Yves Merel has successfully introduced and implemented Lean practices in three manufacturing companies with diverse activities: Wagon Automotive, FCI, and Constellium. At each company, he adapted the Lean methodology and tools to their specific priorities. In Wagon Automotive, he utilized the "hoshin" methodology and achieved excellent results in labor productivity and reducing stocks. At FCI, he focused on improving quality to meet customer expectations. With broader responsibilities at Constellium, he worked closely with his team to manage safety and achieved three years with no fatal accidents. Overall, Yves has proven himself a qualified leader of Lean programs, creating networks of specialists to drive practical measures and motivate improvements across management levels.