"Practical Complexity Management" is an inter-disciplinary account of how a recently developed concept of complexity may be used in diverse fields, ranging from economics to engineering, social sciences or medicine. The text is unique in that it provides the first concrete examples of actually measuring and rationally managing complexity from a quantitative point of view. The concepts conveyed in the book have been developed by Ontonix, a company pioneering a quantitative approach to complexity and its effective management. The book is a collection of blogs published on the corporate website (www.ontonix.com).