I’ve been doing this long enough to remember when “supply chain” was a term that lived in operations textbooks. Today it’s front-page news. Tariffs shift overnight. Shipping routes get rerouted around geopolitical flashpoints. A factory in one country sneezes, and a production line in another shuts down.

And yet — when I talk to leaders in manufacturing and operations, many are still running their businesses the same way they did five years ago, hoping the disruption is temporary.

It isn’t.

The False Promise of Prediction

Most business strategy is built on the assumption that tomorrow will look roughly like today. We set annual plans, lock in supplier contracts, and build capacity around demand forecasts. It’s a sensible approach — when the world is stable.

But the world isn’t stable anymore. And here’s the uncomfortable truth: it probably won’t be again anytime soon.

The instinct, when faced with uncertainty, is to try to predict harder. More scenario planning. More sophisticated forecasting models. More consultants with more spreadsheets.

I understand the impulse. But I think it’s the wrong response.

The right response is to stop trying to predict — and start building the capability to adapt.

That’s not a new idea. It’s the oldest idea in Lean.

What Lean Actually Teaches Us About Disruption

When Taiichi Ohno built the Toyota Production System in the aftermath of post-war Japan, he wasn’t operating in a stable, predictable environment. He was operating in scarcity. He had almost nothing — no capital, no large inventory buffers, no guaranteed demand.

Lean wasn’t designed for good times. It was designed for exactly the kind of environment we’re in now.

The principles haven’t changed. What’s changed is how urgently they apply.

Eliminate waste relentlessly. Every unnecessary step, every stockpile held “just in case,” every approval loop that slows you down — in a disruption, these aren’t inefficiencies. They’re vulnerabilities. Waste is fragility. A lean process is an agile process.

Make flow visible. Value stream mapping was never just a tool for finding waste in a stable process. It’s a way of seeing where your exposure lies. Where do you depend on a single supplier? Where does work pile up when one input is delayed? You can’t protect what you can’t see.

Pull, don’t push. One of the most underappreciated ideas in Lean is the pull system — producing to actual demand rather than forecast. In a volatile market, building to forecast is how you end up with a warehouse full of product that nobody wants, while being short on something everyone needs.

Respect for people. This one matters more than people realise in a crisis. When things go wrong quickly, the organisations that adapt fastest are the ones where frontline workers feel safe raising problems. If your people are used to hiding issues until they become disasters, you’ll always be a step behind. The companies that navigate disruption well aren’t the ones with the best crisis plans — they’re the ones with the best problem-solving cultures.

The Tariff Question

Let me be specific, because vagueness is useless in a thought leadership piece.

The current wave of tariff uncertainty has left many manufacturers facing a genuine strategic dilemma: do you re-shore? Near-shore? Find new suppliers? Absorb the cost?

There’s no universal answer. But there are better and worse ways to think through it.

A Lean lens cuts through the noise. Ask: what is the actual cost of your current supply chain — including the hidden costs of long lead times, large batch sizes, and quality issues that don’t get caught until parts arrive? Most companies have never done this calculation honestly.

When you do, re-shoring often looks more attractive than the headline unit cost comparison suggests. A supplier three days away who delivers small batches with high quality can outperform a supplier three weeks away who delivers large batches with variable quality — even before you factor in tariff risk.

That’s not a political argument. It’s a Lean argument.

What Leaders Should Actually Do

If you’re a senior leader reading this, here’s what I’d suggest — not a 12-step programme, just honest guidance.

Start with visibility, not restructuring. Before you reorganise your supply chain, map it properly. Most leaders are shocked to discover how little they actually know about their second and third-tier suppliers. You cannot make good strategic decisions about a system you don’t understand.

Run a waste audit with disruption in mind. Look at your processes through the lens of: “if our lead times doubled tomorrow, where would we break?” That question surfaces different waste than a standard efficiency audit.

Build short improvement cycles into your rhythm. Kaizen isn’t just for the factory floor. Weekly or fortnightly improvement cycles — even in leadership teams — build the habit of adapting. Organisations that practice small change regularly are dramatically better at handling big change when it arrives uninvited.

Invest in your problem-solvers, not just your planners. The people who will save your business in a crisis aren’t the ones with the best spreadsheets. They’re the ones who can stand in front of a broken process, ask why five times, and implement a fix by Friday. Know who those people are. Develop more of them.

The Deeper Point

I’ve seen a lot of business trends come and go. Digital transformation. Agile. Big Data. Each one promises to be the solution — and each one, without the foundational discipline of continuous improvement, eventually becomes another layer of complexity that slows organisations down.

Lean is different. Not because it’s fashionable — it isn’t, particularly. It doesn’t have a TED talk aesthetic. It doesn’t sell conference tickets the way newer methodologies do.

It’s different because it’s not really a methodology at all. It’s a way of thinking. A habit of mind that asks, constantly: What is actually adding value here? What is getting in the way? What do we do about it today?

When the world is uncertain, that question is more important than any five-year plan.

The leaders who will navigate the next decade of disruption well won’t be the ones who predicted correctly. They’ll be the ones who built organisations capable of learning and adapting — quickly, honestly, continuously.

That’s what Lean has always been about.

It’s just that right now, the stakes couldn’t be higher.

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Adam is a Lean coach and the founder of Lean Talent. He works with leaders in manufacturing, operations, and service businesses who are serious about building lasting operational excellence.