Most lean deployments aren’t lean. They’re theatre.
I’ve spent nearly 30 years inside manufacturing businesses — running sites, leading transformations, holding P&L. I’ve seen lean deployed well exactly twice, and one of those was then subjugated to a tick box exercise. What I have seen everywhere else is a system that’s been stripped of its philosophy, dressed up in laminated posters, and sold to boards as a cost reduction programme.
Here’s what’s really going on.
1. We Taught People the Tools and Forgot the Thinking
5S. Value stream mapping. Kaizen events. Kanban boards.
Almost every operations manager in manufacturing knows the vocabulary. Most of them can draw a spaghetti diagram. A depressing number of them have never even watched a customer order move from end to end.
The tools are not lean by themselves, the same as a saw is not carpentry. They are improvement tools, but nonetheless, just tools. Lean is a way of seeing and thinking — specifically, seeing waste that you’ve been normalising for years and recognising the waste. You cannot just teach that in a short workshop and then tick the box.
What happens instead: a colleague gets trained, a few projects maybe get completed, a number gets reported to the board, and everyone moves on. The thinking itself never takes root because no one ever changed how decisions get made and the, we simply completed a metric.
2. We Made It a Compliance Exercise
You know the signs. A visual management board that hasn’t been updated since January. SQDIP metrics that get filled in the morning before the leader arrives. A 5S audit score of 98% that bears no resemblance to the state of the shopfloor.
This happens because organisations implement lean as a standard to achieve, not a practice to develop. Someone sets an audit framework, someone else decides it affects the bonus, and within six months you’ve created a bureaucracy that actively hides the problems lean was supposed to surface, nothing really changes.
The Japanese term for this is muri — overburden. We created muri for the people we were supposed to be liberating.
3. The Improvement Activity Is Disconnected From the Business Problem
Ask the average CI team what problem they’re solving. They’ll tell you about their project pipeline. Ask them which projects will move the P&L this year. Watch them hesitate.
Lean, properly deployed, starts with the business constraint. What is stopping us from serving customers better, faster, easier and cheaper? Then you work backwards to the waste causing it.
What actually happens: the CI team selects projects based on what’s visible, what’s politically safe, and what they can complete in time for the annual review. The constraint never gets touched. The P&L never moves.
This is not a people problem. It’s a structural one. The improvement agenda is managed separately from the commercial agenda — and that gap is where lean goes to die.
4. Leadership Delegates Lean to the Lean Team
This one kills more lean programmes than anything else.
The moment a business creates a dedicated lean function and hands responsibility to them, the rest of leadership quietly exits the conversation. The lean team runs events. Leadership runs the business. The two tracks rarely meet, this is way more common than you might expect.
Real lean is a leadership practice. Taiichi Ohno didn’t ask a CI team to go and find the waste — he stood at a chalk circle and watched it himself. He changed how he managed, and that changed how everyone around him managed. This is how I remember true lean thinking and seeing and is how I coach even today.
When the VP of Operations hasn’t done a meaningful gemba walk in six months, you don’t have a lean business. You have a lean department and a disconnected business.
5. We Optimise Parts of the System and Ignore the Whole
A business I know well ran an excellent lean programme in manufacturing. World-class OEE. Strong standard work. Impressive flow.
The product was still arriving late to customers 40% of the time.
Because no one had touched the planning process. Or the procurement cycle. Or the way engineering changes were released into live production. The factory was lean. The value stream was not. Classic sub-optimisation.
Lean is a whole-system discipline. Optimising one node while ignoring the connected flows is not transformation — it’s decoration. The customer doesn’t care how efficient your press shop is if your planner is firefighting and your supplier isn’t on a delivery schedule.
6. We Measure Activity, Not Outcome
Number of kaizen events completed. Improvement ideas submitted. Lean SME’s trained. VSMs produced.
These are not lean metrics. They’re optics.
The only question that matters is: what happened to the customer experience, the cost base, and the capability of the people? If you can’t draw a clear line from your lean activity to those three things, you’re doing activity management, not lean.
Real lean shrinks lead time. It reduces defect cost. It develops people who can see and solve problems without being asked. Everything else is a proxy.
The Uncomfortable Truth
Lean works. The Toyota Production System is not a myth — it’s a 70-year-old proof point that the thinking is sound.
What doesn’t work is importing the vocabulary without importing the discipline. Sending people on courses without changing the management system. Running workshops without changing how decisions get made at the top.
Most lean failures aren’t lean failures. They’re leadership failures wearing lean clothing.
If your lean programme isn’t moving your P&L, isn’t changing how your leaders behave, and isn’t making it easier for your people to do their jobs — it isn’t lean.
It’s waste.
And the first step to fixing it is being honest about that.
adam
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