Lean guru S. Shingo discussed different types of waste, noting that customers should not have to pay for waste like unnecessary packaging or processes. He emphasized that the most dangerous waste is what goes unrecognized. Shingo also explained that the Toyota style is not about working hard, but rather employing people's creativity through a system that questions the status quo with relentless "whys" to break through conventional thinking. At Toyota, people go to think rather than just work.