Many companies are reaching their limits when dealing with ever faster changes and the associated uncertainty and complexity. Traditional approaches and tools from strategic planning and management do help companies to defend a competitive advantage in a stable environment in the long term. However, in order to be permanently successful in turbulent times, a continuous review and renewal of competitive advantages is necessary. To address this challenge, this work shows the necessary organizational capabilities for strategic agility. These can be established and applied through the detailed holistic portfolio management system described. This gives companies the tools for agile strategy development and adaptation for lasting success in turbulent times. Based on our own academic research and practical experience from an impressive project history with a large number of leading companies in more than 40 industries, this book offers executives, managers and business owners valuable insights and action-oriented approaches that not only ensure survival in the future, but also enable successful growth!