Note: The original working title was "Psychological Safety for Lean Leaders: Make It Safe to Speak Up, So Improvement Can Actually Happen."
Your organization has probably spent real money on problem-solving training.
A3 thinking. Root cause analysis. PDSA cycles. Maybe even kata coaching. The training was probably good. People learned the methods and practiced on case studies, then went back to the floor, the clinic, or the office.
So why aren't more problems getting solved?
Here's the pattern I keep seeing. The problems don't surface. Not because people can't solve them -- because people don't say them out loud.
In 2007, a BBC reporter visited two assembly plants and compared a single tool: the andon cord, which any worker can pull to flag a problem. At a Ford truck plant, the cord got pulled about twice a week, across the entire plant. At Toyota's plant in Georgetown, Kentucky, the same cord got pulled thousands of times a week. Same tool. Same cord. Wildly different results, because of a wildly different culture around what happens when you pull it.
That gap, between "we have the tool" and "people actually use it," is what this book is about. The cost of everything that stays unsaid -- the concern nobody raised, the disagreement nobody voiced, the bad news that sat in someone's inbox because no one wanted to be the messenger -- is what I call the silence tax. Most Lean transformations are paying it without knowing the line item exists.
Two reasons people stay quiet
The first is fear. It doesn't feel safe to say "I made a mistake," or "this process isn't working," or "I think we're wrong about this." The second is futility, and in my polling of practitioners it shows up even more often than fear: people spoke up before, nothing happened, and they concluded it wasn't worth the breath. The suggestion box that collects dust is rarely a fear problem. It's a futility problem. A worker who isn't afraid will still stop pulling a cord that accomplishes nothing. The two problems need two different fixes, and most leaders are only working on one of them.
More than anecdotes
For years, people made this case with stories. Mine included. In 2025, four researchers ran the numbers across 330 manufacturing plants in 15 countries, and the link between psychological safety and improvement capability came back about as strong as these studies ever find. Google's Project Aristotle reached the same conclusion for office teams. Meanwhile, the commonly cited failure rates for continuous improvement run around 70 percent for getting it implemented, and higher still for keeping it going. The tools aren't the problem. The conditions around them are.
And this isn't HR language bolted onto operational work. Deming's eighth point, published in 1986, was "drive out fear." Don Berwick was telling healthcare leaders the same thing in 1989. The respect-for-people pillar of the Toyota Way has always rested on mutual trust. The idea was inside Lean long before the business world had a name for it. What's been missing is a specific account of what builds it and what destroys it.
What's in the book
The first three chapters are about what's happening in your organization right now. The andon cord nobody pulls. The gemba walk where everyone says "things are going well" and the leader accepts it. The employee who got fired for a mistake, after which the next employee made the same one, because nobody fixed the process. If your problem-solving training is underperforming, these chapters will probably tell you why.
The middle four chapters get specific about leadership behavior. Not philosophy. Behavior. What do you say in a daily huddle when someone admits a mistake? What do you ask on a gemba walk instead of "how's it going?" I walk through what it takes to model, encourage, enable, and reward the behaviors that make speaking up both safe and worthwhile, with examples from Toyota and Boeing, from Alcoa under Paul O'Neill, from hospitals, and from smaller organizations where a single leader changed the conversation.
The last two chapters give you a way to measure progress without fooling yourself, then get small on purpose. The final chapter fits on a few pages: pick one team, pick one meeting, change one behavior this week.
Who it's for
If you've read The Mistakes That Make Us, this is the practical companion -- less storytelling, more "what do I do on Tuesday." If you haven't, this book stands on its own. It's also written for the CI director, KPO lead, or improvement coach who already understands all of this and is stuck in an organization where the executives don't. There's a section written specifically for that situation, and the rest of the book hands you a better argument to make.
Why buy it now
This is a Leanpub in-progress book. Chapters 1 through 7 are available now. You'll get every new chapter as it's finished, and the complete book when it's done.
I've spent years trying to understand why Lean transformations stall. The answer keeps landing in the same place. People stay quiet because staying quiet is rational. They've learned it isn't safe, or they've learned it doesn't matter. Both are fixable. But only if leaders change what they do, not just what they say they believe.
That's what this book is for.
-- Mark Graban
