How We Handle Urgent Issues and Impediments

A traffic system metaphor is very useful when dealing with Kanban boards. Think of the board as a series of roads, with each card representing a car trying to move across the board from left to right.


We want to optimize the flow; therefore, we don’t want to fill up the board. We all know what happens to a traffic system when it is 100 percent full—the traffic system slows to a halt.


We need space, or slack, to absorb variation and enable fast flow.

Having slack in the system not only enables fast ...

Get Lean from the Trenches now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.