporate culture. It is a question of the signals management has sent over the last eighteen months.
This is the heart of the book, and the most counter-intuitive finding of Edmondson’s research. Organizations with high psychological safety accumulate more signals of anomalies than others — not because they malfunction more, but because they capture and escalate all of them.
Organizations with low psychological safety do the opposite. Every management layer filters bad news on its way up. What reaches the executive committee is a smoothed-over, positive, already “arranged” summary. Edmondson cites the Challenger case (NASA, 1986): engineers knew the O-rings could fail at low temperatures. They failed to communicate this information firmly enough because the organization’s culture penalized bad news.
The industrial equivalent plays out constantly, on a smaller scale: the machine breakdown that the maintenance manager “handles directly” without escalating, the quality defect that the line supervisor “settles” with the client before management is informed.
Edmondson identifies three specific manager behaviors that determine a team’s level of psychological safety. First behavior: inviting participation. Not simply listening — explicitly asking. Second behavior: responding productively to bad news. The third behavior is the most demanding: modeling fallibility. Saying “I don’t know” in front of the executive committee. Admitting an analysis error in front of your team.
For a transition director — often expected to be the expert who will “turn the situation around” — this is counter-intuitive. The temptation is to project mastery and certainty from the first weeks. Edmondson demonstrates that this is precisely what shuts down the flow of information.
Mechanical subcontracting site, 120 employees, defense sector. Performance had been declining for two years. A transition site director arrives with a different approach. During his first week, he observes an anomaly: internal non-conformance reports are being filed late. The real explanation — identified through one-on-one interviews without management present: operators who file NC reports “draw attention to themselves.”
Leader behavior, first act: the transition director gathers the team leaders. He publicly announces that, from now on, the number of correctly filed NC reports will be a positively valued performance indicator — not a warning sign. At 60 days: the number of reported NCs has tripled. Scrap detected at the end of the line has dropped by 30%. At 6 months: client delays have been cut in half.
Psychological safety is not well-being — it is an operational advantage. A team that doesn’t escalate problems hides them. And hidden problems cost ten times more to fix.
The best teams appear to have more anomalies — because they report all of them. A dashboard that looks too clean when you arrive on a site is a warning sign, not a mark of quality.
Psychological safety is built or destroyed through three specific manager behaviors. Inviting participation, responding productively to bad news, modeling fallibility.
MT-Transition places industrial transition managers trained in these methods, ready to step in within a few weeks.
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