Many companies are reaching their limits when it comes to dealing with ever faster changes and the associated uncertainty and complexity. This is because traditional approaches and tools from strategic planning and management help companies to defend a competitive advantage in a stable environment in the long term. However, in order to remain successful in turbulent times, a continuous review and renewal of competitive advantages is necessary. To address this challenge, this book shows the necessary organizational capabilities for strategic agility. These can be established and applied using the holistic portfolio management system described in detail. This provides companies with 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 company owners valuable insights and action-oriented approaches that not only ensure survival in the future, but also enable successful growth!