The way product portfolio management is embedded in a company has far-reaching consequences for its success. Despite high expectations regarding the optimization of desired profits from products, it often leads a niche existence without the necessary assertiveness. However, adequately organized portfolio management offers an effective lever that can make a significant contribution to the company's results. Accordingly, this book examines the topic from a business perspective. The authors focus primarily on strategic and organizational aspects that are essential for company management and portfolio managers to establish a functioning portfolio management system internally. This is contrasted with the perspective of investors, and it is shown which criteria are important for external stakeholders.