The artifacts and behaviors we can easily observe at Lean companies are only the tip of the iceberg. Waste reduction and other Lean practices, principles and tools like A3, kanban, andon and heijunka, are all important parts of Lean but it is only the tip of the iceberg. You need to look below the waterline.
“Toyota’s tools and techniques, the things you see, are built upon invisible routines of thinking and acting, particularly in management, that differ significantly from those found in most companies.”
If you want grasp and become Lean you need to look below the waterline.