This book develops an interwoven framework for the strategic and financial valuation of digital business designs and platform companies which became game changers for a multitude of ecosystems in the 21st century. But, also incumbents of traditional industries are challenged by those digital natives and have therefore either to revitalize their business design or facing the risk to be marginalized. The business design twin of innovation is resilience to create lasting competitive advantage and capture value for the post-pandemic world of the 20s. The ultimate idea of the book rests on the hypothesis that only the combination of business design analytics - 10C Business Design and the 8 strategic levers of platform strength - with intense financial modeling - Reverse DCF - enables a true understanding of the competitive advantage and value of such business designs. Based on a tailored strategic-financial conceptual framework a set of high-profile, new case studies will highlight the working principles and application of the concept.