1) Lean supply chains began in the 1980s with companies like Toyota and Seven-Eleven Japan and continued to develop through the 1990s and 2000s with retailers like Tesco and discounters.
2) Lean focuses on defining value from the customer perspective, looking at the entire value stream, focusing on reducing time to create flow, and solving the root causes of waste like forecast errors.
3) Next generation IT systems must be simpler and enable supply chain flow, not top-down control. Separating high and low volume SKUs and letting inventory absorb variation rather than production schedules also helps reduce waste.