Michael Bonney's mum listened to him explain Lean principles one day and said: "That's just common sense, Michael."

She's right. Lean is common sense. But common sense isn't common practice.

The Gap Between Knowing and Doing

You know you should organise your trailer. But do you? Every day? You know you should listen to your team's ideas. But do you action them? You know rework is expensive. But do you have a system to prevent it?

The gap between knowing and doing is where Lean lives. It bridges that gap by giving names to things you already feel.

Name It → See It → Measure It → Fix It

• Walking back and forth? That's excessive motion
• Fixing mistakes after the fact? That's rework — triple cost
• Team not sharing ideas? That's unused creativity
• Starting before you're ready? That's over-producing

Once you name it, you can see it. Once you can see it, you can measure it. Once you measure it, you can fix it. That's the system. Every builder has common sense. Not every builder has a system to turn it into common practice.