What production leveling has to do with lean manufacturing

Improving flow through production leveling is one component of lean manufacturing, which is an approach to manufacturing that strives to improve productivity and quality by cutting down on waste in all different aspects of the manufacturing process. Lean manufacturing first surfaced in Japan as a process management philosophy from Toyota Production System, also known as TPS. It strives to improve customer value by reducing a number of different wastes. Lean manufacturing can also be used in conjunction with the six sigma approach to management and manufacturing because lean manufacturing works on cutting down on waste and six sigma works on reducing variations in the processes of manufacturing or providing services.
One way that lean manufacturing works to reduce waste, and even eliminate waste if possible from manufacturing processes and service processes is by improving the flow of work through the manufacturing system, instead of just focusing on eliminating waste. There are several different approaches to improving the flow of products by leveling production by means of what are called Kanban and the Heijunka box.

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