This book presents the success strategies of leading European companies that achieve competitive advantages through lean management and sustainability. The featured companies—participants in the Lean & Green Management Award—show how efficiency improvements can align with ecological and social responsibility. In an era of growing uncertainty—shaped by geopolitical tensions, regulatory pressures, and resource scarcity—sustainable value creation is becoming a key success factor. Companies that systematically boost resource efficiency not only cut costs but also strengthen their resilience and future readiness. The Lean & Green concept merges efficient processes with environmental and sustainability goals, making sustainability both measurable and operationally effective. The author illustrates how lean methods can be strategically applied to advance sustainability, combining economic performance with ecological responsibility. Practical guidance and best-practice examples provide valuable insights for companies aiming to secure long-term competitiveness.