““Revisiting the freeway analogy, consider what makes the roadway flow. Is it the cars, or the space between the cars? If there were no cars, there would be nothing to flow. If there was no space, the cars could not move. It’s that balance between cars and open space that gives us flowing traffic. That open space is called “slack.” We need slack in our workflow, we need space to adjust. Without slack, we will overload. Too many notes, critiqued an overwhelmed emperor.””