CHAPTER 9
IMPROVING THE KANBAN
One of the basic tenets of kanban (and for that matter the entire Lean philosophy) is that once you implement, you should continuously improve the kanban by reducing the kanban quantities. However, the only way to reduce the quantities, without jeopardizing the customer is to improve the process or reduce your buffers. To improve the process you must reduce scrap, downtime, or changeovers. To initially illustrate this point, we presented four graphs in Chapter 4 that showed the impact of these process improvements on the calculated quantities. (Figures 9-1 to 9-4 show these same graphs.) Reducing the buffer requires ...
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