The transformation to the public cloud comes with many challenges. The book explains three phases that form the basis for determining a company's position in the transformation. Each stage outlines a maturity level of transformation. An assessment framework guides the reader through the analysis of cloud readiness to identify the current stage of the organization and to reach the next stage of realizing the value of the cloud. The framework is supplemented by practical examples. The authors: Niklas Feil works as a consultant for Accenture GmbH and supports customers in planning and implementing cloud transformation. Dr. André Bögelsack works as Managing Director at Accenture AG and supports customers from all industries in the use of cloud services throughout the entire life cycle. Ramón Schulz works as a director at Deloitte Consulting GmbH in the Technology Strategy & Transformation area and is responsible for Cloud Journey Advisory for Energy, Resources & Industrials. Gabriel Abrantes works as a director at Deloitte Consulting GmbH in the Technology Strategy & Transformation area with a focus on Cloud Journey Advisory. The translation was done with the help of artificial intelligence. A subsequent human revision was done primarily in terms of content. .